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Community structure and antibiotic production of Streptomyces nodosus bioreactors cultured in liquid environments.

Pereira T, Nikodinovic J, Nakazono C, Dennis GR, Barrow KD, Chuck JA - Microb Biotechnol (2008)

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.

View Article: PubMed Central - PubMed

Affiliation: University of Western Sydney, School of Natural Sciences, Parramatta Campus, Locked Bag 1797, Penrith South DC 1797 NSW, Australia.

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Related in: MedlinePlus

Model of Streptomyces at a solid–air or solid–liquid interface. Vegetative or substrate hyphae associated with a solid surface show infrequent branching and septation. Hyphae emerging from this biomass (termed ‘aerial hyphae’ at a solid–air interface) have infrequent septa and an indeterminate fate. These hyphae can develop into branched reproductive/sporogenic hyphae with frequent double‐walled septa or continue growing forming branched hyphae, infrequent septation and no commitment to sporulation (reconnoitring hyphae).
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f6: Model of Streptomyces at a solid–air or solid–liquid interface. Vegetative or substrate hyphae associated with a solid surface show infrequent branching and septation. Hyphae emerging from this biomass (termed ‘aerial hyphae’ at a solid–air interface) have infrequent septa and an indeterminate fate. These hyphae can develop into branched reproductive/sporogenic hyphae with frequent double‐walled septa or continue growing forming branched hyphae, infrequent septation and no commitment to sporulation (reconnoitring hyphae).

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.


Community structure and antibiotic production of Streptomyces nodosus bioreactors cultured in liquid environments.

Pereira T, Nikodinovic J, Nakazono C, Dennis GR, Barrow KD, Chuck JA - Microb Biotechnol (2008)

Model of Streptomyces at a solid–air or solid–liquid interface. Vegetative or substrate hyphae associated with a solid surface show infrequent branching and septation. Hyphae emerging from this biomass (termed ‘aerial hyphae’ at a solid–air interface) have infrequent septa and an indeterminate fate. These hyphae can develop into branched reproductive/sporogenic hyphae with frequent double‐walled septa or continue growing forming branched hyphae, infrequent septation and no commitment to sporulation (reconnoitring hyphae).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3815244&req=5

f6: Model of Streptomyces at a solid–air or solid–liquid interface. Vegetative or substrate hyphae associated with a solid surface show infrequent branching and septation. Hyphae emerging from this biomass (termed ‘aerial hyphae’ at a solid–air interface) have infrequent septa and an indeterminate fate. These hyphae can develop into branched reproductive/sporogenic hyphae with frequent double‐walled septa or continue growing forming branched hyphae, infrequent septation and no commitment to sporulation (reconnoitring hyphae).
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.

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.

View Article: PubMed Central - PubMed

Affiliation: University of Western Sydney, School of Natural Sciences, Parramatta Campus, Locked Bag 1797, Penrith South DC 1797 NSW, Australia.

Show MeSH
Related in: MedlinePlus