Gene Details:

• MSU gene ID: LOC_Os03g07250
• RAPdb gene ID: Os03g0168600
• Gene Symbol: CYP704B2
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Two genes CYP704B2 and WDA1, involved in the biosynthesis of very-long-chain fatty acids for the establishment of the anther cuticle and pollen exine, were downregulated in osabcg15 mutant, suggesting that OsABCG15 may play a key function in the processes related to sporopollenin biosynthesis or sporopollenin transfer from tapetal cells to anther locules.
• We report here the isolation and characterization of a rice (Oryza sativa) male sterile mutant, CYP704B2, which exhibits a swollen sporophytic tapetal layer, aborted pollen grains without detectable exine, and undeveloped anther cuticle.
• In addition, chemical composition analysis indicated that cutin monomers were hardly detectable in the CYP704B2 anthers.
• The CYP704B2 transcript is specifically detected in the tapetum and the microspore from stage 8 of anther development to stage 10.
• Cytochrome P450 family member CYP704B2 catalyzes the {omega}-hydroxylation of fatty acids and is required for anther cutin biosynthesis and pollen exine formation in rice.

Function-related keywords:

• cuticle ,  anther ,  tapetal ,  pollen ,  sterile ,  tapetum ,  anther-development ,  cutin ,  grain ,  microspore

Literature:

• The ATP-binding cassette transporter OsABCG15 is required for anther development and pollen fertility in rice .  DOI:  10.1111/jipb.12053 ;  PMID:  23570336
• Cytochrome P450 family member CYP704B2 catalyzes the {omega}-hydroxylation of fatty acids and is required for anther cutin biosynthesis and pollen exine formation in rice .  DOI:  10.1105/tpc.109.070326 ;  PMID:  20086189
• OsMS188 Is a Key Regulator of Tapetum Development and Sporopollenin Synthesis in Rice .  DOI:  10.1186/s12284-020-00451-y ;  PMID:  33409767

Related News:

Gene Resources:

• NCBI ID: NM_001055627
• UniProt accessions:

Sequences: