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The Influence of pH and Lichen Metabolites (Vulpinic Acid and (+) Usnic Acid) on the Growth of the Lichen Photobiont Trebouxia Irregularis

Published online by Cambridge University Press:  28 March 2007

M. Bačkor ,
J. Hudá ,
M. Repčák ,
W. Ziegler§  and
M. Bačkorová
M. Bačkor
Affiliation:
Department of Plant Physiology, Faculty of Natural Sciences,Comenius University, Mlynská dolina B-2, SK-842 15 Bratislava, Slovak Republic Department of Experimental Botany and Genetics, Faculty of Natural Sciences, Šafárik University, Mánesova 28, SK-041 67 Košsice, Slovak Republic, (correspondence address) E-mail: [email protected].
J. Hudá
Affiliation:
Department of Plant Physiology, Faculty of Natural Sciences,Comenius University, Mlynská dolina B-2, SK-842 15 Bratislava, Slovak Republic
M. Repčák
Affiliation:
Department of Experimental Botany and Genetics, Faculty of Natural Sciences, Šafárik University, Mánesova 28, SK-041 67 Košsice, Slovak Republic, (correspondence address) E-mail: [email protected].
W. Ziegler§
Affiliation:
Department of Biophysics and Chemical Physics, Comenius University, Mlynská dolina F-l, SK-842 15 Bratislava, Slovak Republic
M. Bačkorová
Affiliation:
Department of Plant Physiology, Faculty of Natural Sciences,Comenius University, Mlynská dolina B-2, SK-842 15 Bratislava, Slovak Republic
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Abstract

The quantitative response to two lichen metabolites, vulpinic acid and (+) usnic acid, on biomass production by the photobiont Trebouxia irregularis, isolated from the lichen Cladina mitis, was determined experimentally. The presence of usnic acid resulted in inhibition of photobiont growth, and the effect depended on the pH of the culture medium. The concentration effect of usnic acid was observed. The application of vulpinic acid almost completely inhibited the growth of T.irregularis and no significant differences were found among samples at different medium pH values.

Type
Research Article
Information
The Lichenologist , Volume 30 , Issue 6 , November 1998 , pp. 577 - 582
Copyright
Copyright © British Lichen Society 1992

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