Receptor-like kinase protein that regulates meristem size during inflorescence and flower development. Promotes vegetative meristem growth and restricts inflorescence and floral meristem growth. Based on additive and synergistic phenotypes of double mutants, it is probable that unlike CLV1 and CLV2 in A.thaliana, TD1 and FAE2 do not function exclusively in a single pathway. However, KN-1 and TD1 do function in a linear pathway to maintain vegetative meristem homeostasis, but they may interact with different partners during development. ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Highly expressed in the apex of the vegetative seedlings. Lower expression in young leaves, ears and tassels, embryos and roots. Not expressed in the shoot meristem itself. Detected in the three outermost layers of the inflorescence meristem, and on its flanks at positions of prospective spikelet pair meristems. Not confined to meristematic cells but also detected in primordia of glumes, lemmas and stamens. Fasciation. Flattened and wider ears with irregular rows of seeds. Thicker rachis of tassels and increased floral organ numbers. Reduced vegetative growth. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.