Cell surface redox potential as a mechanism of defense against photosensitizers in fungi

Article Abstract:

Cercosporin derives its toxicity from its ability to form superoxides in the presence of light. This phytotoxin causes harm to plants, mice and many other fungi but not to the Cercospora species that produce it. The molecular mechanism behind the fungal pathogens' resistance against the toxin involves the oxidation-reduction reaction in its biological system which correlates to its mechanism of defense. Results of studies show that reduction reaction occurs at the cell surface reducing environment which renders the toxin unstable. After it diffuses away from the reducing power of the cell surface, it reoxidizes and becomes toxic. This transient reduction and detoxification protect the fungi that produce it.

Health aspects, Research, Oxidation-reduction reaction, Oxidation-reduction reactions, Mycotoxins, Defense reaction (Physiology), Mycotoxicoses

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Efficacy of burning, tillage and biocides in controlling bacteria released at field sites and effects on indigenous bacteria and fungi

Article Abstract:

The effect of burning and biocides, alone and in combination with tillage, on various bacteria sprayed on plant leaves were determined using samples taken one day before and up to 30 days after treatment. Results show that burning and burning combined with tillage caused the greatest reduction of bacterial populations. Examinations also revealed that biocides affect both applied and indigenous bacteria and fungi. These suggest that more selective methods of field decontamination should be developed.

Environmental aspects, Control, Microorganisms, Biocides, Tillage, Cultivation (Land), Burning of land

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Rhizobacterial volatiles affect the growth of fungi and Arabidopsis thaliana

Article Abstract:

The effect of various rhizobacterial volatiles obtained from different species on the growth of many fungi and Arabidopsis thaliana is examined. The analysis reveals that such bacterial volatiles help in the growth of new compounds with antibiotic and growth-promoting features.

Analysis, Rhizobium, Arabidopsis thaliana

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