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Differential sensitivity of lichens to heavy metals

Differential sensitivity of lichens to heavy metals

Annals of Botany (London) 52(1): 51-58

Zn, Cd and Cu inhibited photosynthesis in lichens containing cyanobacterial phycobionts at substantially lower concentrations than those causing decreased photosynthesis in lichens containing chlorophycean phycobionts. This distinction was not related to differences in total thallus concentrations of Zn Mg, Ca or K or to the quantity of Zn taken up to intracellular sites. When incubated with concentrated Zn solutions, the chlorophycean lichen Cladonia rangiformis accumulated more Zn on extracellular exchangeable sites than did the cyanobacterial lichen Peltigera horizontalis.

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Accession: 001336326

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