Gene Details:

• MSU gene ID: LOC_Os09g32944
• RAPdb gene ID: Os09g0507100
• Gene Symbol: OsSPL18
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Transcriptional activation experiments indicated that OsSPL18 is a functional transcription factor with activation domains in both the N-terminus and C-terminus, and both activation domains are indispensable for its biological functions.
• In this study, we studied the biological function of OsSPL18 during grain and panicle development in rice.
• Knockout (KO) mutants of OsSPL18 exhibited reduced grain width and thickness, panicle length and grain number, but increased tiller number.
• qRT-PCR and GUS staining analyses showed that OsSPL18 was highly expressed in developing young panicles and young spikelet hulls, in agreement with its function in regulating grain and panicle development.
• Both yeast one-hybrid and dual-luciferase (LUC) assays showed that OsSPL18 could bind to the DEP1 promoter, suggesting that OsSPL18 regulates panicle development by positively regulating the expression of DEP1.
• Cytological analysis showed that OsSPL18 regulates the development of spikelet hulls by affecting cell proliferation.
• OsSPL18 controls grain weight and grain number in rice.
• Quantitative expression analysis showed that DEP1, a major grain number regulator, was significantly down-regulated in OsSPL18 KO lines.

Function-related keywords:

• transcription-factor ,  panicle ,  spikelet ,  grain ,  tiller ,  development ,  grain-number ,  cell-proliferation ,  grain-weight ,  tiller-number ,  grain-width

Literature:

• OsSPL18 controls grain weight and grain number in rice .  DOI:  10.1016/j.jgg.2019.01.003 ;  PMID:  30737149

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: