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Review

Impacts of the Biostimulant VIUSID® Agro on Growth, Productivity, and Tolerance to Salt Stress in Crops: A Systematic Review

by
Kolima Peña-Calzada
1,*,
Alexander Calero-Hurtado
2,3,
Jorge Félix Meléndrez-Rodríguez
1,
Juan Carlos Rodríguez-Fernández
1,
Oscar Giovanni Gutiérrez-Cádenas
4,
Marcos Tulio García-González
1,
Lourdes Madrigal-Carmona
1 and
Alay Jiménez-Medina
5
1
Faculty of Agricultural Sciences, Universidad de Sancti Spíritus José Martí Pérez (UNISS), Sancti Spiritus CP 60100, Cuba
2
Programa de Pós-Graduação em Biologia Vegetal, Departamento de Botânica e Ecologia, Instituto de Biociências, Universidade Federal de Mato Grosso, Cuiabá 78060-900, MT, Brazil
3
Municipal University Center of Taguasco, Universidad de Sancti Spíritus José Martí Pérez (UNISS), Sancti Spiritus CP 60100, Cuba
4
Genómica Alimentaria, Universidad de La Ciénega del Estado de Michoacán de Ocampo, Sahuayo C.P. 59103, Michoacán, Mexico
5
Tropical Viand Research Institute (INIVIT), Santo Domingo CP 53100, Villa Clara, Cuba
*
Author to whom correspondence should be addressed.
Horticulturae 2025, 11(4), 407; https://doi.org/10.3390/horticulturae11040407
Submission received: 17 March 2025 / Revised: 5 April 2025 / Accepted: 9 April 2025 / Published: 11 April 2025
(This article belongs to the Special Issue Emerging Insights into Horticultural Crop Ecophysiology)

Abstract

:
The global landscape is marked by climatic, socioeconomic, and demographic complexities, and enhancing food production through byproducts has emerged as a powerful strategy to address these challenges. This review aimed to analyze the potential impacts of VIUSID® agro, an amino acid–based growth promoter, on plant growth, productivity, and tolerance to salt stress. A quantitative systematic review was conducted utilizing databases such as Web of Science, Scopus, and Google Scholar. The research papers highlighted the positive effects of VIUSID® agro on growth and production, as well as on physiological and biochemical indices related to salt stress across various crops. Furthermore, this biostimulant can be administered in different doses and through various application methods. The review also examined its effects during the ex vitro acclimatization phase and in tissue culture. The results demonstrated enhanced crop growth, increased biomass accumulation, modulation of photosynthesis, improved enzymatic antioxidant defenses, and maintenance of ionic homeostasis, all contributing to superior crop performance. These findings suggest that VIUSID® agro is beneficial for a wide range of crops, with its effectiveness primarily attributed to its rich amino acid composition, which influences and modulates various physiological and biochemical processes within plant cells.

1. Introduction

Anthropogenic activity, particularly agriculture, is a major contributor to greenhouse gas emissions and significantly impacts climate change globally [1]. Approximately 40% of the Earth’s surface is dedicated to food production [2]. The intensive use of soil and its resources, in combination with high water demand, has led to negative impacts on nitrogen (N) cycles and biodiversity. Human activities have also contributed to climate change. Meanwhile, there is an urgent need to increase food production to meet the growing food demand of the world’s population [3].
Unit Nations projections estimate that the population will grow from about 7.5 billion today to over 9.7 billion in 2050, highlighting the need for sustainable and efficient food production in modern agriculture [4]. This highlights the complex relationship between human population and agriculture [5], especially the impact of climate change on the most vulnerable populations [6], which has led to a reduction in both the quality and the yield of crops [7,8,9].
Climate change is expected to impact food availability for humans and livestock owing to rising temperatures, uneven rainfall distribution, and soil salinization [10,11,12,13]. These challenges require sustainable alternatives such as bioproducts, biostimulants, and biofertilizers, which enhance plant growth and productivity while mitigating issues such as salinity and drought [14]. Biostimulants are essential in modern agriculture, as they have been shown to enhance plant growth and crop productivity [15]. Additionally, they help crops develop resistance to adverse weather conditions [16,17,18]. Nonetheless, how they confer these advantages has not been entirely clarified [19].
Biostimulants are defined as products made from biological components that enhance plant productivity through the unique properties of their constituents rather than merely through the presence of nutrients or growth regulators [20]. However, biostimulants, especially those rich in amino acids, have been developed and recognized for their positive effects on crops [21]. Likewise, VIUSID® agro (a commercial mixture of aspartic acid, arginine, glycine, and tryptophan) serves as a plant growth promoter that influences and regulates various physiological and biochemical processes within plant cells [22,23,24]. Consequently, it is a significant innovation in the modern agricultural landscape.
This review aims to analyze the effects of VIUSID® agro as a biostimulant on plant growth and agricultural productivity, while also exploring its potential role in mitigating the impacts of abiotic stress. The study focuses on two key research questions: (i) which crops have been most significantly treated with VIUSID® agro, and how have they responded in terms of morphology, physiology, and yield?; and (ii) what are the advantages and limitations of using VIUSID® agro as a biostimulant across various agricultural applications?

2. Methods

To identify and analyze the literature concerning the impacts of VIUSID® agro on agriculture, potential crops, doses, application methods, and main findings, the quantitative systematic review method was used [25]. This methodology reduces publication bias, adopts a protocol-based approach to identify potential research opportunities, and is clear and reproducible [25,26].

2.1. Literature Review

The databases consulted for this research included Web of Science, SCOPUS, Google Scholar, Springer, Frontiers, and Multidisciplinary Digital Publishing Institute (MDPI). Specific keywords were used to identify relevant literature. Search terms were distributed into four groups as follows: VIUSID® agro, vegetables, grains, and various crops (Figure 1). The search was carried out using keywords, and three combined queries were performed for each database. The first search query contained keywords for VIUSID® agro AND vegetables clusters; the second for VIUSID® agro AND grains clusters; and the third for VIUSID® agro AND fruit trees (Figure 1).

2.2. Paper Selection

An initial selection of potential articles for inclusion was made based on their titles and abstracts, followed by a more thorough evaluation of those that passed this preliminary phase. Only peer-reviewed articles were selected. Reference lists of articles and reviews were used to ensure the comprehensiveness of the review and to identify additional studies. This process involved a detailed analysis of the objectives, materials and methods, results, conclusions, and future perspectives sections of each document.
The selection of articles was subject to the following conditions: (1) year of publication from 2015 to 2025; taking into account that the first report of the product’s use was in 2015; (2) original scientific research works published in peer-reviewed scientific journals, review articles, books, and book chapters; (3) thematic areas: agriculture, environmental sciences, and agricultural and forestry sciences; and (4) geographic location.
No languages were excluded, although the selected works were required to present a summary in English, and grey literature was not included. From Section 5 onwards we only papers associated with the product under analysis are included; however, in the introduction and methods, papers pertaining to contextualization and methods are cited, provided that they were related to the thematic area addressed. The total volume of information consulted was 331 documents; however, after analyzing each of them, several exclusion processes were carried out, and finally 101 were integrated into this review (Figure 2).

2.3. Data Extraction

To control selection bias, the established inclusion and exclusion criteria were followed, and the quality of the articles was assessed by means of critical analysis using the GRADE (Grading of Recommendations Assessment Development and Evaluation) adapted System for qualitative studies and literature reviews [27]. Data were extracted from the included articles (where the product was used) according to the following variables of interest: (1) location; (2) species studied; (3) treatments evaluated (dose, factors, control, number); (4) variables under study; and (5) main findings.

2.4. Synthesis and Data Analysis

All data were synthesized using Microsoft Excel® software. In addition, VOSviewer software (version 1.6.20) was used to analyze the literature published during the last decade and to extract critical points and possible gaps or most and least explored points. The available variables in each article were compiled in a single table to compare them and create the figures for their interpretation. Furthermore, due to the division by crops and to facilitate the results analysis, the articles from Section 5 onwards were first grouped according to the type of crop (a) and type of farming system (b) and treated as discrete variables. The increase or lack of increase in yields and the variables that contributed to this were also taken into account.

3. Mechanism of Action of VIUSID® Agro Constituent Amino Acids

Amino acids act as biologically active substances and play various roles in promoting plant growth [28]. In addition, when applied exogenously, they mainly function as plant growth regulators, leading to improved crop resistance to stress, increased yield, and optimized quality of agricultural products [24]. Moreover, they have a chelating influence on macronutrients such as magnesium, which more easily regulate the uptake and transfer of all types of nutrients within the plant, as a result of the impact on the permeability of cell membranes [29].
Amino acids play a fundamental role in various enzymatic processes within plant cells, including both primary and secondary metabolism [30]. Also, they have a notable influence on numerous physiological and biochemical processes, including germination, vegetative growth, fruit ripening, and the signaling and activation of defense systems against biotic and abiotic stress [31]. Lastly, they contribute to osmoregulation, help in the inactivation of reactive oxygen species (ROS), and act as an important N source [32].
Aspartic acid plays a fundamental role in metabolic activation and the biosynthesis of several metabolites. It also acts as a precursor to the tricarboxylic acid cycle and participates in the synthesis of other essential amino acids, such as lysine, threonine, isoleucine, and methionine, in addition to being an essential component for nucleotide synthesis and for the production of nicotinamide adenine dinucleotide [33]. Likewise, aspartic acid is also involved in the synthesis of asparagine, an essential compound for N transport and storage, improves enzymatic activity, and plays a fundamental role in the mobilization of energy reserves during seed formation [29].
Exogenous application of arginine improves carbon utilization, activates essential metabolic pathways, and upregulates carotenoid- and lipid-related genes, such as those encoding arginine decarboxylase, carnitine transporter, arginine succinate synthase, nitric oxide synthase, and ornithine aminotransferase [34]. In addition, arginine favorably influences the transcription of genes involved in crucial processes such as carbon fixation and pyruvate metabolism, which are essential for energy production in plants, as occurs in the Krebs cycle [35]. Likewise, arginine is the main substance for the synthesis of osmolytes and signaling components, such as proline, nitric oxide, and polyamines, and is known to efficiently increase the activity of antioxidant enzymes [36].
Glycine is associated with plant growth optimization, nutrient uptake and translocation, photosynthetic activity, and signaling, has semi-hormonal effects, and is involved in N metabolism and osmotic regulation [34]. It is also an intermediary of phytohormone biosynthesis and acts as an antioxidant, protecting plant cells from damage caused by ROS [37,38].
Tryptophan is one of the nine essential amino acids and acts as a bioactive precursor of auxin in plants, and its exogenous application can increase the auxin content in plant tissues and directly benefit growth and productivity [39]. Moreover, this amino acid can be applied in different ways, such as by foliar spraying (it is directly metabolized as auxin), by adding it to the soil, or by immersing seeds in it, which leads to positive effects on seedlings’ initial growth [40]. It has been demonstrated that foliar application of this amino acid benefits seed germination, promotes the accumulation of dry mass in plant organs, increases plant height, increases the chlorophyll content in leaves and the dry mass of reserve organs, increases the root/aerial part ratio, and consequently increases yield more than 40%, depending on the crop [41]. Furthermore, high applied concentrations increase the content of total proteins and alkaloids, as well as the activities of gibberellin, cytokinin, and abscisic acid [40,41], and also result in beneficial abiotic stress regulation [42].
VIUSID® agro is composed of several amino acids (i.e., aspartic acid, arginine, glycine, and tryptophan) that mitigate salt stress [23]. In this context, aspartic acid promotes proline synthesis, maintaining osmotic balance. Arginine regulates the production of nitric oxide and polyamines, improving photosynthetic efficiency and reducing oxidative damage [28]. Glycine facilitates potassium (K+) uptake, thereby decreasing sodium (Na+) content and maintaining ionic homeostasis [23,34]. Together with tryptophan, these amino acids optimize osmoregulation, photosynthesis, and the antioxidant defense, improving tolerance to salt stress [43].
Recent studies have shown that exogenous application of amino acids is equally beneficial when combined or formulated into an amino acid–based growth promoter. This strategy is effective, both individually or combined, leading to significant promotion of stress tolerance and increasing plant growth [23] and performance [31]. Furthermore, foliar application of amino acid mixtures favors osmolyte overaccumulation, maintains the photosynthetic machinery, and upregulates secondary metabolites and antioxidant systems [16,44]. VIUSID® agro is composed of a mixture of amino acids, each of which plays an important role in plant metabolism, leading to its impact on growth, productivity, and salt stress remediation [22,23], which will be summarized below.

4. Bibliography and Distribution Characterization by Year and Crop Group

VOSviewer software was used to analyze the literature published during the last decade in the selected databases. This tool was also applied to connect the keywords associated with the following terms: “VIUSID® agro”, “growth”, “productivity” and “abiotic stress”, in order to generate a map highlighting the critical points of the research reports (Figure 3). In the map generated, 11 research hotspots were identified, including “plant”, “biostimulant”, “yield”, “treatment”, “effect”, “dose”, “growth”, “growth promoter”, “production”, “foliar application”, and “use”, all of which were closely related to “VIUSID® agro”, as well as to growth and productivity.
Regarding the application of VIUSID® agro, most published articles focus on plant growth and productivity responses under normal and saline stress conditions. While salt stress was the only abiotic factor investigated, it was been found to be infrequent and is not directly represented on the map. Additionally, no studies explored the potential effects of VIUSID® agro on other abiotic stresses, such as drought, extreme temperatures, flooding, and heavy metals.
Furthermore, concerning the effects on plant growth and productivity associated with VIUSID® agro, key research areas that have emerged in recent years include “leaf area”, “biomass production”, “fruit production per plant”, “fruit mass”, and “yield”. These variables have also been the most extensively studied in the past two years (Table 1, Table 2 and Table 3).
Scientific articles related to VIUSID® agro and crop groups published from 2015 to 2024 (the year each study ended) in journals indexed in the databases mentioned above were evaluated (Figure 4). A notable increase in research and dissemination of results was observed throughout this period. The first reports on the use of the product date back to 2015, focusing on grain crops, followed by studies on vegetables in 2016. From 2017 onwards, there was steady growth in the number of publications, expanding the verification of beneficial effects of VIUSID® agro on various crops, including not only vegetables and grains, but also roots and tubers, fruit trees, pastures and forages, and forest crops. Moreover, since 2019, reports have highlighted the benefits of VIUSID® agro on plant growth and productivity, as well as the anti-stress effects on crops exposed to soil salinity. Furthermore, in 2025, a research article was published that is mentioned in Table 2, but it was not included in the analysis because it used information from previous years (the study was completed before 2025) (Figure 4).

5. Effects of the Application of an Amino Acid–Based Growth Promoter on Horticultural Crops

The effects of the amino acid–based growth promoter (VIUSID® agro) on various horticultural crops have been evaluated (Table 1). The most common application method was foliar spraying, using doses varying between 0.1 and 1.0 L ha−1. The parameters most evaluated in the research were morphophysiological, growth, and production variables. In horticultural crops, notable effects were achieved, particularly in garlic (Allium sativum L.) (Table 1), which showed a 65% increase in yield with a dose of 0.25 L ha−1 compared to the control [45,46]. Another vegetable studied was radish (Raphanus sativus L.), which achieved a 50% increase in yield with the application of the 0.7 L ha−1 dose compared to the control [47]. In lettuce (Lactuca sativa L.), a 33% increase in fresh leaf biomass and a yield greater than 80% were achieved under hydroponic conditions [48,49]. On the other hand, in beets (Beta vulgaris L.) (Table 1), a stimulation of the physiological response was observed, resulting in a 34% increase in production [50]. VIUSID® agro was also used to enrich culture media with solutions between 1.0 and 2.5 mL L−1 (Table 1). The benefits of in vitro propagation were in bulb development and shelf life [46,51]. It is important to note that the variability in the applied doses is related to the species evaluated, as well as to the characteristics of the soil or substrate and to the climatic conditions or season of the year during which evaluation of the product was carried out.
Table 1. Effect of the application of VIUSID® agro on various horticultural crops.
Table 1. Effect of the application of VIUSID® agro on various horticultural crops.
CropsMode or Interval of ApplicationDose or ConcentrationMorphophysiological and Production ResponsesReferences
Solanum lycopersicum (L).Foliar spraying
at 7, 14, and 21 days.
0.10, 0.20, and 0.30 L ha−1Productivity increased (fruits per plant, fruit mass and yield)[52]
L. sativa;
B. vulgaris; R. sativus
Foliar spraying every 7 days.0.20, 0.50, 0.70, and 1.00 L ha−1Plant growth as leaf number, diameter and mass of commercial root and stem, and significantly increased yield.[47]
R. sativusFoliar spraying every 7 days.0.20, 0.50, 0.70, and 1.00 L ha−1Improved morphological variables, growth rates, and performance.[53]
R. sativusFoliar spraying every 7 days.0.20, 0.50, 0.70, and 1.00 L ha−1Improved morphological variables, growth rates, and performance.[54]
A. sativumFoliar spraying every 7 days.0.25, 0.50, and 0.75 L ha−1Improved plant height, number of leaves, bulb diameter, and yield.[45]
A. sativumCulture medium.0.5, 1.0, 1.5, 2.0, and 2.5 mL L−1Beneficial effects on in vitro propagation.[46]
Cucumis sativus (L.)Foliar spraying every 7 days.1.0, 2.0, and 3.0 mL L−1Improved fruit per plant and mass, increased seed yield per area.[55]
Allium cepa (L.)Foliar spraying every 7 days.30 mL ha−1Increased yield and post-harvest life.[56]
L. sativaFoliar spraying every 7 days (starting 16 days after sowing).0.20, 0.40, 0.60-, and 0.80-mL L−1Under hydroponic conditions, plant growth, plant length, number of leaves, leaf area, and the fresh and dry mass of plants were benefited.[48]
A. sativumCulture medium enrichment.1.0, 1.5, 2.0, and 2.5
mL L−1
Under in vitro conditions it stimulated the development and formation of bulbs.[51]
Daucus carota
(L.)
Foliar spraying every 7 days.0.10, 0.20, and 0.30 L ha−1Increased number of leaves, root diameter and length, greater mass accumulation (dry biomass), and yield.[57]
A. sativumFoliar spraying after sprouting every 7 days.200 mL ha−1Increased yields and post-harvest life.[58]
B. vulgaris var. CiclaFoliar spraying every 7 days.0.9, 1.2, and 1.5 mL L−1Beneficial effects on growth (number of leaves, stem diameter, fresh and dry mass of leaves) and yield.[59]
L. sativaFoliar spraying every 7 days (three applications).0.15, 0.20, and 0.25 mL L−1The number of commercial leaves, root length, plant mass, and yield were improved.[49]
A. sativumFoliar spraying every 15 days.0.25 L ha−1Net assimilation rate, relative growth rate, and leaf area ratio were enhanced.[60]
A. sativumCulture medium enrichment.2.00 and 2.50 mL L−1Beneficial effects on induced mutagenesis in garlic (prebasic seed can be started directly in the acclimatization phase).[61]
B. vulgaris var. CiclaFoliar spraying every 7 days.0.90, 1.20, and 1.50 mL L−1Improved growth (i.e., number of leaves, stem diameter, fresh and dry mass of leaves) and yields.[62]
D. carotaFoliar spraying every 7 days.0.10, 0.20, and 0.30 L ha−1
Greater number of leaves, greater root diameter and length, greater accumulation of dry biomass, and greater yield.[63]
B. vulgarisFoliar spraying every 7 days.0.30, 0.60, 0.90, and 1.20
mL L−1
Improvement of morphological variables, growth rates, total chlorophyll, and yield.[50]

6. Effects of Applying an Amino Acid–Based Growth Promoter on Grain Production

Various grain crops respond to the application of VIUSID® agro (Table 2). The most frequent application mode was foliar spraying, with an interval of 7 days, and it was typically applied in the physiological phases of greatest nutrient demand based on crop type. In addition, beans (Phaseolus vulgaris L.) were most frequently evaluated, and the doses ranged from 0.25 to 1.0 L ha⁻1, which resulted in an increase in production between 11% and 30%, depending on the variety [64]. In addition, an evaluation was carried out without any fertilizer addition, in which foliar spraying at a 0.25 L ha⁻1 dose achieving a yield increase of 42% compared to the control [65]. Hence, this dose is the best option for bean production due to its contribution to reducing the amount applied, even with soils poor in nutrients.
Another of the most evaluated crops was maize (Zea mays L.), where the product demonstrated significant benefits in crop growth and production [66,67]. An increase in protein percentage was also observed, as well as in the levels of oils, carbohydrates, and grain yield [68], with foliar application at doses of 0.3 and 0.5 L ha−1 that did not differ from each other and significantly exceeded the control, suggesting that these doses may be considered for use in culture (Table 2).
In the case of rice (Oryza sativa L.), the product favored various variables of growth and production [69]. Likewise, yield increases of more than 20% were recorded for sesame (Sesamum indicum L.) and peanuts (Arachis hypogaea L.) with a dose of 0.25 L ha−1, which was the one with the best results compared to the rest of the treatments [22,70], and in the protein content of wheat (Triticum aestivum L.), among other important variables [71].
Table 2. Effect of the application of VIUSID® agro on grain production.
Table 2. Effect of the application of VIUSID® agro on grain production.
CropsMode or Interval of ApplicationDose or ConcentrationMorphophysiological and Production ResponsesReferences
P. vulgarisFoliar spraying every 7, 14, and 21 days after sowing.0.10 L ha−1Increased growth, grains per pods, and grains per plants, as well as agricultural yield.[72]
Z. maysFoliar spraying at 5, 7, and 10 days after sowing.0.96, 1.44, and 2.0 L ha−1Improved agronomic characteristics and the relationship between grain yield and different doses.[66]
P. vulgarisFoliar spraying every 7 days during three physiological phases: growth, flowering, and fruiting.0.50, 0.80, and
1.0 L ha−1
Favored plant growth and production through an increase in legumes per plant, increased the mass of grains, and favored production per plant and yield.[73]
P. vulgarisFoliar spraying every 7 days0.50, 0.80, and 1.00 L ha−1Favored the growth of plants and production through an increase un legumes per plant and increased mass of grains, production per plant, and yield.[74]
Z. maysFoliar spraying at 7, 10, and 14 days.0.96, 1.44, and 2.00 L ha−1The percentage of protein, fat, and carbohydrates and grain yield benefited.[68]
P. vulgarisFoliar spraying every 7 days.0.5, 0.8, and 1.0 L ha−1Increased plant growth, increased pods per plant, and increased production.[64]
Oryza sativa (L.)Foliar spraying at maximum
tillering and rearing.
150 mL every 0.42 ha−1Growth and production benefited.[69]
Z. maysFoliar spraying at 15, 30, and 45 days after germination.0.10, 0.30, and 0.50 L ha−1Stimulated growth by 24.55% and increased yield by 45.06%.[67]
Glycine max (L.)Foliar spraying weekly.0.40, 0.80, and 1.20 mL L−1Enhanced photosynthesis, transpiration, stomatal conductance, quantum and photochemical efficiency, relative water and proline content, Na+/K+ ratio, and dry mass accumulation and decreased lipid peroxidation.[23]
Triticum aestivum L.Foliar spraying combined with compost and N fertilizer.0.75, 1.13, and 1.50 L ha−1Increased grain yield and quality. Increased grain content of proteins, carbohydrates, total sugars, phosphorous, K, calcium, copper, and zinc and reduced the need for chemical fertilizers.[71]
Z. mays (forage)Foliar spraying combined with N levels.0.90 L ha−1Improved fresh biomass and yield.[75]
O. sativaFoliar spraying at maximum tillering, panicle initiation, and grain formation.0.70, 1.40, and 2.10 mL L−1Benefited chlorophyll content, plant height, and grain yield per hectare. Higher relative efficiency of the area.[76]
P. vulgarisFoliar spraying every 7, 14, and 21 days after planting.0.10 L ha−1Improved number of legumes per plant, production per plant, and agricultural yield.[77]
P. vulgarisFoliar spraying every 10 days after germination.0.25, 0.50, and 0.75 L ha−1More legumes per plant, grains per plant, grains per legume, and agricultural yield.[78]
P. vulgarisFoliar spraying at phenological phases V4, R5, and R7.0.50, 0.75, and 1.00 L ha−1Plant height and stem diameter were favored, as well as legumes per plant, grains per legume, seed mass, and yield.[79]
P. vulgarisFoliar spraying weekly, starting at 10 days after germination.0.25, 0.50, and 0.75 L ha−1Improved the number of legumes per plant, grains per plant, and agricultural yield.[65]
S. indicumFoliar spraying in vegetative stages V2–V6 and reproductive stages R6–R8.0.25 and 0.50 L ha−1Enhanced plant height, number of leaves per plant, leaf area index, flowering onset, capsules per plant, seed mass, and yield.[22]
A. hypogaeaFoliar spraying weekly at phenological phases V1, V2, V3, V4, V5, and R1.0.25 L ha−1Better plant length, number of stems per plant, chlorophyll content, fruit per plant, grains per plant, and yield.[70]
A. hypogaeaFoliar spraying in physiological phases demanding nutrition.0.25 L ha−1Enhanced plant growth, yield, and components.[80]

7. Effects of the Application of a Growth Promoter on Other Crops of Economic Interest

The growth promoter has been evaluated in various crops of economic and agricultural interest, such as sugarcane (Saccharum spp.), coffee (Coffea arabica L.), and several species of grasses and forage plants, among others (Table 3). In the case of sugarcane, the product favored the acclimatization process of the seedlings, which resulted in an increase in tillering and pigment content [81]. In addition, an improvement in seedling survival and in various morphological characteristics, as well as in other quality-related variables, was observed [82].
On the other hand, in coffee cultivation, evaluations have focused on seed germination, where significant improvements were observed in several key indicators. A 58% increase in leaf area and a 66% increase in dry biomass accumulation were achieved compared to untreated plants [83]. In addition, in vitro somatic embryogenesis obtained a 100% survival rate when using the product [84]. In the nursery phase, more vigorous seedlings were produced, which is crucial for this crop, as having quality seedlings facilitates their successful establishment in the field [85].
In crops such as tobacco (Nicotiana tabacum L.), increases in leaf area of more than 50% were observed in nursery seedlings when doses of 0.50 and 0.70 L ha−1 were applied. However, for the nursery, it is recommended to use a dose of 0.20 L ha−1, as this favors a better proportion of seedlings and increases survival during transplanting [86]. On the other hand, in acacia nurseries, it was possible to reduce the time the seedlings remained in the nursery and improve their quality compared to not using the product [87] (Table 3).
Table 3. Effect of the application of VIUSID® agro on other crops.
Table 3. Effect of the application of VIUSID® agro on other crops.
CropsMode or Interval of ApplicationDose or ConcentrationMorphophysiological and Production ResponsesReferences
Colocasia esculenta (L.) SchottFoliar spraying
during the acclimatization phase.
0.50, 0.70, and 1.00 L ha−1Increased growth, plant height, and root length, and provided better conditions in the acclimatization phase.[88]
N. tabacumFoliar spraying every 7 days.0.2, 0.5, 0.7, and 1.0 L ha−1Seedling growth and quality increased, and growth rates benefited. [86]
Saccharum spp.Daily for the first 3 days and then weekly.0.50 and 0.80 mL L−1Increased plant survival multiplication coefficient ex vitro regardless of the planting season and improved morphophysiological variables. In the rainy season, 0.50 mL L−1 had a greater effect on plant variables in vitro.[82]
Saccharum spp.Immersion before planting the buds.0.80 mL L−1It benefited from the establishment of the sugarcane mother plant bank under semi-controlled conditions.[89]
Saccharum spp.Two foliar sprays daily the first 3 days and then once a week (ex vitro acclimatization).0.80 mL L−1The survival percentage of seedlings, height, leaf length, total chlorophyll, and dry mass of the aerial part increased. [90]
Gossypium hirsutum (L.) cv. BRS 286Independent fertigation and in mixtures with biofertilizers.1 mL L−1Improved plant height, leaf area, number of flower buds, and bud mass. Also enhanced soil characteristics, macronutrients, cation exchange capacity, and saturation percentage.[91]
Coffea arabica L. cv. Caturra rojo-884Foliar spraying twice daily for the first 3 days and then once daily application from day 7 to day 90 after transplantation.0.50 and 0.80 mL L−1High survival rate in the in vitro propagation protocol via somatic embryogenesis compared to control. Morphophysiological variables were significantly improved with use of the product.[84]
Morus alba (L.);
Cratylia argentea (Desv) O. Kuntze
Tithonia diversifolia (Hemsl.) A. Gray
Immersion of the seed for 12 h.0.80 mL L−1Benefited bud sprouting and favored rooting.[92]
Cucumis melo (L.)Seed immersion and foliar applications, fertigation.100, 150, and 200 mL ha−1Increased number of leaves, stem diameter, and fresh and dry mass of the aerial part, and the rate of CO2 assimilation and fruiting increased.[93]
Musa spp.Foliar application during the first, third, and fifth weeks after transplantation. Ex vitro acclimatization.0.20 mL L−1Basal diameter (mm), height (cm), number of leaves, leaf area (cm2), radial length of roots emerging directly from the corm (cm), biomass of the leaf, and underground area improved with respect to the control treatment.[94]
C. arabicaFoliar spraying monthly from the appearance of the second to the fifth pair of leaves. A total fourth applications were performed.0, 0.20, 0.40, 0.60, 0.80, and 1.00 mL L−1Increase in stem length and diameter, dry mass, quality index, and leaf area of coffee seedlings.[85]
C. arabicaSeed immersion and foliar applications when seedlings grew the second and fourth pair of leaves.0.50 mL L−1Improved seed germination, seedling length, stem diameter, leaf area, total dry mass, and efficiency index.[83]
Zingiber officinale RoscoeTwo foliar applications
were performed daily the first 3 days and then once a week. Acclimatization ex vitro up to 45 days.
0.5- and 0.8-mL L−1Significantly increased survival. In addition, after 90 days of cultivation, the highest growth and quality of the plants was achieved.[95]
Saccharum spp.Foliar spraying twice a day (9:00 am and 4:00 pm) for the first 3 days and, from 7 days, weekly application up to 45 days.0.50 and 0.80 mL L−1Increased plant height, stem diameter, total chlorophyll content, and fresh and dry mass of the plants. After 60 days of cultivation, acclimatized in vitro plants were obtained with a height of more than 15 cm. Also increased the survival of sugarcane plants by more than 20%. Tillering increased in vitro under ex vitro acclimatization conditions in both planting seasons.[81]
C. arabicaFoliar spraying once a month from the appearance of the second pair of levels to the fifth pair of leaves.
Two applications to the second, fourth, and sixth pair of leaves and three applications to the third and fifth pairs of leaves.
0.60 mL L−1Favored morpho-agronomic characteristics and efficiency.[96]
Moringa oleifera L.Inoculation of the seeds with single and mixed bioproducts.1.00 mL L−1Increased germination speed and uniformity of seed vigor.[97]
Acacia mangium Willd.Weekly foliar spraying of seedlings (nurseries).1.20, 1.50, and 1.80 mL L−1Increased plant length and stem diameter, improved the Dickson Quality Index (DCI), improved growth rates, and reduced time in nursery.[87]

8. Effects of Biostimulant Application on Crops Subjected to Salinity Stress

The use of biostimulants such as VIUSID® agro has been studied to mitigate the effects of salt stress in various crops. In a study on lettuce cultivation (L. sativa) under salinity conditions, it was concluded that biostimulant application at a dose of 150 mL ha⁻1, both in soils with an electrical conductivity of 1.60 dS m⁻1 and in soils without salinity, did not significantly affect the leaf development and root volume of plants. However, the results suggest that the biostimulant may be a useful tool for promoting healthy growth under adverse conditions, indicating its potential as a mitigator of salt stress [98].
According to these findings, the application of VIUSID® agro to watermelon plants (Citrullus lanatus (Thunb.) cv. Crimson Sweet) exposed to a salinity level of 3.60 dS m⁻1 resulted in an increase in the number of leaves, as well as improvements in the fresh and dry biomass of the aerial parts, along with better dry mass distribution. Furthermore, under moderate salinity conditions (2.60 dS m⁻1), the biostimulant positively affected several growth parameters. Notably, even under low salinity conditions (0.60 dS m⁻1), a significant increase in total fresh and dry biomass was observed. These findings support the notion that the biostimulant has the potential to improve plant development in saline soils [99].
In addition, in a study on beans in sandy soils affected by combined abiotic stress (saline water, saline soil, and lack of nutrients), organic amendments were used in conjunction with VIUSID® agro to increase bean seed yield and protein content. The results showed that the combination of vegetable compost and 1.5 L ha⁻1 of foliar-applied VIUSID® agro significantly increased seed yield in cultivars Sakha-4, Sakha-1, and Giza-843 by 17.2%, 33.0%, and 19.8%, respectively, compared to the control. This study suggests that the combination of organic amendments and biostimulants may be an effective strategy for improving productivity under conditions of salt stress [100].
In a study on soybean plants under salt stress, foliar application of VIUSID® agro showed positive results. Using a factorial design (4 × 3) with different biostimulant concentrations and salinity levels (50 and 100 mmol L−1 NaCl), it was observed that the application of VIUSID® agro significantly improved plant growth, K+ accumulation, relative water content, photosynthesis, transpiration, and stomatal conductance. The highest concentration of biostimulant (1.2 mL L⁻1) proved to be the most effective, reducing Na+ accumulation and oxidative biomarkers. These findings support the idea that the amino acids present in the biostimulant can mitigate the effects of salt stress in soybeans, promoting tolerance and sustainability [23].
However, not all studies have found significant benefits with the application of VIUSID® agro. In recent research on watermelon seedlings, it was observed that the application of the biostimulant at a level of 300 mL ha⁻1 failed to mitigate the toxic effects of salinity in the substrate. Seedlings exposed to salt concentrations between 0.6 and 4.6 dS m⁻1 showed limited growth and development, suggesting that the recommended dose was not sufficient to counteract salt stress in this species. This finding highlights the need to investigate higher or alternative doses of biostimulants to improve seedling resilience under saline conditions [101].

9. Conclusions and Future Perspectives

VIUSID® agro has proven to be highly effective in various horticultural and grain crops, showing significant increases in yield and improvements in morphological variables. In garlic, the yield increased by 65%, while in radishes it increased by 50%. In lettuce, a notable increase in fresh and dry biomass was observed, especially under hydroponic conditions. In grain crops such as beans, corn, and rice, improvements were also recorded, highlighting a 42% increase in beans with a dose of 0.25 L ha⁻1, without additional fertilizers.
In addition, VIUSID® agro showed benefits in sugarcane, coffee, and tobacco, improving seedling acclimatization and nursery vigor. It is also suggested that it may be useful in increasing the productivity of basic grains, which are essential for food security. Regarding mitigation of abiotic stress, the biostimulant was effective against salt stress, improving growth under conditions of moderate salinity, although the results were less consistent with high salinity. It is important to investigate areas that have not been explored such as other stresses, gene expression, physiological and biochemical mechanisms, and variability in crop responses.
The future of foliar spraying of amino acid mixtures holds promise for enhancing sustainable agriculture. Further research is essential for a deeper understanding of mechanisms involved in abiotic stress mitigation, biotic stress resistance, improved nutrient use efficiency (including synergistic effects, chelation, and bioavailability), reduced reliance on synthetic inputs, enhanced crop quality (nutritional content and organoleptic properties), integration with other bio-stimulants (combined formulations), and a comprehensive understanding of molecular mechanisms and the specific roles of amino acids. Therefore, new research on the long-term effects of VIUSID® agro on soil health, ecosystem balance, and crop quality is needed.

Author Contributions

Conceptualization, K.P.-C. and A.C.-H.; methodology, K.P.-C., J.F.M.-R. and J.C.R.-F.; software, O.G.G.-C. and M.T.G.-G.; validation, K.P.-C., L.M.-C. and A.J.-M.; formal analysis, K.P.-C. and A.C.-H.; research, K.P.-C., A.C.-H. and J.F.M.-R.; resources, K.P.-C. and A.C.-H.; data curation, K.P.-C. and L.M.-C.; Drafting: preparation of the original draft, K.P.-C.; writing: revision and editing, K.P.-C.; visualization, O.G.G.-C. and M.T.G.-G.; supervision, K.P.-C. and A.C.-H.; project management, K.P.-C.; acquisition of financing, K.P.-C. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by the project University, urban agriculture and rural communities: an interdisciplinary approach to promote food sovereignty and gender equality (AgroFuturo), grant number: NA223SS500-035, and the APC was funded by Catalysis S.A., Spain.

Data Availability Statement

The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.

Acknowledgments

The authors thank the institutional project AgroFuturo, grant number: NA223SS500-035 and the doctoral program Sustainable Agricultural and Industrial Processes (PAIS).

Conflicts of Interest

The authors declare no conflicts of interest.

Abbreviations

The following abbreviations are used in this manuscript:
ROSReactive oxygen species
NNitrogen
K+Potassium
Na+Sodium

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Figure 1. Keywords used in the literature search.
Figure 1. Keywords used in the literature search.
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Figure 2. Flowchart (PRISMA) of the research methodology.
Figure 2. Flowchart (PRISMA) of the research methodology.
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Figure 3. Analysis of publication hotspots regarding “VIUSID® agro”, “growth”, “productivity”, and “saline stress” in the last 10 years. The size of each point represents the focal weight of each keyword in the literature, and the lines between two points indicate their coupling relationships.
Figure 3. Analysis of publication hotspots regarding “VIUSID® agro”, “growth”, “productivity”, and “saline stress” in the last 10 years. The size of each point represents the focal weight of each keyword in the literature, and the lines between two points indicate their coupling relationships.
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Figure 4. Research distribution by year and crop group.
Figure 4. Research distribution by year and crop group.
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MDPI and ACS Style

Peña-Calzada, K.; Calero-Hurtado, A.; Meléndrez-Rodríguez, J.F.; Rodríguez-Fernández, J.C.; Gutiérrez-Cádenas, O.G.; García-González, M.T.; Madrigal-Carmona, L.; Jiménez-Medina, A. Impacts of the Biostimulant VIUSID® Agro on Growth, Productivity, and Tolerance to Salt Stress in Crops: A Systematic Review. Horticulturae 2025, 11, 407. https://doi.org/10.3390/horticulturae11040407

AMA Style

Peña-Calzada K, Calero-Hurtado A, Meléndrez-Rodríguez JF, Rodríguez-Fernández JC, Gutiérrez-Cádenas OG, García-González MT, Madrigal-Carmona L, Jiménez-Medina A. Impacts of the Biostimulant VIUSID® Agro on Growth, Productivity, and Tolerance to Salt Stress in Crops: A Systematic Review. Horticulturae. 2025; 11(4):407. https://doi.org/10.3390/horticulturae11040407

Chicago/Turabian Style

Peña-Calzada, Kolima, Alexander Calero-Hurtado, Jorge Félix Meléndrez-Rodríguez, Juan Carlos Rodríguez-Fernández, Oscar Giovanni Gutiérrez-Cádenas, Marcos Tulio García-González, Lourdes Madrigal-Carmona, and Alay Jiménez-Medina. 2025. "Impacts of the Biostimulant VIUSID® Agro on Growth, Productivity, and Tolerance to Salt Stress in Crops: A Systematic Review" Horticulturae 11, no. 4: 407. https://doi.org/10.3390/horticulturae11040407

APA Style

Peña-Calzada, K., Calero-Hurtado, A., Meléndrez-Rodríguez, J. F., Rodríguez-Fernández, J. C., Gutiérrez-Cádenas, O. G., García-González, M. T., Madrigal-Carmona, L., & Jiménez-Medina, A. (2025). Impacts of the Biostimulant VIUSID® Agro on Growth, Productivity, and Tolerance to Salt Stress in Crops: A Systematic Review. Horticulturae, 11(4), 407. https://doi.org/10.3390/horticulturae11040407

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