Gene Details:

• MSU gene ID: LOC_Os09g29930
• RAPdb gene ID: Os09g0475400
• Gene Symbol: OsBIM1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Overexpression of OsBIM1 significantly increases rice leaf angles, whereas the T-DNA knock-out mutant OsBIM1 and wide type (WT) showed similar leaf inclination.
• Gene expression analysis showed that the overexpression of OsBIM1 significantly increased the transcripts of INCREASED LEAF INCLINATION1 (OsILI1) that functions as a key transcription factor promoting BR signaling and response.
• The promoting effect of OsBIM1 overexpression on leaf angle can still be observed at harvest stage, but overexpression of OsBIM1 resulted in smaller grain size and reduced yield.
• OsBIM1 overexpression enhances the sensitivity and response to BR treatment in rice.
• Meanwhile, OsBIM1 inhibited the expression of DWARF2 (OsD2, a key enzyme in BR biosynthesis pathway).
• OsBIM1 can bind with OsILI1 promoter and enhance OsILI1 expression in response to BR treatment.
• These results indicate that OsBIM1 functions as a positive regulator in BR signaling, and its overexpression increases rice lamina inclination by promoting BR sensitivity and response.

Function-related keywords:

• leaf ,  transcription-factor ,  grain ,  yield ,  grain-size ,  BR ,  BR-signaling ,  lamina ,  leaf-angle

Literature:

• A bHLH protein, OsBIM1, positively regulates rice leaf angle by promoting brassinosteroid signaling .  DOI:  10.1016/j.bbrc.2021.09.035 ;  PMID:  34562652

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: