Sökning: "Symbiosis lichen"
Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Symbiosis lichen.
1. The puzzle of lichen symbiosis : Pieces from Thamnolia
Sammanfattning : Symbiosis brought important evolutionary novelties to life on Earth. Lichens, the symbiotic entities formed by fungi, photosynthetic organisms and bacteria, represent an example of a successful adaptation in surviving hostile environments. Yet many aspects of the lichen symbiosis remain unexplored. LÄS MER
2. Nitrogenase regulation and ultrastructure of heterocystous cyanobacteria : free-living and in lichen symbiosis
Sammanfattning : .... LÄS MER
3. Resource aquisition and allocation in lichens
Sammanfattning : Lichens are fascinating symbiotic systems, where a fungus and a unicellular alga, most often green (bipartite green algal lichens; 90% of all lichens), or a fi lamentous cyanobacterium (bipartite cyanobacterial lichens; 10% of all lichens) form a new entity (a thallus) appearing as a new and integrated organism: in about 500 lichens the fungus is associated with both a cyanobacterium and an alga (tripartite lichens). In the thallus, the lichen bionts function both as individual organisms, and as a symbiont partner. LÄS MER
4. Phylogeny, diversity and toxin production related to cyanobacterial symbioses
Sammanfattning : Phylogeny and morphology were examined for the cyanobionts from the water fern Azolla and the cyanobacterial genus Nostoc originating from symbioses with different host plants (genera Gunnera, Cycas, Dioon, Encephalarthos, Macrozamia, and Anthoceros), the lichen genus Pannaria, and free-living Nostoc isolates from different habitats. Nostoc isolates of Pannaria formed a closely related group, but, in general, no monophyletic nature was attributed to the genus Nostoc, in contrast to the cyanobionts from Azolla which were contained in a unique monophyletic group. LÄS MER
5. Hidden complexity of lichen symbiosis : insights into functionality, reproduction and composition
Sammanfattning : Lichens are tremendously diverse physical outcomes of symbiotic relationships involving fungi, algae and bacteria. This thesis aims to give insight into the functionality, composition and reproduction of lichens from the fungal perspective. LÄS MER