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THE UPTAKE OF MANNITOL AND SORBITOL BY A SPECIES OF CHLORELLA (CHLOROPHYCEAE) 1
Author(s) -
Colman Brian,
Brickell Peter C.,
Gehl Katharina A.
Publication year - 1986
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.1529-8817.1986.tb02486.x
Subject(s) - chlorophyceae , biology , chlorella pyrenoidosa , sorbitol , mannitol , chlorella vulgaris , urea , sodium azide , photosynthesis , botany , algae , chlorella , respiration , heterotroph , biochemistry , chlorophyta , bacteria , genetics
Chlorella saccharophila ( Krüger) Nadson takes up mannitol and sorbitol in the light and the dark. The rate of uptake is concentration dependent. is not affected by pH in the range pH 6.0 to 8.0 and ii not stimulated by light. Uptake is inhibited by the respiration inhibitor sodium azide (10 ‐2 M) but not by 3‐(3,4‐dichlorophenyl)‐1,1‐di‐methyl urea (10 ‐6 M), an inhibitor of photosynthesis. Sorbitol. but not mannitol, stimulates the rate of dark respiration but both support the heterotrophic growth of the alga. Both compounds permeate the cells of C. miniata. and two strains of C. pyrenoidosa but do not support the heterotrophic growth of these algae. The cells of C. vulgaris are impermeable to both compounds .