Metabolic response to desiccation stress in strains of green algal photobionts (Trebouxia) from two Antarctic lichens of southern habitats
| Autor: | Sieglinde Ott, Tabea Mettler-Altmann, Andres Sadowsky |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Trebouxia Usnea biology Ecology Plant Science Aquatic Science biology.organism_classification 01 natural sciences Desiccation tolerance 03 medical and health sciences 030104 developmental biology Habitat Parmeliaceae Botany Green algae Desiccation Lichen 010606 plant biology & botany |
| Zdroj: | Phycologia. 55:703-714 |
| ISSN: | 2330-2968 0031-8884 |
| Popis: | Desiccation tolerance is a feature of most lichens. These symbiotic associations of a fungal partner (mycobiont) and a photosynthetic partner (photobiont) experience severe desiccation on a regular basis. Many lichen species colonise extreme habitats, such as the cold deserts of Antarctica. Although the stress physiology of lichens has been studied extensively, little is known about the photobionts' physiological potential. To assess the contribution of photobionts to lichen success in Antarctic terrestrial environments, the photosynthetic partners of Umbilicaria decussata (Umbilicariaceae, lichenised ascomycetes) and Usnea lambii (Parmeliaceae, lichenised ascomycetes) from extreme habitats in southern Antarctica were isolated. Significant differences regarding stress tolerance of the two green algae had been shown previously despite their close phylogenetic relationship. A deeper understanding and explanation of these differences were obtained by examination of the metabolite profiles and dynam... |
| Databáze: | OpenAIRE |
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