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DHARA is an online index of articles on Ayurveda published in research journals worldwide.
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Proceedings of the National Academy of Sciences of the United States of America
2010
Nov
;
(45)
:0
Linking differential domain functions of the GS3 protein to natural variation of grain size in rice.
Mao H
,
Sun S
,
Yao J
,
Wang C
,
Yu S
,
Xu C
,
Li X
,
Zhang Q
Abstract
Grain yield in many cereal crops is largely determined by grain size. Here we report the genetic and molecular characterization of GS3, a major quantitative trait locus for grain size. It functions as a negative regulator of grain size and organ size. The wild-type isoform is composed of four putative domains: a plant-specific organ size regulation (OSR) domain in the N terminus, a transmembrane domain, a tumor necrosis factor receptor/nerve growth factor receptor (TNFR/NGFR) family cysteine-rich domain, and a von Willebrand factor type C (VWFC) in the C terminus. These domains function differentially in grain size regulation. The OSR domain is both necessary and sufficient for functioning as a negative regulator. The wild-type allele corresponds to medium grain. Loss of function of OSR results in long grain. The C-terminal TNFR/NGFR and VWFC domains show an inhibitory effect on the OSR function; loss-of-function mutations of these domains produced very short grain. This study linked the functional domains of the GS3 protein to natural variation of grain size in rice.
DHARA ID:
D016285
Pubmed ID:
20974950
Access to Full Paper Not Available
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