Os01g0527600

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The rice Os01g0527600 was reported as OsRDR6 in 2012 [1] by researchers from China.

Annotated Information

Gene Symbol

  • Os11g0267000 <=> OsRDR6,OsSHL2,RDR6,SHL2

Function

  • The rice OsRDR6 acts in the biogenesis of various types and sizes of small RNAs.
  • OsRDR6-dependent tasiR-ARFs play key roles in lemma development in rice.
  • OsRDR6 is required for the biogenesis of 24-nt phased small RNAs.
  • OsRDR6-dependent 24-nt phased small RNAs are independent of the RNA-directed DNA methylation (RdDM) pathway.
  • OsRDR6 mediates secondary small RNA biogenesis in rice.


  • The researchers identified a spontaneous rice mutant with pleiotropic spikelet defects, with most spikelets showing needle-shaped, awn-like lemma; this phenotype is similar to that of shl2-rol and osdcl4-1 mutants (Liu et al., 2007; Nogueira et al., 2007; Toriba et al., 2010).
  • Unlike the con- sistent spikelet defects in shl2-rol and osdcl4-1, the osrdr6-1 mutants showed various degrees of spikelet defects under different natural growth conditions.
  • The spikelet defects and altered stamen number of the mutant only occurred at high temperatures and under long-day conditions, as found in July in Hangzhou. Mutant plants were normal when grown in low temperatures and short-day conditions, as found in October at the same location .
  • The developmental defects of osrdr6-1 were rescued by a construct containing the full-length OsRDR6 genomic DNA; the transgenic plants ap- peared morphologically identical to wild-type Zhonghua11 (Figure 1b), confirming that the OsRDR6 locus is responsible for the mutant phenotype.


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Labs working on this gene

  • State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
  • Crop Molecular Breeding Center, the Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

References

  1. Song X, Wang D, Ma L, Chen Z, Li P, Cui X, Liu C, Cao S, Chu C, Tao Y, Cao X. Rice RNA-dependent RNA polymerase 6 acts in small RNA biogenesis and spikelet development. Plant J. 2012 Aug;71(3):378-89. doi: 10.1111/j.1365-313X.2012.05001.x. Epub 2012 Jun 5. PubMed PMID: 22443269.

Structured Information