Hyeryung Yoon, Jungil Yang, Wanqi Liang, Dabing Zhang, Gynheung An
Abstract
Flower organ patterning is accomplished by spatial and temporal functioning of various regulatory genes. We previously reported thatOryza sativa VIN3-LIKE 2(OsVIL2) induces flowering by mediating the trimethylation of Histone H3 onLFL1chromatin. In this study, we report thatOsVIL2also 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 thatosvil2affected organ primordia formation during early spikelet development. Expression analysis revealed thatOsVIL2is 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 inosvil2. These results suggest thatOsVIL2 is required for proper expression of the regulatory genes that control floral organ number and morphology.
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