Effects of carbon source, phosphorus concentration, and several micronutrients on biomass and geosmin production by Streptomyces halstedii |
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Authors: | K K Schrader W T Blevins |
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Institution: | (1) Department of Botany and Microbiology, College of Sciences and Mathematics, Auburn University, Auburn, AL 36849, USA, US |
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Abstract: | The effects of various carbon sources, phosphorus concentration, and different concentrations of the micronutrients calcium,
cobalt, copper, iron, manganese, potassium, and zinc were determined on biomass dry weight production, geosmin production,
and geosmin/biomass (G/B) values for Streptomyces halstedii, a geosmin-producing actinomycete isolated from the sediment of an aquaculture pond. Of the substrates tested, maltose as
a sole carbon source promoted maximal growth by S. halstedii while mannitol promoted maximal geosmin production, and galactose yielded the highest G/B values. Fish-food pellets and galactose
were poor substrates for growth. Increasing phosphorus concentrations enhanced geosmin production and G/B values. Of the seven
micronutrients tested, zinc, iron, and copper had the most profound effects on biomass and geosmin production. Increasing
zinc concentrations promoted biomass production while inhibiting geosmin production and G/B values; increasing concentrations
of copper and iron inhibited biomass and geosmin production. Increased copper concentrations had the greatest effect in preventing
growth and geosmin production by S. halstedii. Journal of Industrial Microbiology & Biotechnology (2001) 26, 241–247.
Received 20 September 2000/ Accepted in revised form 17 January 2001 |
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Keywords: | : actinomycete biomass production geosmin micronutrients off-flavor Streptomyces halstedii |
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