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OsEIL1 is involved in the response to heterogeneous high ammonium in rice: A split-root analysis

文献类型： 外文期刊

作者： Wu, Jinlin 1 ; Coskun, Devrim 3 ; Li, Guangjie 4 ; Wang, Zhaoyue 1 ; Kronzucker, Herbert J. 5 ; Shi, Weiming 1 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 East Beijing Rd, Nanjing 210008, Peoples R China

2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China

3.Univ Laval, Dept Phytol, Quebec City, PQ G1V 0A6, Canada

4.Shandong Acad Agr Sci, Inst Agr Resources & Environm, State Key Lab Nutrient Use & Management, Jinan 250100, Peoples R China

5.Univ Melbourne, Sch Biosci, Parkville, Vic 3010, Australia

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

关键词： Heterogeneous high NH 4+; Systemic response; NH 4+efflux; OsEIL1; OsVTC1-3

期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：4.3； 五年影响因子：4.5 ）

ISSN： 0176-1617

年卷期： 2024 年 295 卷

页码：

收录情况： SCI

摘要： Ammonium (NH4+) concentrations in rice fields show heterogeneous spatial distribution under the combined influences of nitrogen fertilizer application and modern agronomic practices. However, the characteristics and mechanisms of rice roots in response to heterogeneous NH4+ supply are not well understood. Here, we found a systemic response of rice roots to heterogeneous and high (10 mM) NH4+ supply using a split-root experiment, and show root growth on the NH4+-free (NO3 ) side was also inhibited by localized high-NH4+ supply. Moreover, OsEIL1 (encoding a core transcription factor in the ethylene signaling pathway) was found to be involved in the response of rice roots to heterogeneous NH4+. OsEIL1 mutation significantly increased the inhibitory effect of localized high-NH4+ on root growth of the NO3 side, as well as significantly increased NH4+ efflux there. Furthermore, our results indicate that the mitigating effect of OsEIL1 on NH4+ efflux is related to the regulated expression of OsVTC1-3 (encoding a GDP-mannose pyrophosphorylase). These findings provide insight into the mechanisms by which OsEIL1 responds to heterogeneous high NH4+ and contribute to our understanding of rice adaptation to heterogeneous NH4+ supply.

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