Community structure and antibiotic production of Streptomyces nodosus bioreactors cultured in liquid environments.
Bottom Line: When cell proliferation was encouraged, substrate hyphae were found inside the alginate matrix and within multicellular projections on the surface of the capsule.These organisms sporulated with reduced antibiotic production compared with free-dwelling cultures.The commitment to sporulate was independent of a surface but dependent on community size and nutritional status.
Affiliation: University of Western Sydney, School of Natural Sciences, Parramatta Campus, Locked Bag 1797, Penrith South DC 1797 NSW, Australia.Show MeSH
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Mentions: On solid media, it has been postulated that aerial hyphae emerge from substrate mycelial masses not only to aid dispersion of spores but also to explore new environments for growth opportunities (Yeo and Chater, 2005). These reconnoitring hyphae are consistent with the hyphal forms seen on the surface of the protrusions associated with the surface of the capsules (Fig. 6). It is not known whether their formation is to scout for new environments or to increase the surface area of the biomass exposed to the liquid environment for nutrient uptake and translocation to the rest of the community.
Affiliation: University of Western Sydney, School of Natural Sciences, Parramatta Campus, Locked Bag 1797, Penrith South DC 1797 NSW, Australia.