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SPECTRAL CHANGES IN CHLOROPLASTS DURING AGING
Author(s) -
Brody S. S.
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.tb04523.x
Subject(s) - absorbance , thylakoid , chloroplast , photosynthesis , chlorophyll , carotenoid , biophysics , wavelength , chemistry , pigment , chlorophyll a , photochemistry , materials science , botany , biology , biochemistry , chromatography , optoelectronics , gene , organic chemistry
The spectral properties of photosynthetic and accessory pigments of chloroplasts can change significantly over the course of an experiment which may last a couple of hours. As chloroplasts age at room temperature, there are decreases in absorbance at 708, 678, 510, 484, 465 and 432 nm. Chlorophylls absorbing at long wavelength (708 nm) and carotenoids (510 nm) are most sensitive to the aging process. The decrease in absorbance at 510 nm could indicate that aging results in a decrease in electrical potential across the thylakoid membrane.