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Encodes a receptor-like kinase RPK2 (also known as TOADSTOOL 2/TOAD2). Functions as a regulator of meristem maintenance. Mutants are insensitive to synthetic CLV3 peptide. Mutations in the RPK2 also result in stem cell expansion and increased number of floral organs, as seen in the other clv mutants. Forms homo-oligomers.
First detected in the central domain protodermal cells when cotyledon primordia become recognizable, at the early globular stage. Later observed throughout the central domain and basal domain of the embryo proper. After bolting, localized in axillary buds and premature anthers. Abundant in the tapetum of wild-type anthers during microspore maturation.
Key regulator of anther development (e.g. lignification pattern), including tapetum degradation during pollen maturation (e.g. germination capacity). Together with RPK1, required for pattern formation along the radial axis (e.g. the apical embryonic domain cell types that generate cotyledon primordia), and the apical-basal axis (e.g. differentiation of the basal pole during early embryogenesis).