Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4412702 | Chemosphere | 2009 | 6 Pages |
Abstract
The results of a study aimed at investigating the effects of boron excess on a set of ecophysiological parameters in the lichen Xanthoria parietina, to set up a monitoring system to trace early biological effects of boron pollution in geothermal areas, are reported. To this purpose, lichen thalli have been incubated for 24Â h in solutions at boron concentrations of 0.1, 1, 10 and 100Â ppm, which were within the range in bulk deposition and geothermal fluids. The results showed a general trend of decreasing sample viability and increasing cell membrane damage and membrane lipid peroxidation under increasing boron concentrations, while photosynthetic efficiency, chlorophyll degradation and the contents of H2O2 and water-soluble proteins were not affected. It was argued that the fungal partner, that represents the large majority of the lichen biomass, is more sensitive to boron excess than the algal partner.
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Authors
Tommaso Pisani, Silvana Munzi, Luca Paoli, Martin BaÄkor, Stefano Loppi,