Desiccation Tolerance of Aeroterrestrial Green Algae

a1_gesamtAeroterrestrial soil algae are important components of soil crusts growing in high alpine habitats. The organisms like the green alga Klebsormidium sp. have to face periods of desiccation. In this project the ability to tolerate desiccation in the vegetative state is investigated at the physiological as well as cell biological level. Upon desiccation photosynthesis is reduced to a minimum, whereas upon rehydration initial levels are gained within a few hours. These observations go along with maintenance of the organelle integrity of chloroplasts and the nucleus. Severe rearrangements are observed in the cytoskeleton.

Experimentally desiccation is tested either by controlled drying or by osmotic stress followed by measurements of the photosynthetic oxygen production and transmission electron microscopy.

Funding
Universitätszentrum Obergurgl
Tiroler Wissenschaftsfonds
FWF (Austrian Science Fund) P-24242 PI: Andreas Holzinger

Europe PubMed Central

Cooperation
Louise Lewis, Storrs, USA
Ulf Karsten, Rostock, Germany
Fabio Rindi, Ancona, Italy
Burkhard Becker, Cologne, Germany
Martina Pichrtová, Prague, Czech Republik
Rosalina Stancheva, San Marcos, CA, USA
Robert G Sheath, San Marcos, CA, USA
John D Hall, Maryland, USA
Richard M McCourt, Philadelphia, USA

Personnel involved
Andreas Holzinger
Beatrix Jungwirth
Klaus Herburger
Kathrin Blaas

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