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Variety-Specific Transcriptional and Alternative Splicing Regulations Modulate Salt Tolerance in Rice from Early Stage of Stress

文献类型： 外文期刊

作者： Jian, Guihua 1 ; Mo, Yujian 1 ; Hu, Yan 1 ; Huang, Yongxiang 1 ; Ren, Lei 1 ; Zhang, Yueqin 1 ; Hu, Hanqiao 1 ; Zhou, Shuangxi 3 ; Liu, Gang 4 ; Guo, Jianfu 1 ; Ling, Yu 1 ;

作者机构： 1.Guangdong Ocean Univ, Coll Coastal Agr Sci, Zhanjiang 524088, Peoples R China

2.Natl Saline Alkali Tolerant Rice Technol Innovat, South China Branch, Zhanjiang 524088, Peoples R China

3.Macquarie Univ, Dept Biol Sci, N Ryde, NSW 2019, Australia

4.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improve, Wuhan 430064, Peoples R China

关键词： Rice; Salt stress; mRNA alternative splicing; Gene expression; Chloroplast; ROS

期刊名称：RICE （ 影响因子：5.5； 五年影响因子：5.8 ）

ISSN： 1939-8425

年卷期： 2022 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Salt stress poses physiological drought, ionic toxicity and oxidative stress to plants, which causes premature senescence and death of the leaves if the stress sustained. Salt tolerance varied between different rice varieties, but how different rice varieties respond at the early stage of salt stress has been seldom studied comprehensively. By employing third generation sequencing technology, we compared gene expressional changes in leaves of three rice varieties that varied in their level of tolerance after salt stress treatment for 6 h. Commonly up-regulated genes in all rice varieties were related to water shortage response and carbon and amino acids metabolism at the early stage of salt stress, while reactive oxygen species cleavage genes were induced more in salt-tolerant rice. Unexpectedly, genes involved in chloroplast development and photosynthesis were more significantly down-regulated in the two salt tolerant rice varieties 'C34' and 'Nona Bokra'. At the same time, genes coding ribosomal protein were suppressed to a more severe extent in the salt-sensitive rice variety 'IR29'. Interestingly, not only variety-specific gene transcriptional regulation, but also variety-specific mRNA alternative splicing, on both coding and long-noncoding genes, were found at the early stage of salt stress. In summary, differential regulation in gene expression at both transcriptional and post-transcriptional levels, determine and fine-tune the observed response in level of damage in leaves of specific rice genotypes at early stage of salt stress.

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