Rice GTPase OsRacB: Potential accessory factor in plant salt-stress signaling Academic Article uri icon


MeSH Major

  • Cytokines
  • Fetus
  • Immunity, Cellular
  • Obstetric Labor, Premature
  • Pregnancy Complications, Infectious


  • As the sole ubiquitous signal small guanosine triphosphate-binding protein in plants, Rop gene plays an important role in plant growth and development. In this study, we focus on the relationship between the novel rice Rop gene OsRacB and plant salt tolerance. 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. Promoter analysis showed that OsRacB promoter is induced by salinity and exogenous salicylic acid, not abscisic acid. To elucidate its physiological function, we generated OsRacB sense and antisense transgenic tobacco and rice. Under proper salinity treatment, sense transgenic plants grew much better than the control. This suggests that overexpression of OsRacB in tobacco and rice can improve plant salt tolerance. But under the same treatment, no difference could be observed between OsRacB antisense plants and the control. The results indicated that OsRacB is only an accessory factor in plant salt tolerance.

publication date

  • June 2006



  • Academic Article


Digital Object Identifier (DOI)

  • 10.1111/j.1745-7270.2006.00172.x

Additional Document Info

start page

  • 393

end page

  • 402


  • 38


  • 6