Parallel variation in isoenzyme and nitrogen fixation markers in a Rhizobium population

Twenty isolates of Rhizobium leguminosarum bv. viceae were isolated at random from one field and examined for symbiotic plasmid fragment length polymorphisms and for isoenzyme patterns. The latter are most probably chromosome markers. With one exception both methods separated the isolates into the s...

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Bibliographic Details
Published in:Plant and soil 1990-11, Vol.128 (2), p.283-286
Main Authors: Engvild, K.C. (Risoe National Lab., Roskilde (Denmark). Dept. of Agricultural Research), Jensen, E.S, Skoet, L
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Dehydrogenases
Economic plant physiology
Electrophoresis
FIJACION DEL NITROGENO
FIXATION DE L'AZOTE
Fundamental and applied biological sciences. Psychology
Gels
ISOENZIMAS
ISOENZYME
ISOENZYMES
NITROGEN FIXATION
Nodules
Peas
PISUM SATIVUM
Plasmids
Population structure
Restriction fragment length polymorphism
Rhizobium
RHIZOBIUM LEGUMINOSARUM
Short communications
Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
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Summary:Twenty isolates of Rhizobium leguminosarum bv. viceae were isolated at random from one field and examined for symbiotic plasmid fragment length polymorphisms and for isoenzyme patterns. The latter are most probably chromosome markers. With one exception both methods separated the isolates into the same 13 different groups. The largest group was represented 7 times according to isoenzymes and 8 times according to RFLP. This fixed non-random association of plasmid and chromosomal genotypes is consistent with a clonal population structure; it indicates limited exchange of plasmids under natural conditions. Seventeen isolates of 11 groups were highly effective and 2 isolates in one group almost ineffective.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF00011120