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The rice Os03g0315400 was reported as OsMYB2 in 2012 [1] by researchers from China.

Annotated Information

Figure 2. Real-time reverse-transcription (RT) PCR analysis for the expression of OsMYB2 in rice.[1].

Gene Symbol

  • Os03g0315400 <=> OsMYB2,MYB2


  • OsMYB2 encodes a stress-responsive MYB transcription factor.
  • OsMYB2 plays a regulatory role in tolerance of rice to salt, cold, and dehydration stress.

Phenotypic analysis

  • No difference in growth and development between the OsMYB2-overexpressing and wild-type plants was observed under normal growth conditions, but the OsMYB2-overexpressing plants were more tolerant to salt, cold, and dehydration stresses and more sensitive to abscisic acid than wild-type plants.
  • The OsMYB2-overexpressing plants accumulated greater amounts of soluble sugars and proline than wild-type plants under salt stress. Overexpression of OsMYB2 enhanced up-regulation of genes encoding proline synthase and transporters. The OsMYB2-overexpressing plants accumulated less amounts of H2O2 and malondialdehyde.
  • The enhanced activities of antioxidant enzymes, including peroxidase, superoxide dismutase, and catalase, may underlie the lower H2O2 contents in OsMYB2-overexpressing plants.
  • There was greater up-regulation of stress-related genes, including OsLEA3, OsRab16A, and OsDREB2A, in the OsMYB2-overexpressing plants. Microarray analysis showed that expression of numerous genes involving diverse functions in stress response was altered in the OsMYB2-overexpressing plants.


  • Expression of OsMYB2 was up-regulated by salt, cold, and dehydration stress.

Subcellular localization

  • OsMYB2 was localized in the nucleus with transactivation activity.
Figure 1. Subcellular localization and transactivation analysis of OsMYB2.[1].


  • OsMYB2 representative by LOC_Os3g20090 (Os03g0315400) is belong to C12, and of which are involved in stress response.

Labs working on this gene

  • State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, PR China
  • Graduate University of the Chinese Academy of Sciences, Beijing 100049, PR China


  1. 1.0 1.1 1.2 Yang A, Dai X, Zhang WH. A R2R3-type MYB gene, OsMYB2, is involved in salt, cold, and dehydration tolerance in rice. J Exp Bot. 2012 Apr;63(7):2541-56. doi: 10.1093/jxb/err431. PubMed PMID: 22301384; PubMed Central PMCID: PMC3346221.

Structured Information