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Information Journal Paper

Title

EVALUATION OF SOME PHYSIOLOGICAL CHARACTERISTICS OF RHIZOBIUM LEGUMINOSARUM BV. VICIAE NATIVE TO SOILS OF IRAN

Writers

KHOSRAVI H.

Pages

 Start Page 513 | End Page 523

Keywords

Abstract

NITROGEN is one of the most important and most frequently used elements for plant growth. The need of plants to NITROGEN supplied through chemical fertilizers that causes many environmental problems. Biological NITROGEN FIXATION is one of the exceptional natural phenomena that accomplished by some of bacteria including Rhizobia. Rhizobium leguminosarumbv. viciae is the specific SYMBIOTIC NITROGEN fixer of faba bean. Plant infection test is one of the inexpensive and reliable methods for detection of Rhizobium. In this research the sampling of Rhizobium root nodules of faba bean in 50% flowering stage in fields of farmers from Khouzestan, Lorestan, Golestan, Mazandaran and Gilan provinces was accomplished. A total, 168Rhizobium root nodules were collected from these areas. After isolation of bacteria from nodules, various morphological and physiological tests were performed on the isolates. Accordingly, 101 isolates were purified and detected. Plant infection test revealed that 42 isolates are able to form root nodules on fababean. The SYMBIOTIC effectiveness of selected isolates was 5-165. The main Conclusion of this research was achieving to some super strains of native Rhizobia in terms of nodulation and SYMBIOTIC effectiveness for future investigations for introducing Rhizobium inoculums for fababean.

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