OsIAA9

• Symbol: OsIAA9
• MSU: LOC_Os02g56120
• RAPdb: Os02g0805100

• LOC_Os02g56120.1: 0.2107
• LOC_Os02g56120.2: 0.2107
• LOC_Os02g56120.3: 0.4971

• LOC_Os02g56120.1: 0
• LOC_Os02g56120.2: 0
• LOC_Os02g56120.3: 0

• 66.72

• Constitutive Expression of OsIAA9 Affects Starch Granules Accumulation and Root Gravitropic Response in Arabidopsis., 2015, Front Plant Sci.

Genbank accession number

• Constitutive Expression of OsIAA9 Affects Starch Granules Accumulation and Root Gravitropic Response in Arabidopsis.
• Transgenic Arabidopsis plants expressing OsIAA9 have increased number of lateral roots, and reduced gravitropic response
• Taken together, our study showed that OsIAA9 is a transcriptional repressor, and it regulates gravitropic response when expressed in Arabidopsis by regulating granules accumulation and distribution in root tips
• Further analysis showed that OsIAA9 transgenic Arabidopsis plants accumulated fewer granules in their root tips and the distribution of granules was also affected
• RT-PCR results showed that expression of OsIAA9 was induced by exogenously applied auxin, suggesting that OsIAA9 is an auxin response gene
• When transfected into protoplasts isolated from rosette leaves of Arabidopsis, OsIAA9 repressed reporter gene expression, and the repression was partially released by exogenously IAA
• By generating transgenic plants expressing GFP-OsIAA9 and examining florescence in the transgenic plants, we found that OsIAA9 is localized in the nucleus
• Bioinformatic analysis showed that OsIAA9 has a repressor motif in Domain I, a degron in Domain II, and the conserved amino acid signatures for protein-protein interactions in Domain III and Domain IV