Impact of long term application of treated tannery effluents on the emergence of resistance traits in Rhizobium sp. isolated from Trifolium alexandrinum

A total of 35 Rhizobium sp. were isolated from the root nodules of Trifolium alexandrinum (Egyptian clover) irrigated with treated tannery effluents and characterised on the basis of morphological, cultural and biochemical characteristics. Rhizospheric soils and plant parts were also analysed for metal concentrations by atomic absorption spectrophotometry.