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Photo:ValÚrie Reeb

Visitors : Ilse Kranner

July 1999

Ilse Kranner
Ph.D
Institute of Plant Physiology
University of Graz, Austria

Ilse Kranner visited the Field Museum in July 1999. This visit was part of a long-term co-operation with Franšois Lutzoni within her research projects on desiccation tolerance of plants and lichens ("Antioxidants and desiccation tolerance: A new approach to mycobiont-photobiont symbiotic associations"). One of the project goals was to study the role of the antioxidant system in the evolution of lichens.

The main purposes of Ilse Kranners visit to the lab of Franšois Lutzoni were to perform desiccation experiments with the lichenized mushroom Omphalina hudsoniana and its isolated Coccomyxa photobiont, and with the non-lichenized species Omphalina veluptipes when grown in axenic culture. In addition, they also organized a trip to the subarctic station at Schefferville (Canada) to collect the lichen material required for the experiments.

In a joint paper, Kranner and Lutzoni (1999) conclude that only such fungal lineages that possess outstanding antioxidant systems are capable of undergoing the transition from the non-lichenized to the lichenized state.

Research projects
- APART 428 (Austrian Programme for Advanced Research and Technology), funded by the Austrian Academy of Sciences (ÍAW)
- P12690-BIO, funded by the Austrian Science Foundation (FWF)

Publications
Kranner I. and Lutzoni F. 1999. Evolutionary consequences of transition to a lichen symbiotic state and physiological adaptation to oxidative damage associated with poikilohydry. In Lerner H.R. (ed) Plant Response to Environmental Stress: From Phytohormones to Genome Reorganization, M. Dekker Inc., New York, pp. 591-628.


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