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INFLUENCE OF GROWTH STATUS AND NUTRIENTS ON EXTRACELLULAR POLYSACCHARIDE SYNTHESIS BY THE SOIL ALGA CHLAMYDOMONAS MEXICANA (CHLOROPHYCEAE) 1
Author(s) -
Kroen William K.,
Rayburn William R.
Publication year - 1984
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.0022-3646.1984.00253.x
Subject(s) - chlorophyceae , biology , polysaccharide , chlamydomonas , extracellular , nitrogen , extracellular polysaccharide , nutrient , algae , biochemistry , botany , ecology , chlorophyta , mutant , chemistry , organic chemistry , gene
Increased levels of nitrogen in liquid growth medium bring about increased growth and a delay in extracellular polysaccharide production by Chlamydomonas mexicana Lewin on a per‐cell basis. Addition of nitrogen to stationary phase cultures causes renewed growth and a temporary lag in polysaccharide synthesis until growth again ceases. Removal of nitrogen terminates growth, causing an immediate increase in polysaccharide synthesis. Phosphate‐starved cells show a response similar to nitrogen‐starved cells, indicating that the beginning of stationary phase and not nitrogen depletion causes the stimulation in extracellular polysaccharide synthesis. As similar results are assumed to occur on soil, the significance of this response is discussed.