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Abiotic Stress of Crops: Molecular Genetics and Genomics—2nd Edition
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Abiotic Stress of Crops: Molecular Genetics and Genomics—2nd Edition

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: 30 June 2025 | Viewed by 533

Special Issue Editor

Prof. Dr. Zhaoshi Xu

E-Mail Website
Guest Editor
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
Interests: drought; salt; heat; fusarium crown rot (FCR); regulation network; wheat; soybean
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Due in part to climate change and increasing water scarcity, drought, heat, and salt, dry-hot winds pose a substantial threat to agriculture worldwide, especially to the productivity of field crops. The time of onset, duration and intensity of drought stress can affect crop production to different degrees, and drought during the reproductive period can directly lead to losses of over 50% in average yield. Therefore, improving the abiotic stress tolerance of crops is of great importance.

With the advance in high-throughput sequencing technologies and release of crop reference genomes, the isolation of multiple genes and analysis of gene regulation networks has rapidly expanded in recent years. Genome information is laying the foundation for precision genome editing, ushering in a new era of soybean molecular breeding. This Special Issue will highlight abiotic stress responses, genomic research, gene–abiotic stress interactions, gene regulation mechanisms, and stress signal transduction.

Prof. Dr. Zhaoshi Xu
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 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

  • abiotic stress response
  • gene function
  • gene regulation
  • stress signal transduction
  • stress tolerance
  • tolerant mechanism
  • genomic research
  • gene editing
  • yield

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Published Papers (1 paper)

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Research

20 pages, 4756 KiB  
Article
The Physiological and Molecular Mechanisms of Exogenous Melatonin Promote the Seed Germination of Maize (Zea mays L.) under Salt Stress
by Jiajie Wang, Di Yan, Rui Liu, Ting Wang, Yijia Lian, Zhenzong Lu, Yue Hong, Ye Wang and Runzhi Li
Plants 2024, 13(15), 2142; https://doi.org/10.3390/plants13152142 - 2 Aug 2024
Viewed by 411
Abstract
Salt stress caused by high concentrations of Na+ and Cl- in soil is one of the most important abiotic stresses in agricultural production, which seriously affects grain yield. The alleviation of salt stress through the application of exogenous substances is important [...] Read more.
Salt stress caused by high concentrations of Na+ and Cl- in soil is one of the most important abiotic stresses in agricultural production, which seriously affects grain yield. The alleviation of salt stress through the application of exogenous substances is important for grain production. Melatonin (MT, N-acetyl-5-methoxytryptamine) is an indole-like small molecule that can effectively alleviate the damage caused by adversity stress on crops. Current studies have mainly focused on the effects of MT on the physiology and biochemistry of crops at the seedling stage, with fewer studies on the gene regulatory mechanisms of crops at the germination stage. The aim of this study was to explain the mechanism of MT-induced salt tolerance at physiological, biochemical, and molecular levels and to provide a theoretical basis for the resolution of MT-mediated regulatory mechanisms of plant adaptation to salt stress. In this study, we investigated the germination, physiology, and transcript levels of maize seeds, analyzed the relevant differentially expressed genes (DEGs), and examined salt tolerance-related pathways. The results showed that MT could increase the seed germination rate by 14.28–19.04%, improve seed antioxidant enzyme activities (average increase of 11.61%), and reduce reactive oxygen species accumulation and membrane oxidative damage. In addition, MT was involved in regulating the changes of endogenous hormones during the germination of maize seeds under salt stress. Transcriptome results showed that MT affected the activity of antioxidant enzymes, response to stress, and seed germination-related genes in maize seeds under salt stress and regulated the expression of genes related to starch and sucrose metabolism and phytohormone signal transduction pathways. Taken together, the results indicate that exogenous MT can affect the expression of stress response-related genes in salt-stressed maize seeds, enhance the antioxidant capacity of the seeds, reduce the damage induced by salt stress, and thus promote the germination of maize seeds under salt stress. The results provide a theoretical basis for the MT-mediated regulatory mechanism of plant adaptation to salt stress and screen potential candidate genes for molecular breeding of salt-tolerant maize. Full article
(This article belongs to the Special Issue Abiotic Stress of Crops: Molecular Genetics and Genomics—2nd Edition)
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