OsCPK21 regulates rice pollen development

To identify the molecular mechanism of OsCPK21 regulating pollen development, a genome-wide analysis of the gene expression profiles in the rice spikelet of ZH11 and OsCPK21-RNAi transgenic plants during anther development was performed. Hybridization with the microarray and subsequent analysis showed that a total of 5020 genes displayed altered expression (at least 2-fold) under suppressed OsCPK21 expression. Among the altered genes, 1419 were up-regulated, and 3601 were down-regulated.

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