Gene Details:

Functional Descriptions:

  • Results show that OsRacB transcription is highly accumulated in roots after treatment with salinity, but only slightly accumulated in stems and leaves under the same treatment.
  • A dramatic down-regulation in the OsRacB transcripts was also found in plants inoculated with the blast pathogen, Magnaporthe grisea.
  • Interestingly, transgenic rice plants over-expressing OsRacB showed increased symptom development in response to rice blast pathogens.
  • In this study, we focus on the relationship between the novel rice Rop gene OsRacB and plant salt tolerance.
  • This suggests that overexpression of OsRacB in tobacco and rice can improve plant salt tolerance.
  • The results indicated that OsRacB is only an accessory factor in plant salt tolerance.
  • Rice GTPase OsRacB: Potential Accessory Factor in Plant Salt-stress Signaling.
  • Promoter analysis showed that OsRacB promoter is induced by salinity and exogenous salicylic acid, not abscisic acid.
  • The basal mRNA level of OsRacB in LS of two-week-old seedlings was strongly down-regulated upon wounding by cut and treatment with jasmonic acid.
  • To our interest in finding a negative ROP regulator of disease resistance in rice, we applied a phylogeny of function approach to rice Rops, and identified OsRacB based on its close genetic orthologous relationship with the barley HvRacB gene, a known negative regulator of disease resistance.
  • Based on these results, we suggest that OsRacB functions as a potential regulator for a basal disease resistance pathway in rice.
  • Functional characterization of OsRacB GTPase–a potentially negative regulator of basal disease resistance in rice.
  • The knockout mutants were normal in anther and pollen development but defective in the pollen grain germination, suggesting a specific and non-redundant role of OsRacB in the mature pollen.
  • A small Rho GTPase OsRacB is required for pollen germination in rice.
  • We further demonstrated that OsRacB is directly activated by the pollen specific expressing OsRopGEFs in vitro.

Literature:

Gene Resources:

Sequences:

cDNA Sequence
  • >LOC_Os02g02840.1 cDNA GGCCACCTCCTCCACCCACCTCACCCACCACCTCTCTCTCTACTCCTCCTCTTCTCCTCCTCCGTCTCGAGCGAGCTCTCTCCTTCCTTGTCTCGGGTCTCGGCATTGCATTTGCATTGGGGGGCATTGCTATTGCTTCGCTTGCGCTTGGCCACCCACCATTTCGGCGCGGAGAGGAGACCGCTTCACCCGCCGATCTGCGAGAAACCCTCTCCGCCTCGCCTCCTCCACCTCCCAATCTTAACCCAACCTCCCCCCTTCCTCTCGCGTCGACCCCTTGCTTTGCTCCTCCTTCAACCTTCTTCTTTCTTGGAGTTTCTTGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGAGGGGGGAGCGGTCGCAGGAGGAGGAGGACGGCGGCGTCTGCTGCGACCGACGGGGAGCGGCGAGGATGAGCGCGTCCAGGTTCATAAAGTGCGTCACCGTCGGGGACGGCGCCGTCGGCAAGACCTGCATGCTCATCTCCTACACCTCCAACACCTTCCCCACTGATTATGTTCCGACGGTGTTTGACAACTTCAGTGCCAACGTCGTGGTTGATGGTAACACCGTCAACCTCGGGCTATGGGACACTGCAGGTCAGGAGGATTACAACAGACTGAGACCACTGAGTTATCGTGGAGCTGATGTTTTCCTTCTGGCCTTCTCGCTAATCAGCAAGGCCAGCTATGAGAATGTTTCAAAGAAGTGGATACCTGAGCTGAAGCATTATGCACCTGGTGTGCCTATCATCCTTGTGGGAACAAAGCTTGATCTTCGAGATGACAAGCAGTTTTTTGTGGACCATCCTGGTGCTGTTCCTATCACCACTGCTCAGGGAGAGGAACTAAGAAAGCAAATAGGCGCCCCATACTACATCGAATGCAGCTCAAAGACCCAACTAAACGTCAAGGGCGTTTTCGATGCGGCAATAAAGGTGGTGCTGCAGCCACCCAAGGCGAAGAAGAAGAAAAAGGCGCAAAGGGGGGCGTGCTCCATTTTGTGATCTAATCATCAGTAGACGACGAAGAAGAAGAACGATGAAGTTGCCAGGCTTTATTATTGTTGCGTCTTGCTTCAGCGAAACAGCATTCATGGTCCGGGGATCCTAGTTTACTGGCAGCTGCAGCAAGGCCTCTTTGTCGAGGCAATGAGCGATCCGTTTGTTTCATTTTCTCCTTTCTGCCTTGTGATTATCTCGTGTGACTGACAAGTCGTGGCAATTAGGTAACTTTCCTAGATGGTATTTCCTGTGTTTGAGAAAAAAAATTCTTGTTATCCCTGTTTCATAAGTAGACATGATGTAATCGCACTCAGTTTATTCTTTTCCTTCTTATTTCACTTCAATGGAAAATTATGTTTCCCCTTCATATTCTGTTCTGCAAATGGAGCAAGATCTGTGATGTTCTTCTGACT
CDS Sequence
  • >LOC_Os02g02840.1 CDS ATGAGCGCGTCCAGGTTCATAAAGTGCGTCACCGTCGGGGACGGCGCCGTCGGCAAGACCTGCATGCTCATCTCCTACACCTCCAACACCTTCCCCACTGATTATGTTCCGACGGTGTTTGACAACTTCAGTGCCAACGTCGTGGTTGATGGTAACACCGTCAACCTCGGGCTATGGGACACTGCAGGTCAGGAGGATTACAACAGACTGAGACCACTGAGTTATCGTGGAGCTGATGTTTTCCTTCTGGCCTTCTCGCTAATCAGCAAGGCCAGCTATGAGAATGTTTCAAAGAAGTGGATACCTGAGCTGAAGCATTATGCACCTGGTGTGCCTATCATCCTTGTGGGAACAAAGCTTGATCTTCGAGATGACAAGCAGTTTTTTGTGGACCATCCTGGTGCTGTTCCTATCACCACTGCTCAGGGAGAGGAACTAAGAAAGCAAATAGGCGCCCCATACTACATCGAATGCAGCTCAAAGACCCAACTAAACGTCAAGGGCGTTTTCGATGCGGCAATAAAGGTGGTGCTGCAGCCACCCAAGGCGAAGAAGAAGAAAAAGGCGCAAAGGGGGGCGTGCTCCATTTTGTGA
Protein Sequence
  • >LOC_Os02g02840.1 protein MSASRFIKCVTVGDGAVGKTCMLISYTSNTFPTDYVPTVFDNFSANVVVDGNTVNLGLWDTAGQEDYNRLRPLSYRGADVFLLAFSLISKASYENVSKKWIPELKHYAPGVPIILVGTKLDLRDDKQFFVDHPGAVPITTAQGEELRKQIGAPYYIECSSKTQLNVKGVFDAAIKVVLQPPKAKKKKKAQRGACSIL*