Biochemical Responses of Horticultural Crops to Abiotic Stresses

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Horticultural Science and Ornamental Plants".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 487

Special Issue Editors


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Guest Editor
College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Interests: agricultural plant science; biotechnology; botany; environmental science; molecular biology

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Guest Editor
Mid-Florida Research and Education Center, Environmental Horticulture Department, University of Florida, 2725 S. Binion Road, Apopka, FL 32703, USA
Interests: bioremediation; environmental plant physiology; plant biotechnology; plant breeding; plant genetics; specialty crops
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Special Issue Information

Dear Colleagues,

Abiotic stresses such as drought, waterlogging, extreme temperatures, salinity, nutrient deficiency, agrochemical application, heavy metal toxicity, low and high light intensities, UV light, hypoxia, and pruning can significantly impede plant growth, development, and productivity. Horticultural plants are high-value crops, are grown in diverse environmental conditions, and often experience either individual or combined abiotic stresses. Plants have evolved a series of mechanisms to react to these stresses, such as biochemical responses. These include the activation of antioxidant enzymes, adjustments in water use and nutrient uptake, changes in photosynthetic parameters, the accumulation and degradation of phytochemicals such as antioxidants, osmolytes, and various secondary metabolites, the regulation of biosynthesis of carbohydrates, proteins, lipids, amino acids, and sugars, and alterations in cell wall architecture. These reactions lead to rebalancing cellular homeostasis and sustaining horticultural crop growth and development. However, our understanding of these responses is still limited, which requires further investigation. This Special Issue of Plants is intended to focus on the biochemical responses of horticultural crops to abiotic stresses. Both research and review manuscripts addressing abiotic stress-induced biochemical responses in horticultural crops are welcome.

Prof. Dr. Dongliang Qiu
Prof. Dr. Jianjun Chen
Guest Editors

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Keywords

  • horticultural plants
  • abiotic stress
  • biochemicals
  • metabolism
  • crop production

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Published Papers (1 paper)

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Research

21 pages, 3307 KiB  
Article
Genome-Wide Insights into Streptomyces Novel Species Qhu-G9 and Its Potential for Enhancing Salt Tolerance and Growth in Avena sativa L. and Onobrychis viciifolia Scop
by Xin Xiang, Xiaolan Ma, Hengxia Yin, Liang Chen, Jiao Li, Wenjing Li, Shuhan Zhang, Chenghang Sun and Benyin Zhang
Plants 2025, 14(14), 2135; https://doi.org/10.3390/plants14142135 - 10 Jul 2025
Viewed by 216
Abstract
With the increasing severity of global climate change and soil salinization, the development of microorganisms that enhance crop salt tolerance has become a critical focus of agricultural research. In this study, we explored the potential of a novel Streptomyces species Qhu-G9 as a [...] Read more.
With the increasing severity of global climate change and soil salinization, the development of microorganisms that enhance crop salt tolerance has become a critical focus of agricultural research. In this study, we explored the potential of a novel Streptomyces species Qhu-G9 as a plant growth-promoting rhizobacterium (PGPR) under salt stress conditions, employing whole-genome sequencing and functional annotation. The genomic analysis revealed that Qhu-G9 harbors various genes related to plant growth promotion, including those involved in phosphate solubilization, indole-3-acetic acid (IAA) biosynthesis, antioxidant activity, and nitrogen fixation. A total of 8528 coding genes were annotated in Qhu-G9, with a significant proportion related to cell metabolism, catalytic activity, and membrane transport, suggesting its broad growth-promoting potential. In vitro experiments demonstrated that Qhu-G9 exhibited strong iron siderophore production, IAA synthesis, phosphate solubilization, and 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity, all of which correlate with its plant growth-promoting capacity. Further plant growth trials revealed that Qhu-G9 significantly enhances the growth of Avena sativa and Onobrychis viciifolia seedlings under salt stress conditions, improving key physiological parameters, such as chlorophyll content, relative water content, and photosynthetic efficiency. Under salt stress conditions, inoculation with Qhu-G9 resulted in notable increases in total biomass, root length, and plant height. Biochemical analyses further confirmed that Qhu-G9 alleviates the oxidative damage induced by salt stress by boosting antioxidant enzyme activities, reducing peroxide levels, and promoting the accumulation of osmotic regulators. These findings suggest that Qhu-G9 holds great promise as a PGPR that not only promotes plant growth, but also enhances plant tolerance to salt stress; thus, it has significant agricultural potential. Full article
(This article belongs to the Special Issue Biochemical Responses of Horticultural Crops to Abiotic Stresses)
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