PLANT TRANSMEMBRANE RECEPTORS - NEW PIECES IN THE SIGNALING PUZZLE

The past few years have seen the mechanisms used by plants to transmit extracellular signals into the cytoplasm begin to be uncovered. Multi ple plant proteins have been identified that resemble the receptor pro tein kinases of animal cells. These are known as receptor-like protein kinases or RLKs. Variations in structure and patterns of synthesis of different RLKs suggest that these proteins are involved in mediating a variety of cellular signaling processes, can respond to diverse extr acellular signals and have different physiological functions.