Gene Details:

• MSU gene ID: LOC_Os01g08320
• RAPdb gene ID: Os01g0178500
• Gene Symbol: OsIAA1
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Indica) OsIAA1 cDNA as a monocot member of the Aux/IAA gene family.
• The predicted amino acid sequence of OsIAA1 corresponds to a protein of ca.
• Northern blot analysis revealed that the OsIAA1 transcript levels decrease in the excised coleoptile segments on auxin starvation, and the level is restored when auxin is supplemented; the increase in OsIAA1 transcript level was apparent within 15 to 30 min of auxin application.
• Auxin-induced OsIAA1 expression appears to be correlated with the elongation of excised coleoptile segments.
• In light-grown rice seedlings, OsIAA1 is preferentially expressed in roots and basal segment of the seedling, whereas in the etiolated rice seedlings, the OsIAA1 transcripts are most abundant in the coleoptile.
• A comparative analysis in light- and dark-grown seedling tissues indicates that the OsIAA1 transcript levels decrease on illumination.
• OsIAA1, an Aux/IAA cDNA from Rice, and Changes in Its Expression as Influenced by Auxin and Light.
• In addition, the OsIAA1-overexpression transgenic plants showed distinctive morphological changes such as decreased plant height and loose plant architecture.
• T-DNA insertion mutant of OsARF1 showed reduced sensitivity to BR treatment, resembling the phenotype of OsIAA1-overexpression plants.
• Over-expression of OsIAA1 in rice resulted in reduced inhibition of root elongation to auxin treatment, but increased sensitivity to 24-epiBL treatment.
• In addition, expression patterns of some genes responsive to brassinosteroid and auxin were changed in the OsIAA1-overexpression plants.
• These data suggested that OsIAA1 may play important roles in the cross-talk of auxin and brassinosteroid signaling pathways and plant morphogenesis.
• Characterization of OsIAA1 gene, a member of rice Aux/IAA family involved in auxin and brassinosteroid hormone responses and plant morphogenesis.
• Moreover, yeast two-hybrid and bimolecular fluorescence complementation assays showed that OsTIR1 and OsAFB2 interact with OsIAA1.
• This work focused on isolation and characterization of a member of Aux/IAA family in rice named OsIAA1.
• The results indicated that OsIAA1 was constitutively expressed in all the tissues and organs investigated.
• Protein interaction analysis suggested that OsIAA1 may act through interaction with OsARF1.

Function-related keywords:

• iaa ,  height ,  BR ,  auxin ,  seedling ,  brassinosteroid ,  root ,  architecture

Literature:

• Characterization of OsIAA1 gene, a member of rice Aux/IAA family involved in auxin and brassinosteroid hormone responses and plant morphogenesis .  DOI:  10.1007/s11103-009-9474-1 ;  PMID:  19266169
• OsIAA1, an Aux/IAA cDNA from rice, and changes in its expression as influenced by auxin and light .  DOI:  10.1093/dnares/8.5.193 ;  PMID:  11759839
• Ectopic overexpression of an AUXIN/INDOLE-3-ACETIC ACID (Aux/IAA) gene OsIAA4 in rice induces morphological changes and reduces responsiveness to Auxin .  DOI:  10.3390/ijms140713645 ;  PMID:  23812082
• Distinctive expression patterns and roles of the miRNA393/TIR1 homolog module in regulating flag leaf inclination and primary and crown root growth in rice (Oryza sativa) .  DOI:  10.1111/j.1469-8137.2012.04248.x ;  PMID:  22846038
• Functional analysis of auxin receptor OsTIR1/OsAFB family members in rice grain yield, tillering, plant height, root system, germination, and auxinic herbicide resistance .  DOI:  10.1111/nph.17061 ;  PMID:  33135782
• Rice EIL1 interacts with OsIAAs to regulate auxin biosynthesis mediated by the tryptophan aminotransferase MHZ10/OsTAR2 during root ethylene responses .  DOI:  10.1093/plcell/koac250 ;  PMID:  35972379

Related News:

Gene Resources:

• NCBI ID: AK100800
• UniProt accessions:

Sequences: