Abstract
Streptomyces avermitilis was cultivated at different concentrations (0–12%) of NaCl in the medium and the content of fatty acids, production of odorous compounds and avermectins were measured. With increasing medium salinity the content of monoenoic fatty acids, particularly palmitoleic acid, increased while the quantity of branched fatty acids dropped. The production of avermectin was constant up to 0.5% of the salt in the medium and then it strongly decreased, reaching zero at 2.5% salt. The biosynthesis of oxolones and geosmin differed: the content of oxolones increased with growing salinity whereas the production of geosmin dropped.
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