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Transcription factor ZmEREB97 regulates nitrate uptake in maize (Zea mays) roots

文献类型： 外文期刊

作者： Wu, Qi 1 ; Xu, Jinyan 1 ; Zhao, Yingdi 1 ; Wang, Yuancong 1 ; Zhou, Ling 1 ; Ning, Lihua 1 ; Shabala, Sergey 3 ; Zhao, Han 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Prov Key Lab Agrobiol, Nanjing 210014, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Crop Germplasm & Biotechnol, Nanjing 210014, Peoples R China

3.Univ Western Australia, Sch Biol Sci, Crawley, WA 6009, Australia

4.Foshan Univ, Dept Hort, Foshan 528000, Peoples R China

5.Foshan Univ, Int Res Ctr Environm Membrane Biol, Foshan 528000, Peoples R China

6.Jiangsu Acad Agr Sci, Key Lab Germplasm Innovat Downstream Huaihe River, Nanjing 210014, Peoples R China

期刊名称：PLANT PHYSIOLOGY （ 影响因子：7.4； 五年影响因子：8.7 ）

ISSN： 0032-0889

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Maize (Zea mays L.) has very strong requirements for nitrogen. However, the molecular mechanisms underlying the regulations of nitrogen uptake and translocation in this species are not fully understood. Here, we report that an APETALA2/ETHYLENE RESPONSE FACTOR (AP2/ERF) transcription factor ZmEREB97 functions as an important regulator in the N signaling network in maize. Predominantly expressed and accumulated in main root and lateral root primordia, ZmEREB97 rapidly responded to nitrate treatment. By overlapping the analyses of differentially expressed genes and conducting a DAP-seq assay, we identified 1,446 potential target genes of ZmEREB97. Among these, 764 genes were coregulated in 2 lines of zmereb97 mutants. Loss of function of ZmEREB97 substantially weakened plant growth under both hydroponic and soil conditions. Physiological characterization of zmereb97 mutant plants demonstrated that reduced biomass and grain yield were both associated with reduced nitrate influx, decreased nitrate content, and less N accumulation. We further demonstrated that ZmEREB97 directly targets and regulates the expression of 6 ZmNRT genes by binding to the GCC-box-related sequences in gene promoters. Collectively, these data suggest that ZmEREB97 is a major positive regulator of the nitrate response and that it plays an important role in optimizing nitrate uptake, offering a target for improvement of nitrogen use efficiency in crops. An ethylene response transcription factor plays an important role in the nitrogen signaling network and in optimizing nitrate uptake in maize.

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