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Algicidal properties of a bloom‐forming blue‐green alga, Oscillatoria sp.
Author(s) -
Bagchi Suvendra Nath,
Palod Archna,
Chauhan Vikas Singh
Publication year - 1990
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620300106
Subject(s) - oscillatoria , photosynthesis , botany , algae , algal bloom , biology , eutrophication , bloom , blue green algae , ether , chemistry , cyanobacteria , bacteria , phytoplankton , ecology , organic chemistry , genetics , nutrient
An isolate of Oscillatoria from local eutrophic lake exhibits strong growth inhibitory effects, when phototrophically co‐cultured with a green alga and other blue‐green algae, including its natural predecessor. This effect was not observed on selected heterotrophic‐organisms. The characteristic interaction was also demonstrated with culture filtrates and cell‐free extracts, implying this effect to be due to some chemical released from Oscillatlia. From the mid‐log growth phase of the culture, a nonproteinaceous, moderately heat stable, and ether soluble metabolite was extracted by ether extraction. The primary site of the growth inhibitory substance (algicide) action appears to be the photosynthetic oxygen evolution, tested in Anacystis nidutlans. The characteristic algicidal substance may have a role, in nature, in species dominance.