Gene Details:

• MSU gene ID: LOC_Os02g47470
• RAPdb gene ID: Os02g0703600
• Gene Symbol: OsABA8ox1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Treatment of aerobic seedlings with ethylene and its precursor, 1-aminocyclopropane-1-carboxylate (ACC), rapidly induced the expression of OsABA8ox1, but the ethylene treatment did not strongly affect the expression of ABA biosynthetic genes.
• Moreover, pre-treatment with 1-methylcyclopropene (1-MCP), a potent inhibitor of ethylene action, partially suppressed induction of OsABA8ox1 expression under submergence.
• Together, these results indicate that the rapid decrease in ABA levels in submerged rice shoots is controlled partly by ethylene-induced expression of OsABA8ox1 and partly by ethylene-independent suppression of genes involved in the biosynthesis of ABA.
• Ethylene promotes submergence-induced expression of OsABA8ox1, a gene that encodes ABA 8’-hydroxylase in rice.
• The oxidation of ABA to PA is catalyzed by ABA 8’-hydroxylase, which is possibly encoded by three genes (OsABA8ox1, -2 and -3) in rice.
• The ABA 8’-hydroxylase activity was confirmed in microsomes from yeast expressing OsABA8ox1.
• The ABA level was found to be negatively correlated with OsABA8ox1 expression under ACC or 1-MCP treatment.
• The mRNA level of OsABA8ox1, but not the mRNA levels of other OsABA8ox genes, increased dramatically within 1 h after submergence.

Function-related keywords:

• ethylene ,  shoot ,  ABA ,  seedling ,  submergence

Literature:

• Phosphorylation of D-allose by hexokinase involved in regulation of OsABF1 expression for growth inhibition in Oryza sativa L .  DOI:  10.1007/s00425-013-1853-9 ;  PMID:  23397192
• ABA regulates apoplastic sugar transport and is a potential signal for cold-induced pollen sterility in rice .  DOI:  10.1093/pcp/pcm100 ;  PMID:  17693452
• Ethylene promotes submergence-induced expression of OsABA8ox1, a gene that encodes ABA 8’-hydroxylase in rice .  DOI:  10.1093/pcp/pcm003 ;  PMID:  17205969
• Glucose-induced delay of seed germination in rice is mediated by the suppression of ABA catabolism rather than an enhancement of ABA biosynthesis .  DOI:  10.1093/pcp/pcp022 ;  PMID:  19208695
• Improving pre-harvest sprouting resistance in rice by editing OsABA8ox using CRISPR/Cas9 .  DOI:  10.1007/s00299-022-02917-3 ;  PMID:  35976402

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: