Physiological and Molecular Mechanisms of Plant Stress Tolerance: New Insights and Applications

A Special Issue of Plants (ISSN 2223-7747) belonging to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 30 June 2027 | Viewed by 749

Editor

Special Issue Information

Dear Colleagues,

Plants are frequently exposed to variable environmental stresses during their growth and development, which can be classified as either biological or abiotic stress. Abiotic stress, such as cold, drought, salt, heat, and nutrient deficiency, adversely affects plant growth, development, and productivity, while biotic stresses, such as bacteria, viruses, fungi, parasites, insects (beneficial and harmful), weeds, and cultivated or native plants, are a major focus of agricultural research due to the vast economic losses they inflict on cash crops.

Throughout evolution, plants have evolved complex self-regulation mechanisms to adapt to abiotic stress and biotic stresses, in which transcription factors play an irreplaceable role. Further, plant hormones act as signaling compounds that regulate crucial aspects of growth, development, and environmental stress response. They activate a multitude of signaling cascades to elicit a plant’s adaptive responses.

This Special Issue aims to provide a platform for recent advances in understanding plant stress tolerance. We welcome original research articles and reviews addressing, but not limited to, the following topics:

  • Stress signal perception and transduction pathways;
  • Phytohormone and ROS signaling in stress acclimation;
  • Regulation of stress-responsive genes, transcription factors, and epigenetics;
  • Physiological adjustments (osmoregulation, antioxidant defense, and photosynthesis);
  • Molecular breeding, genome editing, and omics approaches for stress tolerance;
  • Cross-talk between abiotic and biotic stress responses.

We believe this Special Issue will be of great value to researchers working to improve plant stress tolerance and to develop climate-resilient crops. We warmly welcome your contributions.

Prof. Dr. Deguo Han
Guest Editor

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Keywords

  • plant stress tolerance
  • stress signaling and regulation
  • physiological adaptation
  • molecular mechanisms
  • crop resilience

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Published Papers (1 paper)

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Research

24 pages, 32136 KB  
Article
Actinidia arguta AaMYB4 Confers Cold and Drought Tolerance Through Up-Regulating Antioxidant Capacity Associated with the ROS Scavenging
by Haotian Feng, Jincheng Wang, Qingyu Kang, Wanda Liu, Yu Wang, Xingguo Li, Wenhui Li and Deguo Han
Plants 2026, 15(16), 2426; https://doi.org/10.3390/plants15162426 - 9 Aug 2026
Viewed by 464
Abstract
Actinidia arguta possesses great commercial value as an economically important fruit crop, which accumulates abundant nutrients and bioactive components with medicinal potential. However, adverse abiotic environments, especially cold and drought stress, severely restrict its vegetative growth, reproductive development and fruit yield. Numerous studies [...] Read more.
Actinidia arguta possesses great commercial value as an economically important fruit crop, which accumulates abundant nutrients and bioactive components with medicinal potential. However, adverse abiotic environments, especially cold and drought stress, severely restrict its vegetative growth, reproductive development and fruit yield. Numerous studies have established MYB transcription factors as core regulators of plant abiotic stress adaptation. Here, we cloned AaMYB4 from A. arguta ‘Fenglü’ and systematically characterized its function in cold and drought tolerance. AaMYB4 encodes a 241-amino-acid R2R3-MYB protein localized to the nucleus, with highest expression in stems and young leaves. Its transcription is markedly induced by cold, drought and abscisic acid (ABA) within 24 h with a single peak expression pattern. Heterologous overexpression of AaMYB4 in Arabidopsis alleviated cold-induced oxidative damage, accompanied by reduced malondialdehyde (MDA) and reactive oxygen species (ROS) accumulation as well as increased proline contents and enhanced superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activities. Virus-induced gene silencing (VIGS)-mediated silencing of AaMYB4 impaired cold tolerance in Actinidia arguta seedlings, while stable AaMYB4 overexpression significantly improved plant survival and physiological performance under cold and drought conditions, concurrent with attenuated ROS accumulation. At the transcriptional level, AaMYB4 overexpression is positively associated with elevated transcript levels of stress marker genes in the ABA signaling and ICE1-CBF-COR pathways. This study lays a theoretical foundation for exploring abiotic stress tolerance mechanisms and conducting stress-resistant molecular breeding in A. arguta. Full article
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