Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology A
violet pigment produced by certain bacteria.
Etymologies
Sorry, no etymologies found.
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Examples
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Lab experiments last year showed that J. liv produces a metabolite, violacein, that is toxic to the chytrid fungus.
NYT > Global Home By ERICA REX 2010
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Lab experiments last year showed that J. liv produces a metabolite, violacein, that is toxic to the chytrid fungus.
NYT > Home Page By ERICA REX 2010
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In a prior study Janthinobacterium lividum was identified as a bacterium that produces the anti-B. dendrobatidis metabolite violacein.
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While violacein benefits the host directly, it is also known to be toxic against protozoa, and fungi.
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In a prior study Janthinobacterium lividum was identified as a bacterium that produces the anti-B. dendrobatidis metabolite violacein.
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The bacterially produced metabolite violacein is associated with survival of amphibians infected with a lethal fungus.
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There is a correlation between violacein production, biofilm formation, and greater survival, suggesting that it may play a role in response to environmental stress.
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Results showed that adding J. lividum to the skin of the salamander increased the concentration levels of violacein already present and contributed to survival following experimental exposure to the fungus.
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Colonies are purplish-black due to its water-insoluble pigment called violacein.
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"Our study suggests that a threshold violacein concentration of about 18 μM on a salamander's skin prevents mortality and morbidity caused by B. dendrobatidis," say the researchers.
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