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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

作者： Zhu, Chun Quan 1 ; Wei, QianQian 1 ; Kong, Ya Li 1 ; Xu, Qing Shan 1 ; Pan, Lin 1 ; Zhu, Lian Feng 1 ; Tian, Wen Hao 1 ; Jin, Qian Yu 1 ; Yu, Yi Jun 2 ; Zhang, Jun Hua 1 ;

作者机构： 1.China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Peoples R China

2.Zhejiang Cultivated Land Qual & Fertilizer Adm Stn, Hangzhou 310020, Peoples R China

3.Anhui Univ, Hefei 230039, Peoples R China

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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