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Antioxidants
Special Issues
Oxidative Stress in Plant Stress and Plant Physiology
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Oxidative Stress in Plant Stress and Plant Physiology

A special issue of Antioxidants (ISSN 2076-3921). This special issue belongs to the section "ROS, RNS and RSS".

Deadline for manuscript submissions: 30 May 2026 | Viewed by 5104

Special Issue Editor

Dr. Mohsin Tanveer

E-Mail Website
Guest Editor
1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
2. Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia
Interests: ROS signaling; stress adaptive responses; plant growth; ionic homeostasis; ROS scavenging
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Oxidative stress, driven by reactive oxygen species (ROS), plays a dual role in plant stress responses, acting as both a damaging agent and a key signaling molecule. This Special Issue explores the intricate mechanisms of ROS signaling in plant stress adaptation, focusing on how plants maintain redox homeostasis under diverse stressors, including biotic, abiotic, soil-borne, and air pollutants. A comparative analysis of halophyte vs. glycophyte species or tolerant and sensitive plant species will shed light on evolutionary adaptations to oxidative stress, while molecular crosstalk with ROS signaling will highlight interactions between hormonal, metabolic, and genetic pathways. We invite contributions investigating stress-induced adaptive responses, antioxidant defense systems, and the role of ROS in cellular communication. Studies employing advanced omics, imaging, and redox biology techniques are particularly encouraged. Further studies related to exogenous applications of plant growth regulators and hormones in the context of oxidative stress tolerance in plants are also welcome. By bridging physiological, biochemical, and molecular perspectives, this issue aims to uncover novel strategies for enhancing crop resilience in changing environments. Researchers are invited to submit original research, reviews, and methodological advances that deepen our understanding of oxidative stress in plant systems, offering potential applications in sustainable agriculture and environmental stress mitigation.

Dr. Mohsin Tanveer
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Antioxidants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ROS signaling
  • stress adaptive responses
  • halophyte vs glycophyte
  • redox homeostasis
  • molecular crosstalk with ROS signaling
  • biotic, abiotic, soil borne, and air pollutants

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Published Papers (4 papers)

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Research

19 pages, 3396 KB  
Article
Functional Analysis of LTS-PYL in Modulating Plant Drought Responses
by Rahmatullah Jan, Sajjad Asaf, Saleem Asif, Zakirullah Khan, Lubna, Eman R. Elsharkawy, Syed Abdullah Gilani and Kyung-Min Kim
Antioxidants 2026, 15(2), 178; https://doi.org/10.3390/antiox15020178 - 30 Jan 2026
Viewed by 715
Abstract
Drought severely limits plant productivity, and understanding its regulatory mechanisms remains essential. Here, we characterize Lipid Transport Superfamily-Polyketide cyclase/dehydrase (LTS-PYL), a PYR/PYL/RCAR-domain gene, using Arabidopsis overexpression and CRISPR-Cas9 genome-edited lines to elucidate its role in drought adaptation. LTS-PYL overexpression enhanced early [...] Read more.
Drought severely limits plant productivity, and understanding its regulatory mechanisms remains essential. Here, we characterize Lipid Transport Superfamily-Polyketide cyclase/dehydrase (LTS-PYL), a PYR/PYL/RCAR-domain gene, using Arabidopsis overexpression and CRISPR-Cas9 genome-edited lines to elucidate its role in drought adaptation. LTS-PYL overexpression enhanced early seedling growth, increasing root length (RL) by 40% and 31%, whereas genome-edited lines exhibited severe defects, including 42%, 28% reductions in fresh weight and 63%, 50% decreases in root length relative to WT-T. Under drought stress, overexpression lines displayed strong growth and reproductive resilience, with shoot length (SL) increased by up to 80%, silique length (Sil L) by 61%, and seed number doubled compared with WT-T. In contrast, genome-edited lines showed marked reductions in these traits, confirming their drought sensitivity. LTS-PYL overexpression strongly suppressed oxidative stress, reducing H2O2 by 74% and 68% and O2−· by 39% and 38%, while increasing relative water content (RWC) by 42% and 39%. Genome-edited lines exhibited elevated (H2O2, O2−·) and up to 33% lower RWC. Antioxidant capacity was also strengthened in overexpression plants, with catalase (CAT) and peroxidase (POD) activities increasing by 138%, 168% and 62%, 148%, and malondialdehyde (MDA) and electrolyte leakage (EL) reduced by 23%, 37%, relative to WT-T. Conversely, genome-edited lines showed weakened antioxidant defenses and higher membrane damage. Transcriptionally, overexpression activated drought-responsive genes, elevating LTS-PYL (604%, 472%), DREB2A (227%, 200%), and ABA levels (48%, 34%), whereas genome-edited lines showed strongly reduced expression and ABA decreases of 66%, 62%. Additionally, LTS-PYL enhanced osmotic adjustment, increasing proline (58%, 53%), sugars (37%, 46%), and sucrose (111%, 100%), while limiting chlorophyll (Chl) loss to 9%, 20%. Genome-edited lines exhibited reduced osmolytes and severe chlorophyll decline. Overall, LTS-PYL acts as a strong positive regulator of drought tolerance, integrating ABA signaling, osmotic adjustment, ROS detoxification, and transcriptional activation. Full article
(This article belongs to the Special Issue Oxidative Stress in Plant Stress and Plant Physiology)
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21 pages, 6405 KB  
Article
Methyl Jasmonate Orchestrates Multi-Pathway Antioxidant Defense to Enhance Salt Stress Tolerance in Walnut (Juglans regia L.)
by Ruining Nie, Chengxu Wu, Xinying Ji, Ao Li, Xu Zheng, Jiajia Tang, Leyuan Sun, Yi Su and Junpei Zhang
Antioxidants 2025, 14(8), 974; https://doi.org/10.3390/antiox14080974 - 8 Aug 2025
Cited by 5 | Viewed by 1375
Abstract
Walnut (Juglans regia L.), an ecologically and economically important species, requires the elucidation of its salt stress response mechanisms for improved salt tolerance breeding. This study elucidates the physiological and molecular mechanisms through which exogenous methyl jasmonate (MeJA) mitigates salt stress in [...] Read more.
Walnut (Juglans regia L.), an ecologically and economically important species, requires the elucidation of its salt stress response mechanisms for improved salt tolerance breeding. This study elucidates the physiological and molecular mechanisms through which exogenous methyl jasmonate (MeJA) mitigates salt stress in walnut, providing novel strategies for salt-tolerant cultivar development. This integrated study combined physiological, biochemical, and multi-omics analyses to decipher how exogenous MeJA enhances ROS scavenging through the synergistic activation of phenylalanine (Phe), tryptophan (Trp), and α-linolenic acid pathways, establishing a multilevel antioxidant defense network. MeJA treatment effectively mitigated salt stress-induced oxidative damage, as demonstrated by a significant 16.83% reduction in malondialdehyde (MDA) content, concurrent 11.60%, 10.73% and 22.25% increases in superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activities, respectively, the elevation of osmoregulatory soluble sugars (SS), and 1.2- to 2.0-fold upregulation of key antioxidant enzyme genes (SOD, POD, APX, GPX, DHAR) and elevated osmoregulatory substances (soluble sugars, SS). Improved photosynthetic parameters (Pn, Gs) and chlorophyll fluorescence efficiency (Fv/Fm) collectively indicated reduced oxidative stress (improved by 7.97–23.71%). Joint metabolomic-transcriptomic analyses revealed MeJA-enhanced ROS scavenging via the coordinated regulation of Phe, Trp, and α-linolenic acid pathways. In summary, MeJA significantly enhanced reactive oxygen species (ROS) scavenging efficiency and comprehensive antioxidant capacity in walnut seedlings through the synergistic regulation of key metabolic pathways, effectively mitigating salt stress. These findings establish a crucial mechanistic foundation for understanding plant salt stress responses and advance the utilization of MeJA-mediated strategies for the genetic improvement of salinity tolerance in walnut. Future research should prioritize optimizing MeJA application protocols and functionally validating key regulatory genes for breeding applications. Full article
(This article belongs to the Special Issue Oxidative Stress in Plant Stress and Plant Physiology)
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16 pages, 2073 KB  
Article
Physiological Mechanisms of the Enhanced UV-B Radiation Triggering Plant-Specific Peroxidase-Mediated Antioxidant Defences
by Yijia Gao, Ling Wei, Chenyu Jiang, Shaopu Shi, Jiabing Jiao, Hassam Tahir, Minjie Qian and Kaibing Zhou
Antioxidants 2025, 14(8), 957; https://doi.org/10.3390/antiox14080957 - 4 Aug 2025
Viewed by 1245
Abstract
In this study, an artificially simulated enhanced UV-B radiation treatment of 96 kJ/m2·d−1 was applied with natural sunlight as the control. By observing changes in biological tissue damage, peroxidase (POD) enzyme activity, and hormone content, combined with transcriptome analysis and [...] Read more.
In this study, an artificially simulated enhanced UV-B radiation treatment of 96 kJ/m2·d−1 was applied with natural sunlight as the control. By observing changes in biological tissue damage, peroxidase (POD) enzyme activity, and hormone content, combined with transcriptome analysis and quantitative fluorescence PCR validation, this study preliminarily elucidated the physiological mechanisms of plant-specific peroxidase (POD) in responding to enhanced UV-B radiation stress. Enhanced UV-B treatment significantly inhibited biological tissue growth, particularly during the rapid growth stage. At this stage, the treatment exhibited higher malondialdehyde (MDA) content, indicating increased oxidative stress due to the accumulation of reactive oxygen species (ROS). Despite the inhibition in growth, the treatment showed improvements in the accumulation of organic nutrients as well as the contents of abscisic acid (ABA), salicylic acid (SA), and methyl jasmonate (MeJA). Additionally, an increase in POD activity and lignin content was observed in the treatment, especially during the middle period of the rapid growth period. Transcriptome analysis revealed that two POD multigene family members, LOC123198833 and LOC123225298, were significantly upregulated under enhanced UV-B radiation, which was further validated through qPCR. In general, enhanced UV-B radiation triggered a defence response in biological tissue by upregulating POD genes, which can effectively help to scavenge excess ROS. Full article
(This article belongs to the Special Issue Oxidative Stress in Plant Stress and Plant Physiology)
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18 pages, 2510 KB  
Article
The Glutathione Peroxidase Gene Family in Chenopodium quinoa: Genome-Wide Identification, Classification, Gene Expression and Functional Analysis
by Jing Yang, Anna Xu, Kexin An, Lilong Wang, Taiping Luo, Xinyue Yu, Haibo Yin, Shanli Guo and Xia Zhang
Antioxidants 2025, 14(8), 940; https://doi.org/10.3390/antiox14080940 - 30 Jul 2025
Cited by 1 | Viewed by 1215
Abstract
Glutathione peroxidase (GPX) is crucial in mediating plant responses to abiotic stresses. In this study, bioinformatics methods were used to identify the GPX gene family in quinoa. A total of 15 CqGPX genes were identified at the quinoa genome level and conducted preliminary [...] Read more.
Glutathione peroxidase (GPX) is crucial in mediating plant responses to abiotic stresses. In this study, bioinformatics methods were used to identify the GPX gene family in quinoa. A total of 15 CqGPX genes were identified at the quinoa genome level and conducted preliminary analysis on their protein characteristics, chromosome distribution, gene structure, conserved domain structure, cis-acting elements, and expression patterns. Phylogenetic analysis showed that the GPX genes of quinoa, Arabidopsis, soybean, rice, and maize were divided into three groups. Most of the CqGPXs had the three characteristic conserved motifs and other conserved sequences and amino acid residues. Six types of cis-acting elements were identified in the CqGPX gene promoter, with stress and hormone response-related cis-acting elements constituting the two main categories. Additionally, the expression patterns of CqGPX genes across various tissues and their responses to treatments with NaCl, PEG, CdCl2, and H2O2 were also investigated. The qRT-PCR results showed significant differences in the expression levels of the CqGPX genes under stress treatment at different time points. Consistently, the activity of glutathione peroxidase enzymes increased under stresses. Heterologous expression of CqGPX4 and CqGPX15 conferred stress tolerance to E. coli. This study will provide a reference for exploring the function of CqGPX genes. Full article
(This article belongs to the Special Issue Oxidative Stress in Plant Stress and Plant Physiology)
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