Roles of Phytohormones in Plant Growth, Development and Abiotic Stress Response

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".

Deadline for manuscript submissions: 31 March 2026 | Viewed by 644

Special Issue Editors


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Guest Editor
College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
Interests: phytohormones; plant growth; plant development; drought; salinity; heat; heavy metals; abiotic stress response
College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
Interests: genetics; crop genomics engineering

Special Issue Information

Dear Colleagues,

Phytohormones serve as master regulators coordinating plant growth, developmental plasticity, and environmental adaptation. With climate change exacerbating abiotic stresses such as drought, salinity, heat, and heavy metal toxicity, understanding phytohormone signaling networks has become crucial for developing stress-resilient crops. This Special Issue explores the integrative roles of classical and emerging phytohormones—including auxins, cytokinins, abscisic acid, ethylene, gibberellins, brassinosteroids, strigolactones, jasmonates, and salicylic acid—through three interconnected perspectives:

  • Growth regulation: Hormonal coordination of meristem activity, cell elongation, and shoot-root growth dynamics;
  • Developmental programming: Hormonal control of phenological transitions (e.g., vernalization, flowering time), root system architecture, and organogenesis;
  • Abiotic stress response: Hormone-mediated stress perception, adaptation, and recovery.

Original research and reviews addressing these three research themes are welcome.

Dr. Changxi Yin
Dr. Fei Zhou
Guest Editors

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Keywords

  • phytohormones
  • plant growth
  • plant development
  • drought
  • salinity
  • heat
  • heavy metals
  • abiotic stress response

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Published Papers (1 paper)

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Review

17 pages, 1032 KB  
Review
Molecular Mechanisms of the Phytohormone–Heat Shock Protein Pathway in Regulating Plant Thermotolerance
by Jialiang Zhang, Yanchun Zhu, Fumin Ma, Xiao Zou, Qiuxia Lan, Xiaoran Zhou, Mengxia Li, Fei Zhou, Changxi Yin and Yongjun Lin
Plants 2025, 14(23), 3706; https://doi.org/10.3390/plants14233706 - 4 Dec 2025
Viewed by 446
Abstract
Heat stress caused by global climate change poses a significant threat to agricultural production. Phytohormones, as critical signaling molecules, play pivotal roles in modulating plant responses to heat stress. This review systematically summarizes the molecular mechanisms by which eight phytohormones (auxin, gibberellin, cytokinin, [...] Read more.
Heat stress caused by global climate change poses a significant threat to agricultural production. Phytohormones, as critical signaling molecules, play pivotal roles in modulating plant responses to heat stress. This review systematically summarizes the molecular mechanisms by which eight phytohormones (auxin, gibberellin, cytokinin, ethylene, abscisic acid, brassinosteroid, salicylic acid, and strigolactone) enhance plant thermotolerance through the regulation of heat shock protein (HSP) expression and function. Specifically, auxin enhances thermotolerance by inducing auxin signaling repressor (Aux/IAA) degradation to upregulate HSP transcription, facilitating the formation of the auxin receptor (TIR1)-HSP90 complex to stabilize TIR1, and forming the auxin exporter (PIN)-HSP22 complex to promote auxin transport. Cytokinin enhances thermotolerance by upregulating HSP transcription, with stronger effects in leaves than roots. Gibberellin, salicylic acid, and ethylene enhance thermotolerance primarily by activating heat shock factor (HSF) to induce HSP transcription. Abscisic acid and brassinosteroid improve thermotolerance by inducing HSP transcription and HSP phosphorylation, while strigolactone acts via D14-mediated upregulation of HSP transcription. These phytohormones collaboratively regulate HSPs, forming an intricate network to enhance plant thermotolerance. Deciphering these mechanisms provides a theoretical framework for developing heat-resistant crops and optimizing cultivation techniques. Full article
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