Ammonium improved cell wall and cell membrane P reutilization and external P uptake in a putrescine and ethylene dependent pathway

文献类型： 外文期刊

第一作者： Zhu, Chun Quan

作者： Zhu, Chun Quan;Wei, QianQian;Kong, Ya Li;Xu, Qing Shan;Pan, Lin;Zhu, Lian Feng;Tian, Wen Hao;Jin, Qian Yu;Zhang, Jun Hua;Yu, Yi Jun;Wei, QianQian

作者机构：

关键词： Nitrogen form; Phosphorus; Ethylene; Putrescine; Remobilization; Absorption; Rice

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：5.437； 五年影响因子：5.731 ）

ISSN： 0981-9428

年卷期： 2022 年 191 卷

页码：

收录情况： SCI

摘要： Ammonium promotes rice P uptake and reutilization better than nitrate, under P starvation conditions; however, the underlying mechanism remains unclear. In this study, ammonium treatment significantly increased putres-cine and ethylene content in rice roots under P deficient conditions, by increasing the protein content of orni-thine decarboxylase and 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase compared with nitrate treatment. Ammonium treatment increased rice root cell wall P release by increasing pectin content and pectin methyl esterase (PME) activity, increased rice shoot cell membrane P release by decreasing phosphorus -containing lipid components, and maintained internal P homeostasis by increasing OsPT2/6/8 expression compared with nitrate treatment. Ammonium also improved external P uptake by regulating root morphology and increased rice grain yield by increasing the panicle number compared with nitrate treatment. The appli-cation of putrescine and ethylene synthesis precursor ACC further improved the above process. Our results demonstrate for the first time that ammonium increases rice P acquisition, reutilization, and homeostasis, and rice grain yield, in a putrescine-and ethylene-dependent manner, better than nitrate, under P starvation conditions.

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