Surface phosphatase activity of peltigera and cladonia lichens

TL;DRAbstract

This study examines the effects of environmental factors on the surface phosphatase activities of the lichens Peltigera canina (L.) Willd., P. praetextata (Flōrke. ex Sommerf) Vain, and Cladonia arbuscula (Wallr.) Rabenh. Four plants of each species were collected in the U. K. from low (Middleton Common, Windy Nook) and high (Nenthead) Zn environments. The mean tissue (soil) Zn concentrations in P. canina, P. praetextata and C. arbuscula (high Zn) were 4.3 (18.9), 5.4 (25.4) and 4.1 (8.3) times higher respectively than the same species (low Zn).Phosphomonoesterase (PMEase) activity was measurable at all pH values in the range 3.0 - (10.3) 11.0 with 250 µM p-nitrophenyl phosphate (pNPP) and 250 µM 4-methylumbelliferyl phosphate (4-MUP) Both pNPP and 4-MUP showed maximum PMEase at pH: 10.3 in P. canina (low Zn), P. praetextata (low and high Zn); 6.0 in P. canina (high Zn), C. arbuscula (low Zn); 6.0-7.0 in C. arbuscula (high Zn). Maximum PMEase in P. canina and P. praetextata (high Zn

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