Transcriptome Expression Profiling Reveals the Molecular Response to Salt Stress in Gossypium anomalum Seedlings
文献类型： 外文期刊
作者： Yu, Huan 1 ; Guo, Qi 2 ; Ji, Wei 2 ; Wang, Heyang 2 ; Tao, Jingqi 2 ; Xu, Peng 2 ; Chen, Xianglong 2 ; Ali, Wuzhimu 2 ; Wu, Xuan 2 ; Shen, Xinlian 2 ; Xie, Yinfeng 1 ; Xu, Zhenzhen 2 ;
作者机构： 1.Nanjing Forestry Univ, Coll Life Sci, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Ind Crops, Key Lab Cotton & Rapeseed Nanjing, Minist Agr & Rural Affairs, Nanjing 210014, Peoples R China
关键词： Gossypium anomalum; salt stress; physiological and biochemical index; RNA-Seq; molecular response
期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 2 期
页码：
收录情况： SCI
摘要： Some wild cotton species are remarkably tolerant to salt stress, and hence represent valuable resources for improving salt tolerance of the domesticated allotetraploid species Gossypium hirsutum L. Here, we first detected salt-induced stress changes in physiological and biochemical indexes of G. anomalum, a wild African diploid cotton species. Under 350 mmol/L NaCl treatment, the photosynthetic parameters declined significantly, whereas hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents increased. Catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD) activity and proline (PRO) content also significantly increased, reaching peak values at different stages of salt stress. We used RNA-Seq to characterize 15,476 differentially expressed genes in G. anomalum roots after 6, 12, 24, 72, and 144 h of salt stress. Gene Ontology enrichment analysis revealed these genes to be related to sequence-specific DNA and iron ion binding and oxidoreductase, peroxidase, antioxidant, and transferase activity; meanwhile, the top enriched pathways from the Kyoto Encyclopedia of Genes and Genomes database were plant hormone signal transduction, phenylpropanoid biosynthesis, fatty acid degradation, carotenoid biosynthesis, zeatin biosynthesis, starch and sucrose metabolism, and MAPK signaling. A total of 1231 transcription factors were found to be expressed in response to salt stress, representing ERF, MYB, WRKY, NAC, C2H2, bZIP, and HD-ZIP families. Nine candidate genes were validated by quantitative real-time PCR and their expression patterns were found to be consistent with the RNA-Seq data. These data promise to significantly advance our understanding of the molecular response to salt stress in Gossypium spp., with potential value for breeding applications.
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