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Flower organ patterning is accomplished by spatial and temporal functioning of various regulatory genes. We previously reported that  Oryza sativa VIN3-LIKE 2  ( OsVIL2 ) induces flowering by mediating the trimethylation of Histone H3 on  LFL1  chromatin. In this study, we report that  OsVIL2  also plays crucial roles during spikelet development. Two independent lines of T-DNA insertional mutants in the gene displayed altered organ numbers and abnormal morphology in all spikelet organs. Scanning electron microscopy showed that  osvil2  affected organ primordia formation during early spikelet development. Expression analysis revealed that  OsVIL2  is expressed in all stages of the spikelet developmental. Transcriptome analysis of developing spikelets revealed that several regulatory genes involved in that process and the formation of floral organs were down-regulated in  osvil2 . These results suggest that  OsVIL 2 is required for proper expression of the regulatory genes that control floral organ number and morphology.

OsVIL2 Regulates Spikelet Development by Controlling Regulatory Genes in Oryza sativa