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Plant height is an important morphological trait that affects crop yield. Several genes related to plant height and yield have been reported in rice ( Oryza sativa  L.), however, the molecular mechanism underlying the regulation of these traits is still not completely understood. VP64 is widely used as a transcriptional activator to investigate the biological function of genes encoding transcription factors. Here, we identified a novel bZIP transcription factor  OsbZIP62  that is involved in modulating agronomic traits in rice. Overexpression of  OsbZIP62-VP64  ( OsbZIP62V ) significantly increases the plant height and yield per plant in rice. RNA-seq analysis showed that some plant height and panicle development related genes (i.e.,  OsEATB ,  OsDSS1  and  OsGA3ox2 ) were up-regulated in  OsbZIP62V  overexpressing rice plants. Besides,  OsbZIP62  could also bind to the promoters of several putative target genes. These results suggested that  OsbZIP62  plays a role as transcriptional regulator in regulating the expression of genes associated with agronomic traits, and  OsbZIP62  fused with VP64 would be useful in crop genetic modification with improved plant architecture and yield.

Constitutive Activation OsbZIP62 Improves Plant Height and Yield through Regulating the Expression of Agronomic Traits Related Genes in Rice