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PREVENTION BY PHYTOCHROME OF PHOTODELAY IN CHLOROPHYLL ACCUMULATION
Author(s) -
OelzeKarow H.,
Rösch H.,
Mohr H.
Publication year - 1983
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1983.tb04519.x
Subject(s) - phytochrome , sinapis , chlorophyll , red light , white light , chlorophyll a , botany , far red , chemistry , biophysics , biology , optics , physics , brassica
A photodelay in chlorophyll‐ a and ‐b accumulation is observed in mustard ( Sinapis alba L.) cotyledons during the first 3 h after the onset of white light even at medium light fluxes (3500 lx). A pretreatment of two red light pulses or a 12 h far‐red light pretreatment, both operating through phytochrome. prevent the photodelay completely. This is a specific phytochrome effect since'it can be separated from the effects of phytochrome on the rates during pre‐steady state and steady state phases of chlorophyll accumulation in saturating white light. Thus, photostability of chlorophyll in nature is a photoresponse mediated through phytochrome.