Effect of gamma irradiated seeds of Phaseolus vulgaris on the genosymbiotic efficiency of Rhizobium leguminosarum biovar phaseoli affecting vegetative and some chemical traits in Phaseolus vulgairs [electronic resource].

Includes reference.

Seeds from two varieties of common bean (Phaseolus vulgaris) were irradiated with four doses of gamma rays to induce mutations affecting Rhizobium symbiosis, as the development of N,-fixing nodules requires a coordinated expression of genes of both symbiotic partners. Symbiotic response to irradiation affecting leguminous host was measured in two generations using wild type strain of rhizobia. Both doses of 20 and 40 Krad revealed higher symbiotic efficiency in M, and M, populations, respectiveiy. Inoculation with rhizobia was shown to decrease the deleterious effect of radiation below that of uninoculated ones. Gamma Irradiation disrupted the normal ontogeny leading to reduction the development of new tissues in some vegetative traits. leaf area was markedly reduced by gamma irradiation, and was suitable for radiosensitivity assay depending on the growth of genotypes.

Summary in Arabic.

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