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PHOTOBIOLOGIE DU MESOCOTYLE D'AVOINE–IV. SPECTRES D'ACTION ET EFFICACITE QUANTIQUE DE LA LUMIERE
Author(s) -
SANDMEIER M.
Publication year - 1968
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.1751-1097.1968.tb08027.x
Subject(s) - wavelength , blue light , physics , action spectrum , phytochrome , red shift , red light , radiation , absorption (acoustics) , pigment , chemistry , optics , photochemistry , astrophysics , biology , botany , organic chemistry , galaxy
— The wavelengths most active in influencing the growth of segments of oat mesocotyl are 435 nm (blue), 665 nm (red) and 730 nm (far red). Using a high‐energy source (1.5 × 10 18 quanta/cm 2 ), an inhibition in all areas of the spectrum except the far red was obtained. The efficiency of the different radiations was studied: blue light is the most active, red and far red have about the same efficiency; green is a thousand times less active. The effect induced by blue light cannot be directly attributed to phytochrome, because the wavelength of maximum effect does not correspond with that of maximum absorption of the pigment (there is 55 nm difference); also, blue light is more active than the red radiation.