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OsLCD3 interacts with OsSAMS1 to regulate grain size via ethylene/polyamine homeostasis control.

Authors :
Hu, Wenli
Wang, Rong
Hao, Xiaohua
Li, Shaozhuang
Zhao, Xinjie
Xie, Zijing
Wu, Sha
Huang, Liqun
Tan, Ying
Tian, Lianfu
Li, Dongping
Source :
Plant Journal. May2024, p1. 15p. 8 Illustrations.
Publication Year :
2024

Abstract

SUMMARY A fundamental question in developmental biology is how to regulate grain size to improve crop yields. Despite this, little is still known about the genetics and molecular mechanisms regulating grain size in crops. Here, we provide evidence that a putative protein kinase‐like (OsLCD3) interacts with the S‐adenosyl‐L‐methionine synthetase 1 (OsSAMS1) and determines the size and weight of grains. OsLCD3 mutation (lcd3) significantly increased grain size and weight by promoting cell expansion in spikelet hull, whereas its overexpression caused negative effects, suggesting that grain size was negatively regulated by OsLCD3. Importantly, lcd3 and OsSAMS1 overexpression (SAM1OE) led to large and heavy grains, with increased ethylene and decreased polyamines production. Based on genetic analyses, it appears that OsLCD3 and OsSAMS1 control rice grain size in part by ethylene/polyamine homeostasis. The results of this study provide a genetic and molecular understanding of how the OsLCD3‐OsSAMS1 regulatory module regulates grain size, suggesting that ethylene/polyamine homeostasis is an appropriate target for improving grain size and weight. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09607412
Database :
Academic Search Index
Journal :
Plant Journal
Publication Type :
Academic Journal
Accession number :
176984077
Full Text :
https://doi.org/10.1111/tpj.16788