Gene Details:

• MSU gene ID: LOC_Os05g37690
• RAPdb gene ID: Os05g0449500
• Gene Symbol: OsCOI1b
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• We show that EG1 is a plastid-targeted lipase that participates in JA biosynthesis, and EG2/OsJAZ1 is a JA signalling repressor that interacts with a putative JA receptor, OsCOI1b, to trigger OsJAZ1’s degradation during spikelet development.
• Here, we use the OsCOI1b-1 knockout mutants to show that OsCOI1b mainly affects leaf senescence under senescence-promoting conditions.
• The Arabidopsis coi1-1 plants containing 35S:OsCOI1a or 35S:OsCOI1b rescued the delayed leaf senescence during dark incubation, suggesting that both OsCOI1a and OsCOI1b are required for promoting leaf senescence in rice.
• Mutation of Oryza sativa CORONATINE INSENSITIVE 1b (OsCOI1b) delays leaf senescence.
• The oscoi2 mutants, but not the oscoi1a and OsCOI1b mutants, exhibited severely low fertility, indicating the crucial role of OsCOI2 in rice fertility.
• Transcriptomic analysis revealed that the transcriptional changes after methyl jasmonate (MeJA) treatment were moderate in the leaves of oscoi2 mutants compared to those in the wild-type or oscoi1a and OsCOI1b mutants.
• OsCOI1b is involved in root growth and grain-size control and plays overlapping roles with OsCOI1a in spikelet development, while OsCOI2 regulates leaf senescence, male sterility, root growth, and grain size.

Function-related keywords:

• JA-receptor ,  leaf ,  senescence ,  leaf-senescence ,  fertility ,  jasmonate ,  methyl-jasmonate ,  root ,  growth ,  spikelet ,  grain ,  grain-size ,  root-growth ,  male-sterility ,  spikelet-development

Literature:

• Plant hormone jasmonate prioritizes defense over growth by interfering with gibberellin signaling cascade .  DOI:  10.1073/pnas.1201616109 ;  PMID:  22529386
• Mutation of Oryza sativa CORONATINE INSENSITIVE 1b (OsCOI1b) delays leaf senescence .  DOI:  10.1111/jipb.12276 ;  PMID:  25146897
• Magnaporthe oryzae systemic defense trigger 1 (MoSDT1)-mediated metabolites regulate defense response in Rice .  DOI:  10.1186/s12870-020-02821-6 ;  PMID:  33430779
• Genome Editing Reveals Both the Crucial Role of OsCOI2 in Jasmonate Signaling and the Functional Diversity of COI1 Homologs in Rice .  DOI:  10.1093/pcp/pcac166 ;  PMID:  36472361
• Functional dissection of rice jasmonate receptors involved in development and defense .  DOI:  10.1111/nph.18860 ;  PMID:  36869435

Related News:

Gene Resources:

• NCBI ID: AK101514
• UniProt accessions:

Sequences: