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Plants
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The Role of Plant Growth Regulators in Abiotic and Biotic...
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The Role of Plant Growth Regulators in Abiotic and Biotic Stress Mitigation

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: 15 August 2025 | Viewed by 648

Special Issue Editors

Dr. Lixin Wang

E-Mail Website
Guest Editor
College of Horticulture, Hebei Agricultural University, Baoding 071001, China
Interests: horticultural plants; transcriptomic; genome; gene family; fruit ripening; sequencing; biosynthesis; metabolitics; physiology; cold resistance; cold tolerance
Dr. Tengfei Xu

E-Mail Website1 Website2
Guest Editor
College of Horticulture, Northwest A&F University, Yangling, China
Interests: fruit berry quality; light signal; drought and high temperature stress; plant breeding and genetics

Special Issue Information

Dear Colleagues,

Plants that cannot move suffer various biotic and abiotic stress, such as insects or pathogen attack, drought, salinity, extreme temperatures, and heavy metal stresses, etc. These stresses can severely limit crop plant growth and productivity. Plant growth regulators (PGRs), also known as plant hormones or phytohormones, are naturally occurring organic compounds that are produced within the plant or introduced artificially. PGRs play a crucial role in mitigating these damages and enhancing plant tolerance to both abiotic and biotic stresses. Understanding the complex regulatory networks of PGRs in stress mitigation offers great potential for developing strategies to improve crop resilience and agricultural sustainability in the face of various environmental challenges. This Special Issue of Plants provides a platform for researchers to publish their research results on all kinds of PGRs including auxins, gibberellins, cytokinins, abscisic acid, ethylene, and other PGRs in the mitigation of damage caused by individual biotic and abiotic stress. Research on the underlying molecular mechanisms is welcome.

Dr. Lixin Wang
Dr. Tengfei Xu
Guest Editors

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 100 words) can be sent to the Editorial Office for announcement on this website.

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. Plants is an international peer-reviewed open access semimonthly 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 2700 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

  • plant growth regulators
  • biotic stress
  • abiotic stress
  • mechanism

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Published Papers (1 paper)

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Research

17 pages, 3141 KiB  
Article
Integrated Cytological, Physiological, and Comparative Transcriptome Profiling Analysis of the Male Sterility Mechanism of ‘Xinli No.7’ Pear (Pyrus sp.)
by Hao Li, Xiangyü Li, Yüjia Luo, Quanhui Ma, Zhi Luo, Jiayuan Xuan, Cuiyun Wu and Fenfen Yan
Plants 2025, 14(12), 1783; https://doi.org/10.3390/plants14121783 - 11 Jun 2025
Viewed by 334
Abstract
Pyrus bretschneideri ‘Xinli No.7’, a progeny of Pyrus sinkiangensis ‘Korla Fragrant Pear’, is an early-maturing, high-quality pear (Pyrus spp.) cultivar. As a dominant variety in China’s pear-producing regions, it holds significant agricultural importance. Investigating its male sterility (MS) mechanisms is critical for [...] Read more.
Pyrus bretschneideri ‘Xinli No.7’, a progeny of Pyrus sinkiangensis ‘Korla Fragrant Pear’, is an early-maturing, high-quality pear (Pyrus spp.) cultivar. As a dominant variety in China’s pear-producing regions, it holds significant agricultural importance. Investigating its male sterility (MS) mechanisms is critical for hybrid breeding and large-scale cultivation. Integrated cytological, physiological, and transcriptomic analyses were conducted to compare dynamic differences between male sterility (MS, ‘Xinli No.7’) and male-fertile (MF, ‘Korla Fragrant Pear’) plants during anther development. Cytological observations revealed that, compared with ‘Korla Fragrant Pear’, the tapetum of ‘Xinli No.7’ exhibited delayed degradation and abnormal thickening during the uninucleate microspore stage. This pathological alteration compressed the microspores, ultimately leading to their abortion. Physiological assays demonstrated excessive reactive oxygen species (ROS) accumulation, lower proline content, higher malondialdehyde (MDA) levels, and reduced activities of antioxidant enzymes (peroxidase and catalase) in MS plants. Comparative transcriptomics identified 283 co-expressed differentially expressed genes (DEGs). Functional enrichment linked these DEGs to ROS-scavenging pathways: galactose metabolism, ascorbate and aldarate metabolism, arginine and proline metabolism, fatty acid degradation, pyruvate metabolism, and flavonoid biosynthesis. qRT-PCR validated the expression patterns of key DEGs in these pathways. A core transcriptome-mediated MS network was proposed, implicating accelerated ROS generation and dysregulated tapetal programmed cell death. These findings provide theoretical insights into the molecular mechanisms of male sterility in ‘Xinli No.7’, supporting future genetic and breeding applications. Full article
(This article belongs to the Special Issue The Role of Plant Growth Regulators in Abiotic and Biotic Stress Mitigation)
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