Contribution
Nostoc in symbiosis - Taxonomic implications
Mollenhauer, Dieter; Mollenhauer, Resi
Algological Studies/Archiv für Hydrobiologie, Supplement Volumes No. 83 (1996), p. 435 - 446
36 références bibliographiques
publié: Dec 19, 1996
DOI: 10.1127/algol_stud/83/1996/435
ArtNo. ESP142011700028, Prix: 29.00 €
Abstract
A general survey is given of results from experiments on incorporation of different Nostoc strains by the fungus Geosiphon that shows close phylogenetic relation to arbuscular mycorrhiza forming fungi of the genus Glomus. Most of the Nostoc strains that can live endocytobiotically inside the cells of Geosiphon can also form symbiotic consortia with other macrosymbionts, phototrophs as well as heterotrophs. Many, however not all strains capable to establish symbiosis show specific characters of N. punctiforme. Incorporation of Nostoc into Geosiphon and further development inside the fungal cell induces interesting alteration of the cyanobacterium which suggest that common laboratory procedures fail to reveal all capacities of a given Nostoc strain. Traditional taxonomic approaches based on life-cycle, cell dimensions etc. are not sufficient for adequate categorization of cyanobacteria of the genus Nostoc. Molecular analysis of DNA by its own is not the final peal of wisdom. Well-known strains with complete information on their natural habitats and with traditional characterization including autecophysiological data should be used for further application of molecular techniques.
Mots-clefs
Taxonomy • endocytobiosis • Geosiphon • Nostoc • primordium stage of lifecycle • symbiosis