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THE LIGHT REQUIREMENT OF ACID‐BASE TRANSITION INDUCED LUMINESCENCE OF CHLOROPLASTS
Author(s) -
Mayne B. C.
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.tb05851.x
Subject(s) - luminescence , metastability , chloroplast , molecule , photochemistry , photosystem ii , chlorophyll , chemistry , photosynthesis , materials science , optoelectronics , biochemistry , organic chemistry , gene
— The luminescence that occurs when chloroplasts are taken from an acid environment to a basic one is shown to be dependent on prior illumination of the chloroplasts. The relation between the light absorbed and luminescence is given by the following equation L = L max (1‐e al where L and L max are the light emitted and maximum light emission at high flash energy, respectively, J quanta absorbed per chlorlphyll molecule, and α a constant with a value of approximately 200 chlorophyll molecules per quanta absorbed. The action spectrum of the luminescence is consistent with that of photosystem II. The metastable state formed during illumination decays in the dark via a temperature dependent second order process.