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LOW TEMPERATURE ABSORPTION SPECTRUM STUDIES: LIGHT‐INDUCED PIGMENT CHANGES IN PORPHYRIDIUM CULTURES
Author(s) -
HOARAU J.,
LECLERC J. C.
Publication year - 1973
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.1751-1097.1973.tb06374.x
Subject(s) - pigment , monochromatic color , absorption (acoustics) , absorption spectroscopy , algae , materials science , chlorophyll a , absorption band , photosynthesis , chlorophyll , analytical chemistry (journal) , chemistry , optics , botany , biology , chromatography , physics , organic chemistry , composite material
— A single‐beam spectrophotometer with a low‐temperature sample chamber has been built. An automatic mechanical device gives a suitable baseline and allows very reproducible absorption spectra to be obtained. The red alga Porphyridium grown, during a few days, under high‐intensity monochromatic light, showed a decrease in the amount of chlorophyll a forms directly or indirectly excited. Furthermore, a 585 nm absorption band is observed in red algae such as Porphyridium, Rhodymenia and Calliblepharis. This 585 nm band is labile to many damaging agents.