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Transcriptome Profiling Reveals the Gene Network Responding to Low Nitrogen Stress in Wheat

文献类型： 外文期刊

作者： Wang, Yiwei 1 ; Li, Pengfeng 2 ; Zhu, Yiwang 2 ; Shang, Yuping 2 ; Wu, Zhiqiang 2 ; Tao, Yongfu 2 ; Wang, Hongru 2 ; Li, Dongxi 1 ; Zhang, Cuijun 2 ;

作者机构： 1.Taiyuan Univ Technol, Coll Comp Sci & Technol, Taiyuan 030024, Peoples R China

2.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr,Minist Agr & Rura, Shenzhen 518120, Peoples R China

3.South China Agr Univ, Coll Life Sci, Guangzhou 510642, Peoples R China

4.Shanxi Agr Univ, Coll Agron, Jinzhong 030801, Peoples R China

关键词： wheat; low nitrogen; RNA-seq; nitrogen signaling network

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 3 期

页码：

收录情况： SCI

摘要： As one of the essential nutrients for plants, nitrogen (N) has a major impact on the yield and quality of wheat worldwide. Due to chemical fertilizer pollution, it has become increasingly important to improve crop yield by increasing N use efficiency (NUE). Therefore, understanding the response mechanisms to low N (LN) stress is essential for the regulation of NUE in wheat. In this study, LN stress significantly accelerated wheat root growth, but inhibited shoot growth. Further transcriptome analysis showed that 8468 differentially expressed genes (DEGs) responded to LN stress. The roots and shoots displayed opposite response patterns, of which the majority of DEGs in roots were up-regulated (66.15%; 2955/4467), but the majority of DEGs in shoots were down-regulated (71.62%; 3274/4565). GO and KEGG analyses showed that nitrate reductase activity, nitrate assimilation, and N metabolism were significantly enriched in both the roots and shoots. Transcription factor (TF) and protein kinase analysis showed that genes such as MYB-related (38/38 genes) may function in a tissue-specific manner to respond to LN stress. Moreover, 20 out of 107 N signaling homologous genes were differentially expressed in wheat. A total of 47 transcriptome datasets were used for weighted gene co-expression network analysis (17,840 genes), and five TFs were identified as the potential hub regulatory genes involved in the response to LN stress in wheat. Our findings provide insight into the functional mechanisms in response to LN stress and five candidate regulatory genes in wheat. These results will provide a basis for further research on promoting NUE in wheat.

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