Search Results (753)

To meet consumer expectations for larger litchi fruits and better postharvest storage quality, this study assessed the effects of preharvest chitosan application on litchi fruit size, weight, postharvest quality and storage performance. Litchi fruits were sprayed with a commercial aqueous chitosan formulation (Kadozan) in five different concentrations, namely, 1:250 (V_Kadozan: V_{Kadozan + Water}), 1:500, 1:750, 1:1000 and 0:1000 (control), at 45, 55, and 65 days after full blossom (AFB), and then harvested at commercial maturity (90 days AFB). After harvest, the fruit were cleaned, air-dried, packaged, and subsequently stored at room temperature (25 ± 1 °C). The results revealed that preharvest Kadozan treatment produced heavier and larger fruits with higher vitamin C at harvest. During storage, it delayed the decline in total soluble solids, soluble sugars, and vitamin C in the aril while preserving higher pericarp anthocyanin, chlorophyll, carotenoid, and flavonoid contents. Kadozan treatment also reduced respiration rate, weight loss, and cell membrane permeability, increased total phenolics and decreased polyphenol oxidase activity, leading to a lower browning index. Notably, it enhanced lignin, upregulated phenylalanine ammonia-lyase, chitinase and β-1,3-glucanase activities, and accordingly suppressed disease development and improved marketable fruit rate. In conclusion, among the tested treatments, the 1:750 Kadozan application was the most effective in improving fruit quality at harvest, delaying postharvest senescence, and enhancing storage performance, thus offering a practical strategy for both preharvest quality improvement and postharvest quality maintenance of litchi fruits. Full article

Damping-off disease caused by Rhizoctonia solani is a devastating soilborne disease that poses a serious threat to sustainable ginseng (Panax ginseng) production. In an effort to develop environmentally friendly control alternatives, we investigated the volatile constituents of Asarum heterotropoides essential oil using GC-MS in 2023 and identified methyleugenol as the predominant bioactive component, accounting for 21.32% of the total volatile fraction. Mycelial growth rate assays demonstrated that methyleugenol exerted pronounced antifungal activity against R. solani, with EC₅₀ and EC₉₀ values of 60 mg/L and 800 mg/L, respectively. Treatment at 0.1 mg/mL resulted in 51% growth inhibition after 4 days of incubation. To elucidate the underlying mechanisms of action, R. solani mycelia exposed to 0.1 mg/mL methyleugenol were harvested at 4 and 6 days post-treatment for integrated transcriptomic and untargeted metabolomic profiling. Transcriptome analysis revealed 1444 and 1157 significantly downregulated genes at 4 and 6 days, respectively, with 836 genes consistently repressed at both time points. GO and KEGG enrichment analyses indicated that these persistently suppressed genes were predominantly associated with protein processing in the endoplasmic reticulum, protein export, tyrosine metabolism, and peroxisome biogenesis. Metabolomic profiling identified 95 differentially accumulated metabolites that were commonly reduced across both time points, with KEGG pathway enrichment highlighting significant suppression of starch and sucrose metabolism and galactose metabolism pathways central to carbon source utilization. Integrative transcriptome–metabolome correlation analysis further uncovered three key transcription factors (gene-RDB_LOCUS74145, gene-RDB_LOCUS26344, and gene-RDB_LOCUS52181) implicated in the regulation of carbohydrate metabolism and tricarboxylic acid cycle-related metabolite production. Collectively, our findings indicate that methyleugenol suppresses R. solani growth through a multi-target mechanism involving impairment of carbon source metabolism, disruption of protein processing and secretion, and attenuation of cellular energy supply. These results provide a mechanistic foundation for the development of botanical fungicide-based strategies for the green management of ginseng damping-off disease. Full article

Pre-storage fruit injuries are a major yet often underestimated cause of postharvest losses in apples, particularly during prolonged cold storage. This study evaluated the impact of minor pre-storage injuries on fruit deterioration and assessed the effectiveness of ammonium bicarbonate (2%) and clove bud essential oil (0.2%) as eco-friendly postharvest treatments compared with the fungicide fludioxonil (Scholar). Fresh red and yellow apples were classified as either intact fruit or fruit bearing minor injuries affecting less than 2% of the surface area (approximately 2 mm lesions). Treatments were applied by spraying before storage at 5 °C for six months, followed by 10 days of shelf life at 20 °C. Minor injuries significantly increased postharvest decay, weight loss, and quality deterioration in both cultivars. Injured yellow apples exhibited decay incidence of 17–24% and disease severity of 10.5–17.8%, whereas the more susceptible red apples showed decay incidence of 44.6–60% and disease severity of up to 50%. In contrast, non-injured fruit maintained better physicochemical quality and generally exhibited less than 5% decay incidence. Responses to storage and treatments differed between cultivars. Ammonium bicarbonate effectively reduced decay and helped maintain firmness in yellow apples, providing protection comparable to that of fludioxonil, whereas Scholar was the most effective treatment for reducing decay in red apples. Clove essential oil reduced disease development in non-injured fruit but showed limited effects on firmness preservation. The residual activity of fludioxonil remained detectable after prolonged storage, as demonstrated by inoculation assays performed after storage. The results demonstrate that fruit integrity at harvest is a critical determinant of successful long-term storage and that the benefits of postharvest treatments are substantially reduced when fruit are mechanically injured. Preventive treatment of uninjured fruit with ammonium bicarbonate or Scholar can significantly reduce postharvest losses, while careful handling and sorting to eliminate injured fruit remain essential components of sustainable apple storage management. Full article

With growing global recognition of the nutritional value of blueberries, their cultivation has expanded significantly across various regions. However, gray mold disease, caused by Botrytis cinerea, remains a major challenge in postharvest storage and transportation. In this study, two strains—Trichoderma asperellum BBR–A and B. cinerea BC7–1—were isolated and identified from the blueberry rhizosphere and diseased leaves. Co-culture assays demonstrated that BBR–A exhibits potent antagonistic activity, rapidly suppressing the growth of the pathogen BC7–1 through mycoparasitic behaviors, including hyphal coiling, penetration, and degradation. Transcriptomic analysis revealed that upon interaction with BC7–1, BBR–A undergoes extensive reprogramming of carbon metabolism, with coordinated upregulation of genes encoding degradative enzymes, transporters, and stress-related proteins. Congo red staining and enzymatic activity assays further confirmed the enhanced secretion of extracellular enzymes and the increased cell wall-degrading capacity of BBR–A. On detached blueberry leaves, seedlings, and fruits, BBR–A treatment significantly delayed lesion expansion and reduced disease severity. Metabolomic profiling further demonstrated that BBR–A induces the marked accumulation of phenolic compounds, polyamines, and other antioxidant- and immunity-related metabolites in blueberry leaves, thereby maintaining host redox homeostasis and enhancing stress resilience. Collectively, these findings indicate that T. asperellum BBR–A effectively suppresses B. cinerea through multiple mechanisms, including antagonism, mycoparasitism, metabolic regulation, and the induction of plant defense responses, highlighting its strong potential for development as a biocontrol agent against blueberry gray mold. Full article

Potato is a globally important staple, but postharvest diseases such as dry rot, caused by Fusarium spp., threaten production and lead to major economic losses and food safety risks. Limited resistant cultivars highlight the need for phenotypic screening and integration with genomic tools to improve resistance and breeding efficiency. A total of 336 potato genotypes, including 295 commercial varieties and 41 breeding clones, were evaluated under post-harvest conditions following artificial inoculation. Tubers were inoculated with Fusarium sambucinum, and lesion penetration measured to classify susceptibility. Overall, this study provides one of the most comprehensive phenotypic evaluations of dry rot resistance in potato germplasm to date. While no variety was fully resistant, the identification of both moderately susceptible and highly susceptible cultivars offers valuable insights for breeding programs and contributes to the development of more resilient potato production and storage systems. In addition, this phenotypic screening can be integrated with genomic tools to accelerate breeding for improved resistance and postharvest performance. Full article

Black spot disease caused by Ceratocystis fimbriata (C. fimbriata) is a severe postharvest disease of sweet potatoes. This study evaluated the biocontrol potential of Bacillus velezensis (B. velezensis) L33a against this pathogen. Confrontation assays showed that L33a inhibited mycelial growth by 82.83%. FDA/PI staining and scanning electron microscopy revealed that L33a disrupted cell membrane integrity and caused severe mycelial deformation. Co-culture experiments indicated that L33a altered the expression of key pathogenic genes in C. fimbriata. Volatile organic compounds (VOCs) from L33a inhibited the pathogen by 77.78%, outperforming cell-free supernatant (CFS). VOCs primarily suppressed spore germination, with phenylethanol (PEA) and octanoic acid achieving 100% inhibition. In planta tests on sweet potato tubers showed that both L33a culture and VOCs significantly reduced lesion expansion. Using qPCR analysis, we found that L33a activated defense-related genes in tissues around wounds, particularly those involved in the jasmonic acid (JA) signaling pathway. In summary, B. velezensis L33a effectively controls sweet potato black rot through multiple mechanisms: direct antifungal activity, inhibition of spore germination, modulation of pathogen gene expression, and induction of host defense responses. It represents a promising natural inhibitor for postharvest disease management. Full article

Potato dry rot, induced by pathogenic Fusarium species, is a prevalent postharvest fungal disease that leads to significant economic losses. This research illustrates the biocontrol efficacy of Bacillus velezensis strain 2-1-9-CJK-2 against potato dry rot. The strain successfully inhibited disease progression, diminished oxidative damage in potato tubers, and augmented the activity of essential defense-related enzymes. It effectively colonized potato tubers and sustained consistent inhibitory activity under diverse environmental challenges. And its cell-free supernatant (CFS) retained consistent inhibitory activity. The crude lipopeptides (CLs) produced by this strain induced hyphal deformation, fragmentation, and cytoplasmic leakage in Fusarium solani. Transmission electron microscopy (TEM) further revealed that CL treatments triggered organelle degradation in the pathogen, with mitochondrial disintegration being particularly prominent. Transcriptomic analysis indicated that CLs upregulated genes linked to mitochondrial autophagy in the pathogen and stimulated plant defense mechanisms, notably the MAPK signaling cascade, in potatoes. The findings were additionally corroborated by qRT-PCR. B. velezensis strain 2-1-9-CJK-2 is a promising biocontrol agent and a great resource for the development of antifungal formulations to enhance sustainable potato production. Full article

Methyl jasmonate (MeJA) is a volatile phytohormone that regulates diverse physiological processes and mediates plant responses to various external stressors. Recently, MeJA has emerged as a promising postharvest alternative for the improvement of fruit quality. Here, we reviewed the research progress on the application of exogenous MeJA to postharvest fruits, focusing on its regulatory roles in regulating fruit ripening, improving postharvest fruit quality, alleviating postharvest chilling injury, and controlling postharvest diseases. The potential physiological and biochemical mechanisms mainly include: (1) inducing endogenous JA biosynthesis; (2) mediating JA signaling transduction; (3) enhancing antioxidant capacity; (4) inducing the defense system; (5) regulating sucrose metabolism; and (6) modulating energy metabolism. Additionally, a specific finding is the possible crosstalk of applications of MeJA and various phytohormones during postharvest fruit storage, which provides a new method and insight for the fruit quality industry. Full article

Potato (Solanum tuberosum L.) tuber dry rot caused by Fusarium spp. is a major postharvest disease responsible for significant storage losses worldwide. This study investigated Fusarium isolates recovered from symptomatic potato tubers collected in February 2025 from storage facilities in the Mascara region of Algeria. To our knowledge, this is the first regional characterization of Fusarium-associated dry rot in stored potato tubers from Mascara, Algeria. By integrating morphological characterization, quantitative pathogenicity assessment, and targeted molecular identification, the study examined the relationship between morphotype occurrence and disease-causing potential. A total of 118 purified Fusarium isolates were obtained from symptomatic potato tubers and grouped into 28 morphotypes based on cultural and morphological characteristics. One representative isolate from each morphotype was evaluated for pathogenicity on potato tubers of cv. ‘Arizona’ under controlled incubation conditions, and disease severity was quantified by image analysis. Of the 28 representative isolates tested, 15 induced dry rot symptoms, with marked differences in aggressiveness, whereas several isolates induced little or no necrosis under the conditions tested. Selected aggressive isolates were further analyzed using TEF1-α sequencing, which identified F14 as F. sambucinum and F171 as F. redolens, while F4 and F34 were identified to the F. oxysporum and F. solani species-complex level, respectively. Importantly, morphotype frequency did not necessarily reflect disease severity, as some of the most aggressive isolates belonged to less common morphotypes. These findings suggest that isolation frequency alone may not adequately reflect pathogenic importance and support the integration of occurrence data, pathogenicity testing, and molecular identification in the assessment of Fusarium-associated dry rot in potato storage systems. Full article

Cork oak (Quercus suber L.) forests play a crucial role in the Mediterranean region, providing essential ecological, social, and economic services. Increasing pressure from wildfires, pests, diseases, and climate change has led to a progressive decline of these ecosystems, making the development of innovative post-stripping management strategies urgent. This study evaluates the effectiveness of kaolin application on cork oak trees immediately after cork removal in a mixed forest in Sant Celoni (Barcelona, Spain). Short- and long-term physiological responses were assessed through stomatal conductance and chlorophyll fluorescence (OJIP test), while sap flux density (J_s) was continuously monitored over a four-month period (July–October 2023) using IoT-based TreeTalker® Cyber (Nature 4.0 s.r.l., Viterbo, Italy). Proximal vegetation indices (Normalized Difference Vegetation Index, NDVI; and Normalized Difference Red Edge, NDRE) were also evaluated but showed no significant differences among treatments (p > 0.05). Kaolin-treated trees (K) maintained significantly higher photosynthetic performance and stem water transport capacity compared to untreated stripped trees (nK), with effects persisting up to 140 days after stripping. These findings support kaolin application as a viable and low-cost tool for mitigating post-stripping physiological stress in cork oak forest management. Further research across multiple sites and consecutive harvesting cycles is recommended to fully assess its long-term implications for tree vitality and cork productivity. Full article

Postharvest diseases caused by fungal pathogens lead to significant economic losses in citrus production. The intensive use of synthetic fungicides has triggered the emergence of resistant strains and environmental contamination, emphasizing the need to search for sustainable alternatives. This study evaluated the antifungal efficacy of a strawberry leaf aqueous extract (SLE) against local isolates of citrus phytopathogens such as Penicillium digitatum and P. italicum (both fungicide−sensitive and fungicide−resistant) and Geotrichum citri-aurantii. In vitro assays showed complete inhibition of mycelial growth for all pathogens on potato dextrose agar plates supplemented with 0.05 g·mL⁻¹ SLE after 5 days at 24 °C. Furthermore, total inhibition of conidial germination and loss of viability were achieved at 0.1 g·mL⁻¹ following an 8 or 24 h exposure period respectively. To elucidate the underlying mode of action, membrane integrity and cellular ultrastructure were examined. SYTOX™ Green staining revealed increased membrane permeability, and transmission electron microscopy showed marked intracellular disorganization in SLE-treated conidia from all phytopathogens. These findings were further validated through in vivo assays using artificially inoculated lemons where a significant reduction in green mold incidence was demonstrated. Overall, SLE exhibited broad-spectrum efficacy against major citrus postharvest pathogens, effectively overcoming established fungicide resistance. Our results could position SLE as a promising biocontrol agent for sustainable fruit preservation. Full article

The topito pepper (Capsicum chinense) is a tropical fruit of economic and gastronomic importance in the Caribbean region, valued for its nutritional content. However, this fruit is susceptible to postharvest fungal diseases, including those caused by the phytopathogenic fungus Penicillium expansum, which can degrade fruit quality and pose a health risk due to the potential presence of mycotoxins such as patulin. In this context, we evaluated the protective effects of coatings with chitosan (CS), clove essential oil (CEO), and their combination (CS+CEO) on sweet peppers stored at 12 °C for 12 days after harvest. The results indicate that the film-forming solution exhibited an acidic pH (5.33–5.44), a density of ~1.0 g/cm³, and viscosities ranging from 2.75 to 32.9 cP. Furthermore, the results indicate that coatings with CS and CS+CEO significantly reduced weight loss, preserved firmness (19.12–30.40 N), and delayed ripening. At the same time, the coatings exhibited inhibitory effects on P. expansum and aerobic mesophiles. The CS+CEO combination demonstrated the greatest inhibitory effect, indicating that it is a sustainable and effective strategy for the postharvest preservation of sweet peppers, thereby enhancing their value, preservation, and food security in the Caribbean region. Full article

Salmonella remains one of the most critical zoonotic pathogens in the poultry sector, linked to animal disease, foodborne illness, and the global crisis of antimicrobial resistance (AMR). Poultry acts as a major reservoir, enabling Salmonella transmission from hatchery to retail products through horizontal, vertical, and environmental routes. Despite the use of biosecurity, vaccination, antibiotics, and chemical decontamination, effective and sustainable control across the poultry value chain remains difficult, particularly in the face of rising multidrug-resistant strains and growing consumer concerns over chemical residues. Bacteriophages (phages), viruses that selectively infect and lyse bacteria, have emerged as a promising biological alternative for Salmonella control. Although many studies have reported the effectiveness of phages against bacterial species, including Salmonella, in the poultry industry, reports on their full potential to combat antimicrobial-resistant Salmonella across the entire poultry value chain remain limited. Therefore, this review synthesizes current evidence on the application of phages throughout the poultry value chain, including on-farm interventions, processing plant decontamination, and food packaging and storage. Findings from the reviewed articles indicate over a 90% reduction in Salmonella spp. in poultry farms and post-harvest meat, along with lower mortality in phage-treated groups compared to untreated groups; however, these outcomes depend on several factors (e.g., phage strains, concentrations, application methods, and environmental conditions). Laboratory, pilot, and field studies consistently demonstrate that phage preparations, especially when formulated as cocktails or combined with complementary interventions, can achieve substantial reductions in Salmonella, including antibiotic-resistant serovars, in live birds, eggs, poultry environments, and meat products. Unlike antibiotics and chemical sanitizers, phages act with high specificity, preserving beneficial microbiota and maintaining the sensory and nutritional quality of poultry products. Their safety has been supported by toxicological and genomic assessments, and several phage-based products have obtained regulatory approval, including Generally Recognized as Safe (GRAS) status for food applications in the United States. By integrating efficacy, safety, regulatory, and practical deployment data, this review highlights bacteriophages as a scientifically validated and One Health–aligned tool capable of reducing Salmonella transmission from farm to fork across the poultry value chain, thereby laying the foundation for their future adoption in the poultry industry. Phage-based interventions offer a sustainable pathway to enhance food safety, limit antimicrobial resistance (AMR) dissemination, and strengthen consumer confidence in poultry products. However, the major limitation is the emergence of phage-resistant bacterial strains, as well as the potential involvement of some phages in the transfer of resistance and virulence genes, which could raise public concern. Nevertheless, the use of phage cocktails and whole-genome sequencing, involving tools such as ResFinder and virulence finder, can facilitate the selection of safe phages for application. Full article

Bio-based coatings enriched with essential oils (EOs) represent a promising alternative to synthetic preservatives to extend strawberries’ shelf-life. This study evaluated the effects of chitosan (CHT) formulations containing three selected EOs (Illicium verum, Citrus sinensis, and Citrus limon) on the volatile profile, sensory quality, and antifungal activity of strawberry fruits. Volatile emissions were characterized by Headspace Solid Phase Micro-Extraction/Gas Chromatography-Mass Spectrometry, while sensory properties were assessed using Quantitative Descriptive Analysis. Antifungal activity was evaluated both in vitro and in vivo against Botrytis cinerea. Chitosan alone slightly modified the volatile profile, while EO-enriched coatings induced marked and concentration-dependent changes, reflecting the chemical composition of the incorporated EOs. Among the tested formulations, CHT combined with 1% C. sinensis EO provided the best balance between preservation of the characteristic strawberry aroma and overall sensory acceptance. In vitro assays showed that EO volatiles, particularly from C. sinensis and I. verum, significantly inhibited fungal growth, while diffusible compounds were less effective. In vivo, EO-containing coatings reduced disease incidence and severity by approximately 50%. These findings highlight the potential of CHT–EO coatings as sustainable options for postharvest preservation, although optimization of EO type and concentration is crucial to balance sensory quality and antimicrobial efficacy. Full article

Proper handling during harvesting and subsequent postharvest management is essential to reduce losses in fruits and vegetables, particularly because these products remain metabolically active after harvest. Physiological processes such as respiration, transpiration, ethylene production, softening, physiological disorders, and postharvest diseases determine quality deterioration, shelf life, and marketability. However, these processes do not affect all commodities in the same way; for example, climacteric fruits are strongly influenced by ethylene during ripening, whereas non-climacteric fruits generally show lower ethylene production and different postharvest behavior. In Mexico, postharvest management is especially relevant because fruit and vegetable producers differ widely in terms of production scale, infrastructure, access to technology, financing capacity, and market destination. Producers with limited access to technology require practical and low-cost alternatives, while more technologically advanced producers may use specialized systems but still experience postharvest losses due to physiological deterioration, handling conditions, logistics, and market constraints. Therefore, this review summarizes the main postharvest physiological processes affecting fruits and vegetables and discusses their implications for knowledge transfer, technology adoption, and sustainability among local producers in Mexico. The review highlights that reducing postharvest losses requires commodity-specific management, continuous technical support, low-cost and locally adaptable technologies, and coordinated participation among researchers, extension personnel, producers, government institutions, industry, and market actors. Strengthening postharvest knowledge transfer to small and local producers is essential to reduce losses, improve marketability, and promote more sustainable fruit and vegetable systems in Mexico. Full article