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Impact of Simulated Acid Rains on Nitrogenase Activity in Peltigera Aphthosa and P. Polydactyla

Published online by Cambridge University Press:  28 March 2007

R. P. Fritz-Sheridan
R. P. Fritz-Sheridan
Affiliation:
Department of Botany, University of Montana, Missoula, Montana 59812, U.S.A.
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Abstract

Two ubiquitous diazotrophic North American lichens, Peltigera aphthosa and P. polydaclyla, were subjected to simulated acid rain. Both lichens exhibited a 50% reduction in nitrogen fixation at pH 5, 80% reduction at pH 4 and complete inhibition at pH 2. Nitrogen fixation was zero after 20 days exposure to simulated rain at pH 3 and zero after fourdays at pH 2.

Type
Research Article
Information
The Lichenologist , Volume 17 , Issue 1 , February 1985 , pp. 27 - 31
Copyright
Copyright © British Lichen Society 1985

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