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INTERACTION BETWEEN CRYPTOCHROME AND PHYTOCHROME IN HIGHER PLANT PHOTOMORPHOGENESIS
Author(s) -
Mancinelli Alberto L.
Publication year - 1989
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1989.tb11294.x
Subject(s) - photomorphogenesis , cryptochrome , phytochrome , biology , botany , blue light , biophysics , microbiology and biotechnology , red light , arabidopsis , genetics , physics , optics , gene , circadian clock , mutant
At least three photoreceptors are involved in the mediation of light action in higher plant photomorphogenesis: cryptochrome (UV‐A/blue light photoreceptor), UV‐B photoreceptor, and phytochrome. The degree of photoreceptor interaction in photomorphogenesis can apparently vary depending on the response, the species, and the stage of development of the biological system. In most cases of interaction studied so far, Pfr, the physiologically active form of phytochrome, is apparently required for the final expression of the response. In some systems, the cryptochrome and/or UV‐B photoreceptor mediated action of UV/blue radiation is required to establish/enhance/maintain responsiveness toward Pfr. There is no evidence for photoreceptor interaction in some response‐system combinations. It is not known for sure if this apparent lack of photoreceptor interaction represents a real situation or just a failure to detect it because of experimental limitations. Practically nothing is known about the mechanism of photoreceptor interaction at the molecular level.