Physiological control of trophophase-idiophase separation in streptomycete cultures producing secondary metabolites

Canadian Journal of Microbiology
X LiaoJ L Doull

Abstract

Cultures of Streptomyces coelicolor A3(2) produced actinorhodin in defined media with various carbon and nitrogen sources. Production occurred during biomass accumulation if assimilation of either the carbon or the nitrogen source limited the rate of growth. High growth rates tended to delay product synthesis until after biomass accumulation was complete, but fully biphasic fermentation profiles were achieved only with media supporting very rapid growth. The onset of actinorhodin production then coincided with a decline in the growth rate during transition of carbon-sufficient cultures to stationary phase. In cultures with maltose as a growth-limiting carbon source, depletion of phosphate increased the rate of actinorhodin biosynthesis, but did not alter the timing of its initiation. With defined media, the use of spores rather than vegetative mycelium as inocula reduced the overlap between trophophase and idiophase. The general guidelines for achieving biphasic production of actinorhodin in S. coelicolor A3(2) cultures could be used to obtain trophophase-idiophase separation in cultures of Streptomyces venezuelae producing chloramphenicol. However, the conditions needed to be modified to give optimized biphasic fermentations w...Continue Reading

References

Dec 1, 1983·Canadian Journal of Microbiology·S Shapiro, L C Vining
Feb 1, 1980·Journal of Bacteriology·J W Grootwassink, G M Gaucher
Jul 1, 1981·Canadian Journal of Microbiology·S Chatterjee, L C Vining
May 1, 1993·Canadian Journal of Microbiology·M A GlazebrookE G Chedrawy

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Citations

Feb 11, 2009·Biotechnology Progress·Beth JunkerNeal Connors
May 26, 2017·Applied Biochemistry and Biotechnology·Yong-Juan LiuZhong-Gui Mao
Jul 13, 2004·Biomacromolecules·Elizabeth Grillo FernandesEmo Chiellini

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