Tolerance of Horticultural Plants to Abiotic Stresses

A special issue of Horticulturae (ISSN 2311-7524). This special issue belongs to the section "Biotic and Abiotic Stress".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 2666

Special Issue Editors


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Guest Editor
Center for Agricultural, Environmental, and Biological Sciences, Federal University of Recôncavo of Bahia—UFRB, Campus Universitário, Cruz das Almas 44380-000, Brazil
Interests: plant physiology; abiotic stresses; salt and droght stress tolerance; phytohormones; antioxidant system enzymes; reactive oxygen species; biostimulants; horticulture; vegetables; edible flowers

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Guest Editor
Department of Biodiversity, Institute of Biosciences, São Paulo State University-UNESP, Av. 24A, 1515, Rio Claro 13506-900, São Paulo, Brazil
Interests: abiotic stresses; salinity; physiological and biochemical changes in plants; salt stress tolerance; reactive oxygen species (ROS); ion homeostasis; ion toxicity; agricultural challenges in arid and semi-arid regions
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Special Issue Information

Dear Colleagues,

The capacity of horticultural plants to endure abiotic stresses, such as drought, salinity, extreme temperatures, and heavy metal contamination, is vital for sustaining growth and optimizing productivity. These stressors trigger profound physiological and metabolic alterations that adversely affect plant development, yield, and quality. Central tolerance mechanisms, including osmoprotectant accumulation, heightened antioxidant enzyme activity, and ion transport regulation, serve to alleviate stress-induced damage. Moreover, plant hormones, fertilizers, and biostimulants are instrumental in enhancing stress resilience. Recent advances in genomics and metabolomics provide promising strategies for breeding and cultivating stress-tolerant horticultural crops. Investigating the physiological, molecular, and genetic responses of plants to abiotic stresses is imperative for fortifying their resilience and ensuring sustainable productivity. Given the increasing frequency of extreme conditions such as drought, heat, and salinity due to climate change, research in horticultural plant stress tolerance is indispensable for developing resilient crops, safeguarding food security, and advancing sustainable agricultural practices in an evolving environment.

Dr. Toshik Iarley Da Silva
Dr. Alexandre Maniçoba da Rosa Ferraz Jardim
Guest Editors

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Keywords

  • climate changes
  • physiological and biochemical changes in plants
  • stress signaling
  • plant hormones
  • biostimulants
  • breeding

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Published Papers (3 papers)

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Research

14 pages, 1692 KiB  
Article
Seed Priming with PEG 6000 and Silicic Acid Enhances Drought Tolerance in Cowpea by Modulating Physiological Responses
by Guilherme Félix Dias, Rayanne Silva de Alencar, Priscylla Marques de Oliveira Viana, Igor Eneas Cavalcante, Emmanuelly Silva Dias de Farias, Semako Ibrahim Bonou, Jonnathan Richeds da Silva Sales, Hermes Alves de Almeida, Rener Luciano de Souza Ferraz, Claudivan Feitosa de Lacerda, Sérgio de Faria Lopes and Alberto Soares de Melo
Horticulturae 2025, 11(4), 438; https://doi.org/10.3390/horticulturae11040438 - 19 Apr 2025
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Abstract
Cowpea is a nutritionally and economically valuable legume, known for its adaptability to adverse conditions. However, water stress negatively affects its development, requiring technologies to enhance resilience. This study aimed to induce tolerance to water deficit in cowpea through seed priming with polyethylene [...] Read more.
Cowpea is a nutritionally and economically valuable legume, known for its adaptability to adverse conditions. However, water stress negatively affects its development, requiring technologies to enhance resilience. This study aimed to induce tolerance to water deficit in cowpea through seed priming with polyethylene glycol 6000 (PEG 6000) and silicic acid. A completely randomized experiment was conducted in a phytotron chamber with two water regimes (W50 and W100) and six seed priming treatments, with four replications. Priming consisted of three water potentials induced by PEG 6000 (0 MPa, −0.4 MPa, and −0.8 MPa) and two silicon concentrations (0 and 200 mg L−1). Gas exchange parameters, including photosynthetic rate (A), transpiration rate (E), stomatal conductance (gs), intercellular CO2 concentration (Ci), instantaneous water use efficiency (WUEi), and instantaneous carboxylation efficiency (iCE), were evaluated. Seed priming with PEG 6000 and silicon improved A, WUEi, and iCE under water deficit. Treatments 2 (0 MPa + 200 mg L−1 Si), 3 (−0.4 MPa + 0 mg L−1 Si), and 4 (−0.4 MPa + 200 mg L−1 Si) enhanced gas exchange, suggesting an effective strategy for improving drought tolerance in cowpea and ensuring food security. Full article
(This article belongs to the Special Issue Tolerance of Horticultural Plants to Abiotic Stresses)
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16 pages, 5061 KiB  
Article
Genome-Wide Identification of the CIPK Gene Family in Jasmine and Expression Analysis Under Salt Stress
by Shuang Zhang, Xin Huang, Lili Yin, Jiawei Li, Jiacan Xu and Ruigang Wu
Horticulturae 2025, 11(1), 40; https://doi.org/10.3390/horticulturae11010040 - 4 Jan 2025
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Abstract
Various CBL-interacting protein kinases (CIPKs) are involved in abiotic stress responses in plants. Despite the economic importance of jasmine (Jasminum sambac L. Aiton) and the availability of genome data, there are few reports analyzing the CIPK gene family. In this study, genome-wide [...] Read more.
Various CBL-interacting protein kinases (CIPKs) are involved in abiotic stress responses in plants. Despite the economic importance of jasmine (Jasminum sambac L. Aiton) and the availability of genome data, there are few reports analyzing the CIPK gene family. In this study, genome-wide identification of the CIPK gene family in jasmine was conducted, which would provide valuable information for the function analysis of JsCIPKs regarding participation in growth and development and response to salt stress. In the present study, a total of 17 CIPKs were identified, which were unevenly distributed on eight chromosomes. The JsCIPK protein sequences contained 311–781 amino acids, with a molecular weight of 35.05–87.58 kDa. Phylogenetic analysis revealed that the 17 JsCIPKs could be divided into five classical branches. JsCIPK genes with higher homology showed greater similarity between conserved protein motifs. Collinearity analysis demonstrated that 13 gene pairs in Arabidopsis were collinear with the jasmine sequences. Various hormone-related response- and stress-induced elements were observed in the promoter region of JsCIPK genes, such as TC-rich repeats, CARE, etc. Furthermore, the expression of JsCIPK genes varied in different organs. Finally, the expression analyses of eight JsCIPKs under salt stress were performed. A systematic analysis of the CIPK gene family and the effect of salt stress on the expression of eight JsCIPK genes in leaves of jasmine was carried out. The expression of JsCIPK6 and JsCIPK8 was significantly down-regulated and up-regulated by salt treatment, respectively. These findings would lay a foundation for future functional studies of these two genes in jasmine related to salt stress and provide useful resistance genes for the molecular breeding of new varieties of salt-tolerant jasmine. Full article
(This article belongs to the Special Issue Tolerance of Horticultural Plants to Abiotic Stresses)
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17 pages, 2332 KiB  
Article
The Role of Brassinosteroids and Nano-Encapsulated Brassinosteroids in Capsicum Pepper Growth and Physiological Adaptations to High-Temperature Stress
by Behnaz Halaji, Maryam Haghighi, Gergő Péter Kovács, Iman Mirmazloum and Anita Szegő
Horticulturae 2024, 10(10), 1062; https://doi.org/10.3390/horticulturae10101062 - 4 Oct 2024
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Abstract
Much is unknown about the positive effect of plant growth regulators, such as brassinosteroids, on high-temperature stress tolerance in pepper plants. This study aimed to reveal the effect of exogenous brassinosteroids (BRs) on high-temperature-stressed bell peppers by foliar application. BR treatments (1 µM), [...] Read more.
Much is unknown about the positive effect of plant growth regulators, such as brassinosteroids, on high-temperature stress tolerance in pepper plants. This study aimed to reveal the effect of exogenous brassinosteroids (BRs) on high-temperature-stressed bell peppers by foliar application. BR treatments (1 µM), in both bulk (Br) and nano-encapsulated (N-Br) forms, were applied to pepper plants subjected to high-temperature stress (35 °C). The results indicated an increase in plant biomass, number of fruits, and relative water content and a significantly lower flower abscission in response to Br and N-Br under high temperatures. Br and N-Br applications at high temperatures resulted in the lowest leaf water potential. Br and N-Br, especially N-Br, were more effective than Br in the upregulation of the antioxidant enzyme activity, such as catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), and the overall antioxidant capacity of heat-stressed plants. MDA and electrolyte leakage significantly declined as a result of BR application and the proline content of the leaves was significantly higher in Br and N-Br treatments at high temperatures. Further analysis of the data pointed to SOD, DPPH, proline, RWC, and leaf water potential in pepper leaves as the most affected traits in response to brassinosteroid application under high temperature. Glucose and fructose levels also increased under high temperature, and only N-Br administration showed a significant effect on reducing the sugar levels. At high temperatures, the ratio of saturated to unsaturated fatty acids was greatest when neither Br nor N-Br was present. N-Br could reduce this ratio effectively. Conclusively, the overall performance of bell pepper improved in response to both types of BR application with no significant discrimination being found to prioritize the encapsulated form of BR application. Full article
(This article belongs to the Special Issue Tolerance of Horticultural Plants to Abiotic Stresses)
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