World Journal of
Pharmaceutical and Life Sciences

A COMPARISON OF NUTRIENT MOBILIZATION ACTIVITY OF RHIZOSPHERE MICROFLORA OF A LEGUMINOUS PLANT WITH THE RHIZOFLORA OF A NON-LEGUMINOUS PLANT AND NON-RHIZOSPHERIC SOIL

Aneesa Abdul Jabbar and Ayona Jayadev*

ABSTRACT

The aim of the present study was to investigate and to compare the Nitrogen and Phosphorous mobilization activity by the microflora of rhizosphere of a leguminous plant with a non-leguminous plant and uncultivated soil. Sixty days old seedling of Vigna radiata and Capsicum frutescens was selected for this study. It was found that leguminous rhizospheric soil harbors high number of organisms (66 x10-5 CFU/g) than in non-leguminous rhizospheric soil (44 x 10-4 CFU/g) and non-rhizospheric soil sample (28x10-5 CFU/g). The activities studied also showed a similar trend. A total of ten bacterial colonies were isolated from leguminous, where nine colonies showed ammonification, six showed nitrite production and seven showed nitrate production. Among the seven colonies isolated from non-leguminous, two colonies showed ammonification activity, nitrate production and one colony showed nitrite production. Six colonies were isolated from soil and only one isolate showed ammonification. From leguminous rhizosphere two isolates (L8 and L10), showed all the activities analyzed. L8 showed more effective phosphate solubilization with a zone diameter of 4.5 cm, Solubilization Index of 3.25 and an efficiency of 2.25%. The study reestablishes the importance of rhizosphere microflora and the capacity to be used as good biofertilizer agents after proper optimization.

[Full Text Article]   [Download Certificate]