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Rice FERONIA-LIKE RECEPTOR 3 and 14 affect grain quality by regulating redox homeostasis during endosperm development

文献类型： 外文期刊

作者： He, Wei 1 ; Li, Wanjing 1 ; Luo, Xiao 2 ; Tang, Yuqin 1 ; Wang, Long 2 ; Yu, Feng 2 ; Lin, Qinlu 1 ;

作者机构： 1.Cent South Univ Forestry & Technol, Natl Engn Lab Rice & Byprod Deep Proc, Changsha 410004, Peoples R China

2.Hunan Univ, Coll Biol, Key Lab Plant Funct Genom & Dev Regulat, Changsha 410082, Hunan, Peoples R China

3.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China

关键词： FERONIA-like receptor; grain chalkiness; grain quality; high temperature; programmed cell death; redox homeostasis; reactive oxygen species

期刊名称：JOURNAL OF EXPERIMENTAL BOTANY （ 影响因子：6.9； 五年影响因子：8.0 ）

ISSN： 0022-0957

年卷期： 2023 年 74 卷 10 期

页码：

收录情况： SCI

摘要： Chalky endosperm negatively affects the appearance, milling, and eating qualities of rice (Oryza sativa L.) grains. Here, we report the role of two receptor-like kinases, FERONIA-LIKE RECEPTOR 3 (FLR3) and FERONIA-LIKE RECEPTOR 14 (FLR14), in grain chalkiness and quality. Knockouts of FLR3 and/or FLR14 increased the number of white-core grains caused by aberrant accumulation of storage substances, resulting in poor grain quality. Conversely, the overexpression of FLR3 or FLR14 reduced grain chalkiness and improved grain quality. Transcriptome and metabolome analyses showed that genes and metabolites involved in the oxidative stress response were significantly up-regulated in flr3 and flr14 grains. The content of reactive oxygen species was significantly increased in flr3 and flr14 mutant endosperm but decreased in overexpression lines. This strong oxidative stress response induced the expression of programmed cell death (PCD)-related genes and caspase activity in endosperm, which further accelerated PCD, resulting in grain chalkiness. We also demonstrated that FLR3 and FLR14 reduced grain chalkiness by alleviating heat-induced oxidative stress in rice endosperm. Therefore, we report two positive regulators of grain quality that maintain redox homeostasis in the endosperm, with potential applications in breeding rice for optimal grain quality. Rice FLR3 and FLR14 positively regulate grain quality via maintaining endosperm redox homeostasis and alleviate endosperm oxidative stress caused by high temperature.

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