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KINETIC STUDIES OF THE TWO LIGHT REACTIONS IN PHOTOSYNTHESIS
Author(s) -
Kuntz I. D.,
Calvin Melvin
Publication year - 1965
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.1751-1097.1965.tb09771.x
Subject(s) - wavelength , absorbance , photosynthesis , kinetics , chemistry , excitation , red light , kinetic energy , visible spectrum , drop (telecommunication) , photochemistry , optics , physics , botany , biology , telecommunications , biochemistry , quantum mechanics , computer science
Abstract— The decay kinetics of the photo‐induced absorbance changes in red and green algae are very sensitive to the wavelength of the actinic light. A four to tenfold increase in half‐decay time is noted in going from short wavelength (550–650 mμ) to long wavelength (> 700 mμ) excitation. The slow decay rates produced by long wavelength light can be enhanced with a steady background of short wavelength light. A relationship between initial decay rates and O 2 evolution rates is described. This relationship allows a direct correspondence between these spectroscopic studies and the ‘red‐drop’ and ‘enhancement’ experiments of Emerson.