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Influence of environmental stress on lipofuscin production
Abstract:
The Corollospora maritima, a marine ascomycete, has been used as an experimental model to investigate the possibility that age pigments can be considered indicators also of environmental stress. Synthetic sea water enriched with iron or copper has been inoculated in a broth culture of the fungus. After 5 days of incubation the mycetes were assayed for lipofuscin fluorescent pigment and malondialdehyde content. The presence in the culture medium of the heavy metal ions results in an increase of the lipofuscin and malondialdehyde production. The same evidence has been obtained with sea water samples collected at seven sites along the coast of the Gulf of Naples (Italy): the lipofuscin and malondialdehyde production increases proportionally with the copper and iron pollution in the sea water.
Insights
Marine fungi like Corollospora maritima can indicate environmental stress. Heavy metals such as iron and copper increase the production of age pigments, including lipofuscin and malondialdehyde, in these organisms.
Area of Science:
- Environmental Science
- Marine Biology
- Mycology
Background:
- Age pigments, such as lipofuscin, are traditionally associated with aging.
- Environmental stressors can impact cellular processes and potentially influence pigment accumulation.
Purpose of the Study:
- To investigate Corollospora maritima as a model organism for detecting environmental stress.
- To determine if age pigments and malondialdehyde levels correlate with heavy metal pollution.
Main Methods:
- Culturing the marine fungus Corollospora maritima in synthetic seawater with added iron or copper.
- Analyzing fungal samples for lipofuscin and malondialdehyde content after incubation.
- Testing seawater samples from the Gulf of Naples for heavy metal concentrations.
Main Results:
- Enriching culture media with iron or copper significantly increased lipofuscin and malondialdehyde production in C. maritima.
- Lipofuscin and malondialdehyde levels in the fungus correlated positively with iron and copper pollution levels in natural seawater samples.
Conclusions:
- Corollospora maritima can serve as a sensitive bioindicator of heavy metal pollution.
- Age pigments and malondialdehyde are reliable markers of environmental stress induced by heavy metals in marine fungi.
