ISOLATION, SCREENING OF SYMBIOTIC NITROGEN FIXING RHIZOBIUM BACTERIA FROM DIFFERENT RHIZOSPHERE SOILS OF LEGUMES

*Ramakrishna D.

ABSTRACT

Soil contains many types of microorganisms such as bacteria, actinomycetes, fungi, and algae, which are important because they affect the physical, chemical, and biological properties of soil. Amongst the soil bacteria a unique group called Rhizobia has a beneficial effect on the growth of plants. It can live either in the soil or within the root nodules of host legumes. Totally i isolated 30 strains of Rhizosphere soil microorganisms and further characterized by using different methods to screen to the Biological nitrogen fixing microbes and using different legume plants soils. Main aim of this study is to use as biofertilizers are defined as preparations containing living cells or latent cells of efficient strains of microorganisms that help crop plants' uptake of nutrients by their interactions in the rhizosphere when applied through seed or to soil. They accelerate certain microbial processes in the soil which augment the extent of availability of nutrients in a form easily assimilated by plants.

Keywords: Rhizobium bacteria, Symbiotic Nitrogen fixation, Rhizosphere, legume plants, etc.