Plant and Cell Physiology, 1991, Vol. 32, No. 7 1119-1122
© 1991
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Phytochrome B Is Not Detectable in the hy3 Mutant of Arabidopsis, Which Is Deficient in Responding to End-of-Day Far-Red Light Treatments
1The Laboratory of Plant Biological Regulation, Frontier Research Program, RIKEN Institute Hirosawa 2-1, Wako City, Saitama, 351-01 Japan
2Plant Biology Laboratory, The Salk Institute for Biological Studies San Diego, California 92138, U.S.A.
Immunoblot analysis using a monoclonal antibody specific to phytochrome B (phyB) suggest that this protein is undetectable in the hy3 mutant of Arabidopsis. Photophysiological experiments revealed that hy3 mutants do not display end-of-day far-red growth responses. Thus, this particular phytochrome response seems to be mediated in large part by phyB.
(Received September 20, 1991; Accepted September 26, 1991)
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