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Estimation of host-strain compatibility for symbiotic N-fixation between Rhizobium meliloti, several annual species of Medicago and Medicago sativa
Journal article   Peer reviewed

Estimation of host-strain compatibility for symbiotic N-fixation between Rhizobium meliloti, several annual species of Medicago and Medicago sativa

J.G. Howieson, B. Nutt and P. Evans
Plant and Soil, Vol.219(1/2), pp.49-55
2000
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Abstract

Standard methods for estimating host-strain compatibility for N-fixation in vitro proved inadequate for examination of the symbiosis between Rhizobium meliloti and Medicago sativa, M. littoralis, M. tornataas well as for hybrids between M. littoralisand M. truncatula. When screening procedures in soil free of background R. melilotiwere adopted, nitrogen fixation appeared to be unrestricted by the screening environment. During the experiments it became clear that the single commercial inoculant strain available in Australia (CC169) was poorly effective at N-fixation with many of the lucerne and annual medic cultivars examined. Interspecific hybridisation between M. truncatulaand M. littoralis also produced genotypes that were particularly difficult to satisfy in a symbiotic sense. Despite the existence of substantial host-strain genotype interactions between the symbiotic partners, several alternative strains of R. meliloti proved to be broadly effective at N-fixation. One of these, WSM826, has since become commercially available in Australia.

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Collaboration types
Domestic collaboration
Citation topics
3 Agriculture, Environment & Ecology
3.97 Plant Pathology
3.97.892 Rhizobium-Legume Symbiosis
Web Of Science research areas
Agronomy
Plant Sciences
Soil Science
ESI research areas
Agricultural Sciences
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