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KINETICS OF CHLOROPHYLL a AND PLASTOQUINONE A: CHANGES IN RESPONSE TO LIGHT INTENSITY 1
Author(s) -
Sheridan R. P.
Publication year - 1972
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1972.tb04019.x
Subject(s) - biology , light intensity , phycocyanin , plastoquinone , chlorophyll a , synechococcus , photosynthesis , botany , chlorophyll , cyanobacteria , chloroplast , biochemistry , thylakoid , physics , bacteria , gene , optics , genetics
SUMMARY The thermophilic blue‐green Synechococcus lividus Y52 was grown at several light intensities between 200 and 2400 ft‐c. A 3.4‐fold change of cellular chlorophyll (Chl) a content was found. The concentration of Plastoquinone A (PQA) per Chl a varied by a factor of 7, whereas PQA per cell varied by 1.4. Adaptation to light intensity appeared to occur through changes in size of the light‐gathering antenna of chlorophyll and phycocyanin while the concentration of PQA remained nearly constant.