ISSN:
1573-5036
Keywords:
Astragalus sinicus
;
Bradyrhizobium
;
intrinsic antibiotic resistance
;
plasmid
;
rhizobium serology
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Eleven isolates ofBradyrhizobium sp. (Astragalus sinicus L.), originating from plants ofAstragalus sinicus (Chinese milkvetch) in China and Japan, were characterized using serological agglutination, intrinsic antibiotic resistance, and plasmid visualization. Serological agglutination, using antisera against three isolates effective onA. sinicus and two isolates effective on otherAstragalus spp., showed that there may be two serogroups among the eleven isolates effective onA. sinicus, and that the antigenic components are heterogeneous. Results of both intrinsic antibiotic resistance and plasmid visualization demonstrated similarities between four of the isolates. Ten isolates were further evaluated for effectiveness on the host,A. sinicus, in a field study in Puyallup, Washington (47°N, 122°W). This study showed that the Chinese commercial inoculum and one field isolate were about ten times more effective than the control based on plant dry weight and seed yield. Eight other isolates were less effective.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02197584
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