A cyclic nucleotide-gated channel gene HcCNGC21 positively regulates salt and drought stress responses in kenaf ( Hibiscus cannabinus L.)
文献类型： 外文期刊
作者： Chen, Canni 1 ; Wu, Qijing 1 ; Yue, Jiao 1 ; Wang, Xu 1 ; Wang, Caijin 1 ; Wei, Rujian 1 ; Li, Ru 2 ; Jin, Gang 3 ; Chen, Tao 3 ; Chen, Peng 1 ;
作者机构： 1.Guangxi Univ, Coll Agr, Key Lab Crop Genet Breeding & Germplasm Innovat, Guangxi Key Lab Agroenvironm & Agr Prod Safety, Nanning 530004, Peoples R China
2.Guangxi Univ, Coll Life Sci & Technol, Nanning 530004, Peoples R China
3.Guangxi Subtrop Crops Res Inst, Nanning 530001, Peoples R China
关键词： HcCNGC21; Kenaf; Drought stress; Salt stress; Transgenic Arabidopsis thaliana; VIGS
期刊名称：PLANT SCIENCE （ 影响因子：5.2； 五年影响因子：5.7 ）
ISSN： 0168-9452
年卷期： 2024 年 345 卷
页码：
收录情况： SCI
摘要： Cyclic Nucleotide-Gated Channels (CNGCs) serve as Ca2+ permeable cation transport pathways, which are involved in the regulation of various biological functions such as plant cell ion selective permeability, growth and development, responses to biotic and abiotic stresses. At the present study, a total of 31 CNGC genes were identified and bioinformatically analyzed in kenaf. Among these genes, HcCNGC21 characterized to localize at the plasma membrane, with the highest expression levels in leaves, followed by roots. In addition, HcCNGC21 could be significantly induced under salt or drought stress. Virus-induced gene silencing (VIGS) of HcCNGC21 in kenaf caused notable growth inhibition under salt or drought stress, characterized by reductions in plant height, stem diameter, leaf area, root length, root surface area, and root tip number. Meanwhile, the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were significantly decreased, accompanied by reduced levels of osmoregulatory substances and total chlorophyll content. However, ROS accumulation and Na+ content increased. The expression of stress-responsive genes, such as HcSOD, HcPOD, HcCAT, HcERF3, HcNAC29, HcP5CS, HcLTP, and HcNCED, was significantly downregulated in these silenced lines. However, under salt or drought stress, the physiological performance and expression of stress-related genes in transgenic Arabidopsis thaliana plants overexpressing HcCNGC21 were diametrically opposite to those of TRV2-HcCNGC21 kenaf line. Yeast two-hybrid (Y2H) and bimolecular fluorescence complementation (BiFC) assays revealed that HcCNGC21 interacts with HcAnnexin D1. These findings collectively underscore the positive role of HcCNGC21 in plant resistance to salt and drought stress.
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