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A LINEAR DICHROISM STUDY USING CHLOROPLASTS OF VARIOUS STRUCTURE and PIGMENT COMPOSITION
Author(s) -
FaludiDániel ÁGnes,
Breton Jacques
Publication year - 1975
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.1751-1097.1975.tb08823.x
Subject(s) - chloroplast , pigment , carotenoid , linear dichroism , circular dichroism , photosynthesis , spectral line , photosynthetic pigment , composition (language) , dichroism , chemistry , chlorophyll , biology , photochemistry , crystallography , biochemistry , botany , optics , physics , organic chemistry , gene , linguistics , philosophy , astronomy
— The orientation of pigments was studied in maize chloroplasts of different granum content and pigment composition. Comparison of the linear dichroism (LD)t of granal and agranal chloroplasts exhibited differences in the chl a forms, Ca 670 and Ca 691. The chl b content of the chloroplasts appeared to have little effect on the LD spectra. In the LD spectra of carotenoid deficient mutant chloroplasts, the red band corresponding to oriented Ca 678 was considerably smaller than in those of normal chloroplasts. LD spectra of lycopenic chloroplasts revealed a band at 740 nm not present in the spectra of normal chloroplasts. Various signals of carotenoids observed in the LD spectra of carotenoid deficient mutant chloroplasts imply that the different carotenoids can be oriented in a different manner in the photosynthetic membrane.