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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Elevation of glutathione level and activation of glutathione-related enzymes affect virus infection in tobacco.

The effects of two chemicals, L-2-oxothiazolidine-4-carboxylic acid (OTC) and (S)-carvone, were investigated on the development of necrotic symptoms and on the virus concentration in tobacco mosaic virus (TMV)-infected tobacco plants. OTC treatments markedly increased the cellular glutathione (GSH) levels in tobacco leaf discs. In addition, OTC pretreatment considerably decreased both the number of necrotic lesions and the virus content in TMV-infected leaf discs. The monoterpene (S)-carvone increased only slightly the GSH content of leaf tissues and caused lipid peroxidation. (S)-carvone dramatically induced the activity of glutathione S-transferase and to a lesser extent elevated also the activities of ascorbate peroxidase and glutathione reductase. Treatments with (S)-carvone strongly reduced the number and size of necrotic lesions, but did not influence the virus concentration. The results show that increased levels of GSH and activities of GSH-related enzymes by OTC and (S)-carvone reduce necrotization of virus-infected tissues. However, virus multiplication and lesion formation do not necessarily correlate: virus multiplication is suppressed only by substantially elevated GSH contents.[1]

References

  1. Elevation of glutathione level and activation of glutathione-related enzymes affect virus infection in tobacco. Gullner, G., Tóbiás, I., Fodor, J., Kömives, T. Free Radic. Res. (1999) [Pubmed]
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