Plastid-localized amino acid metabolism coordinates rice ammonium tolerance and nitrogen use efficiency
文献类型： 外文期刊
作者： Xie, Yuanming 1 ; Lv, Yuanda 5 ; Jia, Letian 1 ; Zheng, Lulu 1 ; Li, Yonghui 1 ; Zhu, Ming 1 ; Tian, Mengjun 6 ; Wang, Ming 6 ; Qi, Weicong 5 ; Luo, Long 1 ; De Gernier, Hugues 3 ; Pelissier, Pierre-Mathieu 3 ; Motte, Hans 3 ; Lin, Shaoyan 1 ; Luo, Le 1 ; Xu, Guohua 1 ; Beeckman, Tom 3 ; Xuan, Wei 1 ;
作者机构： 1.Nanjing Agr Univ, Sanya Inst, State Key Lab Crop Genet & Germplasm Enhancement &, Nanjing, Peoples R China
2.Nanjing Agr Univ, Sanya Inst, MOA Key Lab Plant Nutr & Fertilizat Lowermiddle Re, Nanjing, Peoples R China
3.Univ Ghent, Dept Plant Biotechnol & Bioinformat, Ghent, Belgium
4.VIB UGent Ctr Plant Syst Biol, Ghent, Belgium
5.Jiangsu Acad Agr Sci, Excellence & Innovat Ctr, Nanjing, Peoples R China
6.Nanjing Agr Univ, Dept Plant Pathol, Nanjing, Peoples R China
期刊名称：NATURE PLANTS （ 影响因子：18.0； 五年影响因子：18.6 ）
ISSN： 2055-026X
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Ammonium toxicity affecting plant metabolism and development is a worldwide problem impeding crop production. Remarkably, rice (Oryza sativa L.) favours ammonium as its major nitrogen source in paddy fields. We set up a forward-genetic screen to decipher the molecular mechanisms conferring rice ammonium tolerance and identified rohan showing root hypersensitivity to ammonium due to a missense mutation in an argininosuccinate lyase (ASL)-encoding gene. ASL localizes to plastids and its expression is induced by ammonium. ASL alleviates ammonium-inhibited root elongation by converting the excessive glutamine to arginine. Consequently, arginine leads to auxin accumulation in the root meristem, thereby stimulating root elongation under high ammonium. Furthermore, we identified natural variation in the ASL allele between japonica and indica subspecies explaining their different root sensitivity towards ammonium. Finally, we show that ASL expression positively correlates with root ammonium tolerance and that nitrogen use efficiency and yield can be improved through a gain-of-function approach. This study identifies argininesuccinate lyase, a key member of the urea cycle for arginine biosynthesis, as an important molecular component of rice root tolerance to ammonium and so as a potential lead to improve nitrogen use efficiency and yield.
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