ERECTA family proteins: the bridge in plant aerial morphogenesis

Receptor-like kinases (RLKs) were found to participate in multiple signaling pathways and are considered one of the most critical parts of the early event of intercellular signaling. Of the many, the ERECTA family (ERf) consists of three genes: ERECTA, ERL1and ERL2. Each of the three genes can combine with other proteins to regulate multiple signaling pathways from plant growth, development, and environmental adaptation. Although it is indispensable, the detailed information about ERf manipulated signaling pathways is still largely elusive. Here we are tempted to summarize the essential roles of ERf in aerial morphogenesis, including shoot apical meristem, stem, and reproductive organ development. This review would provide better insights into the role of ERf in modulating several intercellular signaling pathways.