Comparative transcriptome and genome analysis unravels the response of Tatary buckwheat root to nitrogen deficiency
文献类型： 外文期刊
作者： Liu, Changying 1 ; Qiu, Qingcheng 1 ; Zou, Bangxing 1 ; Wu, Qi 1 ; Ye, Xueling 1 ; Wan, Yan 1 ; Huang, Jingwei 1 ; Wu, Xiaoyong 1 ; Sun, Yanxia 1 ; Yan, Huiling 1 ; Fan, Yu 1 ; Jiang, Liangzhen 1 ; Zheng, Xiaoqin 1 ; Zhao, Gang 1 ; Zou, Liang 1 ; Xiang, Dabing 1 ;
作者机构： 1.Chengdu Univ, Sichuan Engn & Technol Res Ctr Coarse Cereal Indus, Key Lab Coarse Cereal Proc, Sch Food & Biol Engn,Minist Agr & Rural Affairs, Chengdu 610106, Sichuan, Peoples R China
2.Sichuan Acad Agr Sci, Sericultural Res Inst, Nanchong 637000, Sichuan, Peoples R China
关键词： Nitrogen; Root; Transcriptome; Tartary buckwheat; Whole-genome re -sequencing
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）
ISSN： 0981-9428
年卷期： 2023 年 196 卷
页码：
收录情况： SCI
摘要： Tartary buckwheat (Fagopyrum tataricum Garetn.), a dicotyledonous herbaceous crop, has good adaptation to low nitrogen (LN) condition. The plasticity of roots drives the adaption of Tartary buckwheat under LN, but the detailed mechanism behind the response of TB roots to LN remains unclear. In this study, the molecular mechanism of two Tartary buckwheat genotypes' roots with contrasting sensitivity in response to LN was investigated by integrating physiological, transcriptome and whole-genome re-sequencing analysis. LN improved primary and lateral root growth of LN-sensitive genotype, whereas the roots of LN-insensitive genotype showed no response to LN. 2, 661 LN-responsive differentially expressed genes (DEGs) were identified by transcriptome analysis. Of these genes, 17 N transport and assimilation-related and 29 hormone biosynthesis and signaling genes showed response to LN, and they may play important role in Tartary buckwheat root development under LN. The flavonoid biosynthetic genes' expression was improved by LN, and their transcriptional regulations mediated by MYB and bHLH were analyzed. 78 transcription factors, 124 small secreted peptides and 38 receptor-like protein kinases encoding genes involved in LN response. 438 genes were differentially expressed between LN-sensitive and LN-insensitive genotypes by comparing their transcriptome, including 176 LNresponsive DEGs. Furthermore, nine key LN-responsive genes with sequence variation were identified, including FtNRT2.4, FtNPF2.6 and FtMYB1R1. This paper provided useful information on the response and adaptation of Tartary buckwheat root to LN, and the candidate genes for breeding Tartary buckwheat with high N use efficiency were identified.
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