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We report an investigation into the effect on membrane integrity and chlorophyll fluorescence of extra- and intracellular lead (Pb) concentrations in lichens possessing different photosynthetic symbionts and thallus growth forms (Lobaria pulmonaria, Ramalina farinacea, Parmelia caperata and Peltigera canina). Pb uptake, particularly in cyanobiont lichens, caused a decrease in photosystem II (PSII)...
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