MicroRNA regulation of gene expression in plants.

It has only been a few years since we began to appreciate that microRNAs provide an unanticipated level of gene regulation in both plants and metazoans. The high level of complementarity between plant microRNAs and their target mRNAs has allowed rapid progress towards the elucidation of their varied biological functions. MicroRNAs have been shown to regulate diverse developmental processes, including organ separation, polarity, and identity, and to modulate their own biogenesis and function. Recently, they have also been implicated in some processes outside of plant development.