The AtMINPP Gene, Encoding a Multiple Inositol Polyphosphate Phosphatase, Coordinates a Novel Crosstalk between Phytic Acid Metabolism and Ethylene Signal Transduction in Leaf Senescence
文献类型： 外文期刊
作者： Peng, Xiaoyun 1 ; Li, Haiou 1 ; Xu, Wenzhong 2 ; Yang, Qian 1 ; Li, Dongming 3 ; Fan, Tingting 1 ; Li, Bin 4 ; Ding, Junhui 1 ; Ku, Wenzhen 1 ; Deng, Danyi 1 ; Zhu, Feiying 1 ; Xiao, Langtao 1 ; Wang, Ruozhong 1 ;
作者机构： 1.Hunan Agr Univ, Hunan Prov Key Lab Phytohormones & Growth Dev, Changsha 410128, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Plant Divers & Specialty Crops, Beijing 100093, Peoples R China
3.Inner Mongolia Univ, Minist Educ, Sch Life Sci, Key Lab Herbage & Endem Crop Biol, Hohhot 010021, Peoples R China
4.Hunan Acad Agr Sci, Changsha 410125, Peoples R China
关键词： Arabidopsis; EIN3; ethylene; leaf senescence; multiple inositol polyphosphate phosphatase; senescence-associated genes
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）
ISSN： 1661-6596
年卷期： 2024 年 25 卷 16 期
页码：
收录情况： SCI
摘要： Plant senescence is a highly coordinated process that is intricately regulated by numerous endogenous and environmental signals. The involvement of phytic acid in various cell signaling and plant processes has been recognized, but the specific roles of phytic acid metabolism in Arabidopsis leaf senescence remain unclear. Here, we demonstrate that in Arabidopsis thaliana the multiple inositol phosphate phosphatase (AtMINPP) gene, encoding an enzyme with phytase activity, plays a crucial role in regulating leaf senescence by coordinating the ethylene signal transduction pathway. Through overexpressing AtMINPP (AtMINPP-OE), we observed early leaf senescence and reduced chlorophyll contents. Conversely, a loss-of-function heterozygous mutant (atminpp/+) exhibited the opposite phenotype. Correspondingly, the expression of senescence-associated genes (SAGs) was significantly upregulated in AtMINPP-OE but markedly decreased in atminpp/+. Yeast one-hybrid and chromatin immunoprecipitation assays indicated that the EIN3 transcription factor directly binds to the promoter of AtMINPP. Genetic analysis further revealed that AtMINPP-OE could accelerate the senescence of ein3-1eil1-3 mutants. These findings elucidate the mechanism by which AtMINPP regulates ethylene-induced leaf senescence in Arabidopsis, providing insights into the genetic manipulation of leaf senescence and plant growth.
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