The miR5810/OsMRLP6 regulatory module affects rice seedling photosynthesis

IF 6 1区农林科学 Q1 AGRONOMY Crop Journal Pub Date : 2023-12-01 DOI:10.1016/j.cj.2023.08.004

Weiwei Gao , Mingkang Li , Huaping Cheng , Kuaifei Xia , Mingyong Zhang

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Abstract

Photosynthesis affects crop growth and yield. The roles of microRNAs (miRNAs) in photosynthesis are little known. In the present study, the role of the OsNF-YB7–OsMIR5810–OsMRLP6 regulatory module in photosynthesis was investigated. The malectin-like protein gene OsMRLP6 was identified as a target gene of osa-miR5810 (miR5810). Overexpression in rice of miR5810 or down-expression of OsMRLP6 resulted in reduced expression of genes involved in chloroplast development and photosynthesis and decreased net photosynthetic rate, finally leading to lower shoot biomass and grain yield. Down-expression of miR5810 and overexpression of OsMRLP6 showed the opposite effect. Overexpression of transcription factor OsNF-YB7 elevated expression of OsMIR5810 in rice seedlings by binding to its promoter. The OsNF-YB7–OsMIR5810–OsMRLP6 regulatory module affects photosynthesis to mediate growth and grain yield.

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miR5810/OsMRLP6 调控模块影响水稻幼苗的光合作用

光合作用影响作物的生长和产量。人们对微小 RNA（miRNA）在光合作用中的作用知之甚少。本研究调查了 OsNF-YB7-OsMIR5810-OsMRLP6 调控模块在光合作用中的作用。研究发现麦拉蛋白样蛋白基因 OsMRLP6 是osa-miR5810（miR5810）的靶基因。在水稻中过表达 miR5810 或向下表达 OsMRLP6 会导致参与叶绿体发育和光合作用的基因表达减少，净光合速率降低，最终导致嫩枝生物量和谷物产量降低。降低 miR5810 的表达和过表达 OsMRLP6 则显示出相反的效果。转录因子 OsNF-YB7 与 OsMIR5810 启动子结合，过量表达 OsMIR5810 会提高其在水稻幼苗中的表达量。OsNF-YB7-OsMIR5810-OsMRLP6调控模块影响光合作用，从而介导生长和谷物产量。

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来源期刊

Crop Journal Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

9.90

自引率

3.00%

发文量

638

审稿时长

41 days

期刊介绍： The major aims of The Crop Journal are to report recent progresses in crop sciences including crop genetics, breeding, agronomy, crop physiology, germplasm resources, grain chemistry, grain storage and processing, crop management practices, crop biotechnology, and biomathematics. The regular columns of the journal are Original Research Articles, Reviews, and Research Notes. The strict peer-review procedure will guarantee the academic level and raise the reputation of the journal. The readership of the journal is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic levels.