Mechanism of light sensing and signaling mediated by phytochrome and its interacting proteins in plants

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The novel zinc finger proteins were identified by protein interaction screening with phytochromes. The mutants having T-DNA insertion in the corresponding genes showed late flowering phenotype. The genetic analysis indicated the genes regulated FT expression as downstream factors of phytochrome B. The studies of temporal and spatial expression, phenotypic complementation with the modified genes indicated the proteins functioned in the nucleus in vascular tissue. Our finding gives insight on the link between light environment and development in growth control.