Receptor-like kinase that may play a role male and female sporogenesis. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Expressed in roots, leaves, shoots and spikelets. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.