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CONTROL OF HYPOCOTYL GROWTH IN MUSTARD SEEDLINGS AFTER LIGHT‐DARK TRANSITIONS
Author(s) -
SCHAUFER E.,
EBERT C.,
SCHWEITZER M.
Publication year - 1984
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.1751-1097.1984.tb03410.x
Subject(s) - sinapis , phytochrome , hypocotyl , darkness , reversion , white light , rhythm , red light , far red , photoperiodism , elongation , biophysics , botany , biology , visible spectrum , physics , chemistry , optics , biochemistry , brassica , materials science , ultimate tensile strength , gene , acoustics , metallurgy , phenotype
— Six hours of irradiation with white or far‐red light strongly stimulates the ‘end of day’ inhibition of hypocotyl elongation in dark grown Sinapis alba L. Measurements of both reversion kinetics of the inductive light pulse and ‘null point’ experiments (Hillman, 1965. 1972) indicate that this response is controlled by stable phytochrome. The extent of the reversible response (i. e. length after far‐red light minus length after red light) showed rhythmic oscillations after a 6, 48 and 54 h white light pretreatment. The rhythm is started by the transition from light to dark and neither phase nor amplitude is influenced by the level of P at this transition.