caa a22 4500 465790321 CHVBK 20180323112022.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF02017173 doi (NATIONALLICENCE)springer-10.1007/BF02017173 The Gunnera symbiosis: DNA restriction fragment length polymorphism and protein comparisons of Nostoc symbionts [Elektronische Daten] [William Zimmerman, Birgitta Bergman] Cyanobacteria separated from symbiosis with several species of the angiospermGunnera were comparatively characterized and correlated with the locales and taxonomy of their host plants. All were identified as strains ofNostoc. Protein profiles and DNA restriction fragment length polymorphisms (from hybridizations with heterologousnifH andglnA probes) determined that three of the four cyanobacteria fromGunnera grown at one site in Sweden, each from a different host species, were very similar or identical. Plants of one species,G. manicata, grown in a second location at the site were infected with a different cyanobiont. Among five isolates from two species ofGunnera, collected in the same locale in New Zealand, three subgroups were documented. Isolates from three differentGunnera species grown in separate locations in the United States were each uniquely different. None of the cyanobacteria differed in the molecular weights of their glutamine synthetase and Fe-nitrogenase proteins. The diversity and accessibility of compatibleNostoc populations present in the soil micro-environment, not a critical selective factor required byGunnera, were concluded to be a major determinant in symbiont selection. Springer-Verlag New York Inc., 1990 Zimmerman William Department of Agronomy & Soils, Washington State University, 99164-6420, Pullman, Washington, USA aut Bergman Birgitta Department of Physiological Botany, University of Uppsala, Box 540, S-751 21, Uppsala, Sweden aut Microbial Ecology Springer-Verlag 19/3(1990-05-01), 291-302 0095-3628 19:3<291 1990 19 248 https://doi.org/10.1007/BF02017173 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02017173 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zimmerman William Department of Agronomy & Soils, Washington State University, 99164-6420, Pullman, Washington, USA aut NATIONALLICENCE 700 1- Bergman Birgitta Department of Physiological Botany, University of Uppsala, Box 540, S-751 21, Uppsala, Sweden aut NATIONALLICENCE 773 0- Microbial Ecology Springer-Verlag 19/3(1990-05-01), 291-302 0095-3628 19:3<291 1990 19 248 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer