We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
SMS2 , a Novel Allele of OsINV3 , Regulates Grain Size in Rice.
- Authors
Huang, Jianzhi; Zhou, Zelong; Wang, Ying; Yang, Jing; Wang, Xinyue; Tang, Yijun; Xu, Ran; Li, Yunhai; Wu, Lian
- Abstract
Grain size has an important effect on rice yield. Although several key genes that regulate seed size have been reported in rice, their molecular mechanisms remain unclear. In this study, a rice small grain size 2 (sms2) mutant was identified, and MutMap resequencing analysis results showed that a 2 bp insertion in the second exon of the LOC_Os02g01590 gene resulted in a grain length and width lower than those of the wild-type Teqing (TQ). We found that SMS2 encoded vacuolar acid invertase, a novel allele of OsINV3, which regulates grain size. GO and KEGG enrichment analyses showed that SMS2 was involved in endoplasmic reticulum protein synthesis, cysteine and methionine metabolism, and propionic acid metabolism, thereby regulating grain size. An analysis of sugar content in young panicles showed that SMS2 reduced sucrose, fructose, and starch contents, thus regulating grain size. A haplotype analysis showed that Hap2 of SMS2 had a longer grain and was widely present in indica rice varieties. Our results provide a new theoretical basis for the molecular and physiological mechanisms by which SMS2 regulates grain size.
- Subjects
GRAIN size; RICE; METHIONINE metabolism; PHYSIOLOGY; ALLELES; PROPIONIC acid
- Publication
Plants (2223-7747), 2024, Vol 13, Issue 9, p1219
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants13091219