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Recent Advances in Molecular Breeding for Drought and Salt Stress Tolerance in Crops: 2nd Edition

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 30 May 2025 | Viewed by 1143

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,

Abiotic stresses, especially drought and salt, seriously affect plant growth and crop quality and yield. Plants have evolved defense systems and sophisticated mechanisms that help them adapt to changing environments. These systems include plant hormones and related signaling compounds, which play important roles in the regulation of plant responses to various environmental stresses. Elucidating the molecular mechanisms involved in plant stress tolerance is critical for relieving the effects of environmental stresses on plant growth.

With the advance in high-throughput sequencing technologies, the isolation of multiple genes and analyses of the gene regulation network have ballooned in recent years. The scope of this Special Issue is to summarize and enhance knowledge about abiotic stress recognition, transduction, and regulation networks in plants.

Topics include, but are not limited to, the following:

  • Abiotic stresses, including drought, salt, heat, cold, dry–hot wind, and hormones.
  • Gene isolation, functional identification, and tolerant mechanisms.
  • Stress signal transduction pathway, including receptor signal recognition, transduction, and regulation networks.
  • Abiotic stress responses, gene–abiotic stress interactions, and diverse signaling molecules.
  • Multiomics analysis.

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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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

  • drought
  • salt
  • heat
  • cold
  • gene regulation
  • genomic research
  • multiomics
  • epigenetics
  • stress signal transduction

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Related Special Issue

Published Papers (2 papers)

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Research

13 pages, 2527 KiB  
Article
Exploring Drought Resistance Genes from the Roots of the Wheat Cultivar Yunhan1818
by Linyi Qiao, Lifang Chang, Mengxiang Kai, Xueqi Zhang, Tingting Kang, Lijuan Wu, Xiaojun Zhang, Xin Li, Jiajia Zhao, Zhiyong Zhao and Jun Zheng
Int. J. Mol. Sci. 2024, 25(24), 13458; https://doi.org/10.3390/ijms252413458 - 16 Dec 2024
Viewed by 319
Abstract
The root is an important organ by which plants directly sense variation in soil moisture. The discovery of drought stress-responsive genes in roots is very important for the improvement of drought tolerance in wheat varieties via molecular approaches. In this study, transcriptome sequencing [...] Read more.
The root is an important organ by which plants directly sense variation in soil moisture. The discovery of drought stress-responsive genes in roots is very important for the improvement of drought tolerance in wheat varieties via molecular approaches. In this study, transcriptome sequencing was conducted on the roots of drought-tolerant wheat cultivar YH1818 seedlings at 0, 2, and 7 days after treatment (DAT). Based on a weighted gene correlation network analysis of differentially expressed genes (DEGs), 14 coexpression modules were identified, of which five modules comprising 3107 DEGs were related to 2 or 7 DAT under drought stress conditions. A total of 223,357 single-nucleotide polymorphisms (SNPs) of these DEGs were retrieved from public databases. Using the R language package and GAPIT program, association analysis was performed between the 223,357 SNPs and the drought tolerance coefficient (DTC) values of six drought resistance-related traits in 114 wheat germplasms. The results revealed that 18 high-confidence SNPs of 10 DEGs, including TaPK, TaRFP, TaMCO, TaPOD, TaC3H-ZF, TaGRP, TaDHODH, TaPPDK, TaLectin, and TaARF7-A, were associated with drought tolerance. The RT–qPCR results confirmed that these genes were significantly upregulated by drought stress at 7 DAT. Among them, TaARF7-A contained three DTC-related SNPs, which presented two haplotypes in the tested wheat germplasms. YH1818 belongs to the Hap1 allele, which is involved in increased drought tolerance. This study revealed key modules and candidate genes for understanding the drought-stress response mechanism in wheat roots. Full article
(This article belongs to the Special Issue Recent Advances in Molecular Breeding for Drought and Salt Stress Tolerance in Crops: 2nd Edition)
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17 pages, 5292 KiB  
Article
Wheat WW Domain-Containing Protein TaCFL1 Negatively Regulates Cuticular Wax Biosynthesis
by Wanzhen Chen, Lang Liu, Xiaoyu Wang, Haoyu Li, Jiao Liu, Pengfei Zhi and Cheng Chang
Int. J. Mol. Sci. 2024, 25(23), 13187; https://doi.org/10.3390/ijms252313187 - 8 Dec 2024
Viewed by 425
Abstract
Waxy cuticle covers plant aerial organs and protects plants against environmental challenges. Although improved cuticle-associated traits are aimed at the wheat breeding programs, the mechanism governing wheat cuticular wax biosynthesis remains to be elucidated. Herein, wheat WW domain-containing protein TaCFL1 is characterized as [...] Read more.
Waxy cuticle covers plant aerial organs and protects plants against environmental challenges. Although improved cuticle-associated traits are aimed at the wheat breeding programs, the mechanism governing wheat cuticular wax biosynthesis remains to be elucidated. Herein, wheat WW domain-containing protein TaCFL1 is characterized as a negative regulator of wax biosynthesis. The knockdown of TaCFL1 expression results in a 15% increase in wax accumulation and decreased leaf cuticle permeability in bread wheat. Furthermore, wheat class IV homeodomain transcription factors TaHDG1.1 and TaHDG1.2 are identified as partially redundant activators of wax biosynthesis. The silencing of TaHDG1.1 or TaHDG1.2 expression leads to an 11% reduction in epidermal wax accumulation and an increase in leaf cuticle permeability wax, while the co-silencing of TaHDG1.1 and TaHDG1.2 results in a 31% reduction in epidermal wax accumulation and a further increase in wax in the leaf cuticle permeability. Moreover, wheat 3-Ketoacyl-CoA synthase TaKCS10 is isolated as an essential component of the wax biosynthetic machinery. The silencing of TaKCS10 expression results in a 22% reduction in wax accumulation and increased leaf cuticle permeability. In addition, we demonstrated that the TaKCS10 expression is activated by TaHDG1.1 and TaHDG1.2, and that TaCFL1 attenuates the TaHDG1-mediated transcriptional activation of TaKCS10. This evidence supports that the WW domain-containing protein TaCFL1 negatively regulates wax biosynthesis via attenuating the transcriptional activation of the TaKCS10 gene mediated by HD-ZIP IV transcription factor TaHDG1. Full article
(This article belongs to the Special Issue Recent Advances in Molecular Breeding for Drought and Salt Stress Tolerance in Crops: 2nd Edition)
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