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On the occurrence of peroxidase and laccase activity in lichens

Published online by Cambridge University Press:  25 February 2013

Richard P. BECKETT
Affiliation:
School of Life Sciences, University of KwaZulu-Natal, Private Bag X01, Pietermaritzburg, Scottsville 3209, South Africa. Email: rpbeckett@gmail.com
Farida V. MINIBAYEVA
Affiliation:
Kazan Institute of Biochemistry and Biophysics, Russian Academy of Sciences, PO Box 30, Kazan 420111, Russia
Christiane LIERS
Affiliation:
Unit of Environmental Biotechnology, International Graduate School of Zittau, Markt 23, 02763 Zittau, Germany

Abstract

In our earlier work, we demonstrated that the oxidases tyrosinase and laccase occur widely in lichens from the Peltigerales. Recently, we discovered the occurrence of another oxidoreductase, a heme peroxidase, in the Peltigeralean ‘jelly lichens’ Leptogium and Collema. Here we present the results of a survey of peroxidase activity in a range of lichens. In addition to the jelly lichens, strong peroxidase activity also occurs within the Peltigeralean genera Lobaria, Pseudocyphellaria and Sticta. Significant activity occurs in the cell wall, and, unlike laccase activity, peroxidase activity increases considerably following the rehydration of dry thalli. However, activity is absent from Peltigera and from the non-Peltigeralean species tested here. Electrophoretic investigation showed that lichen peroxidases are oligomeric. Possible roles for peroxidases in lichen biology are discussed.

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Type
Articles
Copyright
Copyright © British Lichen Society 2013

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