Transcriptome analysis and identification of the low potassium stress-responsive gene SiSnRK2.6 in foxtail millet (Setaria italica L.)
文献类型： 外文期刊
作者： Ma, Xiaoqian 1 ; Khan, Najeeb Ullah 3 ; Dai, Shutao 2 ; Qin, Na 2 ; Han, Zanping 1 ; Guo, Bing 1 ; Li, Junxia 2 ;
作者机构： 1.Henan Univ Sci & Technol, Coll Agr, Luoyang 471000, Peoples R China
2.Henan Acad Agr Sci, Cereal Crops Inst, Zhengzhou 450002, Peoples R China
3.China Agr Univ, Coll Agr, Beijing 100193, Peoples R China
期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）
ISSN： 0040-5752
年卷期： 2024 年 137 卷 1 期
页码：
收录情况： SCI
摘要： Foxtail millet (Setaria italica L.), which originated in China, has high nutrient utilization character. Nevertheless, the molecular mechanism of its tolerance to low potassium stress is largely unclear. In this research, the low potassium tolerant variety "Yugu28" was screened out by low potassium stress treatment, and the transcriptome of "Yugu28" under low potassium stress was comprehensively analyzed. A total of 4254 differentially expressed genes (DEGs) were identified, including 1618 up-regulated and 2636 down-regulated genes, respectively. In addition, there were 302 transcription factor (TF) genes in the DEGs and MYB TFs accounted for the highest proportion, which was 14.9%. After functional analysis of all DEGs, a total of 7 genes involved in potassium transport and potassium ion channels and 50 genes corresponding to hormones were screened. The expression levels of randomly selected 17 DEGs were verified by qRT-PCR and the results coincided well with the RNA-seq analysis, indicating the reliability of our transcriptome data. Moreover, one of the ABA signaling pathway genes, SiSnRK2.6, was identified and selected for further functional verification. Compared with the wild type, transgenic rice with ecotopic expression of SiSnRK2.6 showed remarkably increased root length and root number, indicating that overexpression of SiSnRK2.6 can enhance the resistance of transgenic plants to low potassium stress.
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