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Characterization of the Heat Shock Transcription Factor Family in Medicago sativa L. and Its Potential Roles in Response to Abiotic Stresses

文献类型： 外文期刊

作者： Hao Liu;Xianyang Li;Yunfei Zi;Guoqing Zhao;Lihua Zhu;Ling Hong;Mingna Li;Shiqing Wang;Ruicai Long;Junmei Kang;Qingchuan Yang;Lin Chen

作者机构：

关键词： abiotic stress;alfalfa;gene family;genome-wide;MsHSF

期刊名称： International Journal of Molecular Sciences

ISSN： 1661-6596

年卷期： 2023 年 24 卷 16 期

页码：

收录情况： SCIE（2023版）

摘要： Heat shock transcription factors (HSFs) are important regulatory factors in plant stress responses to various biotic and abiotic stresses and play important roles in growth and development. The HSF gene family has been systematically identified and analyzed in many plants but it is not in the tetraploid alfalfa genome. We detected 104 HSF genes (MsHSFs) in the tetraploid alfalfa genome (“Xinjiangdaye” reference genome) and classified them into three subgroups: 68 in HSFA, 35 in HSFB and 1 in HSFC subgroups. Basic bioinformatics analysis, including genome location, protein sequence length, protein molecular weight and conserved motif identification, was conducted. Gene expression analysis revealed tissue-specific expression for 13 MsHSFs and tissue-wide expression for 28 MsHSFs. Based on transcriptomic data analysis, 21, 11 and 27 MsHSFs responded to drought stress, cold stress and salt stress, respectively, with seven responding to all three. According to RT–PCR, MsHSF27/33 expression gradually increased with cold, salt and drought stress condition duration; MsHSF6 expression increased over time under salt and drought stress conditions but decreased under cold stress. Our results provide key information for further functional analysis of MsHSFs and for genetic improvement of stress resistance in alfalfa.

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