Symbiotic Promiscuity among Rhizobia Isolated from Tree Legumes
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Authors
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S. Badhwar
Deptt. of Microbiology, CCS Haryana Agricultural University
Hisar-125004 (Haryana)
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R.C. Dogra
Deptt. of Microbiology, CCS Haryana Agricultural University
Hisar-125004 (Haryana)
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P.K. Sharma
Deptt. of Microbiology, CCS Haryana Agricultural University
Hisar-125004 (Haryana)
Keywords:
Acacia, Albizia, Rhizobium, host range, ProsopisAbstract
Twenty nine strains of Rhizobium were isolated from Acacia, Prosopis and Albizia species. Two efficient strains each of Rhizobium nodulating Acacia (AC-2 and AC-11), Prosopis (P-6 and P-7) and Albizia (Alb-4 and Alb-9) were tested for their host range for nodulation and nitrogen fixing ability on different species of Acacia, Prosopis and Albizia Rhizobium sp.(Acacia) strains AC-2 and AC-11were able to nodulate, A. nilotica, A. tortilis, A. auriculiformis, A. farnisiana, A. arabica, A. molisma and A. senegal. Rhizobium sp. (Prosopis) strains P-6 and P-7 nodulated P juliflora and P Specigara while Rhizobium sp (Albizia) strains Alb-4 and Alb-9 nodulated. A. lebbek, A molucene, A. richardiana and A. procera. Rhizobium strains isolated from Acacia, Prosopis and Albizia had wide host range and were able to nodulate heterologous hosts. Variation in effectiveness with homologous and heterologous host nodulated by different rhizobia were also observed.
