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Salt Stress Modulates the Landscape of Transcriptome and Alternative Splicing in Date Palm (Phoenix dactylifera L.)

文献类型： 外文期刊

作者： Xu, Zhongliang 1 ; Zhang, Ning 1 ; Fu, Haiquan 1 ; Wang, Fuyou 2 ; Wen, Mingfu 3 ; Chang, Hailong 3 ; Wu, Jiantao 3 ; Abdelaala, Walid Badawy 2 ; Luo, Qingwen 3 ; Li, Yang 3 ; Li, Cong 3 ; Wang, Qinnan 3 ; Wang, Zhen-Yu 3 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Sanya Res Inst, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Coconut Res Inst, Hainan, Peoples R China

3.Guangdong Acad Sci, Inst Nanfan & Seed Ind, Zhanjiang, Peoples R China

4.Guangzhou Sugarcane Ind Res Inst, Zhanjiang Sugarcane Res Ctr, Guangzhou, Peoples R China

5.Agr Res Ctr, Cent Lab Date Palm Res & Dev, Giza, Egypt

关键词： date palm; alternative splicing; salt stress; serine-arginine-rich proteins; signal transduction

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 12 卷

页码：

收录情况： SCI

摘要： Date palm regards as a valuable genomic resource for exploring the tolerance genes due to its ability to survive under the sever condition. Although a large number of differentiated genes were identified in date palm responding to salt stress, the genome-wide study of alternative splicing (AS) landscape under salt stress conditions remains unknown. In the current study, we identified the stress-related genes through transcriptomic analysis to characterize their function under salt. A total of 17,169 genes were differentially expressed under salt stress conditions. Gene expression analysis confirmed that the salt overly sensitive (SOS) pathway genes, such as PdSOS2;1, PdSOS2;2, PdSOS4, PdSOS5, and PdCIPK11 were involved in the regulation of salt response in date palm, which is consistent with the physiological analysis that high salinity affected the Na+/K+ homeostasis and amino acid profile of date palm resulted in the inhibition of plant growth. Interestingly, the pathway of "spliceosome" was enriched in the category of upregulation, indicating their potential role of AS in date palm response to salt stress. Expectedly, many differentially alternative splicing (DAS) events were found under salt stress conditions, and some splicing factors, such as PdRS40, PdRSZ21, PdSR45a, and PdU2Af genes were abnormally spliced under salt, suggesting that AS-related proteins might participated in regulating the salt stress pathway. Moreover, the number of differentially DAS-specific genes was gradually decreased, while the number of differentially expressed gene (DEG)-specific genes was increased with prolonged salt stress treatment, suggesting that AS and gene expression could be distinctively regulated in response to salt stress. Therefore, our study highlighted the pivotal role of AS in the regulation of salt stress and provided novel insights for enhancing the resistance to salt in date palm.

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