Temporal transcriptome analysis under salt stress reveals disrupted rhythmic expression and altered homoeolog usage in allopolyploid cotton
文献类型: 外文期刊
作者: Gao, Zhan;Niu, Ruoyu;Li, Dongming;Xiong, Xianpeng;Zhang, Xianliang;Lv, Yulong;Li, Yu;Ma, Xiongfeng;Zhu, De;Hu, Guanjing
作者机构:
关键词: Gossypium hirsutum;Salt stress;Time-series transcriptomics;Rhythmic expression;Transcriptional regulation;Homoeolog expression bias
期刊名称: INDUSTRIAL CROPS AND PRODUCTS
ISSN: 0926-6690
年卷期: 2026 年 239 卷
页码:
收录情况: SCIE(2025版) ; ; EI(2025版)
摘要: Excessive soil salinity poses a significant threat to plant growth and agricultural production. However, the dynamic transcriptional processes underlying plant salt stress response, particularly the transition from transient to steady-state responses and the involvement of rhythmic regulation, remain poorly understood. Here we conducted phenotypic and transcriptomic analyses of upland cotton (Gossypium hirsutum) under salt stress, generating a high-resolution temporal expression profile. Our results identified distinct stress perception and homeostasis responsive phases of gene regulation and revealed a substantial disruption of rhythmic gene expression under stress. A large proportion of rhythmically expressed genes (REGs) lost rhythmicity, with significant alterations in expression phase, period and amplitude. Furthermore, we found that salt stress induced notable shifts in homoeolog expression bias (HEB), suggesting a role for subgenome regulation in environmental plasticity. Collectively, our findings distinguish short-term from long-term adaptive changes and underscore the interplay between stress-induced and rhythmic-regulated transcription. This work provides valuable insights into the temporal and regulatory complexity of salt stress in cotton.
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