Over-expression of a C-terminal region of phytochrome B |
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Authors: | Koji Sakamoto Akira Nagatani |
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Institution: | (1) Laboratory for Photoperception and Signal Transduction, Frontier Research Program, Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, 351-01 Wako, Saitama, Japan;(2) Present address: Molecular Genetics Research Laboratory, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113, Tokyo, Japan |
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Abstract: | In an attempt to identify domains directly involved in the signal transduction of phytochrome B (phyB), we over-expressed the achromophoric C-terminal half of phyB under control of the CaMV-35S promoter in transgenicArabidopsis. In three independent transgenic lines, we detected accumulation of the introduced protein of predicted size at levels higher than that of the endogenous phyB by immunoblot analysis. Although these transgenic plants did not show any phenotype in the dark, enhancement of the phyB-dependent inhibition of hypocotyl elongation and reduction of the phytochrome A (phyA)-dependent inhibition were observed. |
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Keywords: | Arabidopsis photomorphogenesis phytochrome B signal transduction transgenic plants |
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