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Plant and Cell Physiology, 2002, Vol. 43, No. 4 367-371
© 2002 Oxford University Press

Blue Light-Induced Chloroplast Relocation

Takatoshi Kagawa1,2 and Masamitsu Wada2,3,4

1 "Unit Process and Combined Circuit", PRESTO, Japan Science and Technology, Corporation, 1-8, Honcho 4-chome, Kawaguchi-city, Saitama, 332-0012 Japan 2 Division of Biological Regulation and Photobiology, National Institute for Basic Biology, Okazaki, 444-8585 Japan 3 Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo, 192-0397 Japan

Chloroplast relocation movement is induced by blue light in most plants tested. Under weak light, chloroplasts move toward a brighter area in a cell (called low-fluence-rate response or accumulation movement), but they avoid strong light and move away from the light (called high-fluence-rate response or avoidance movement). Recently, mutants deficient in the chloroplast avoidance movement were isolated from Arabidopsis thaliana. The results of mutant analyses revealed that the phototropin photoreceptors phot1 and phot2 both control chloroplast accumulation while phot2 alone controls the avoidance movements.

4 Corresponding author: E-mail, wada-masamitsu@c.metro-u.ac.jp; Fax, +81-426-77-2559.


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