Heavy Metal Degradation Plant Growth Promoting Rhizobacteria (PGPR): Assess their Bioremediation Potential and Growth Influence of Vigna mungo L. Growing on Cadmium Contaminated Agriculture Soil

Abstract

Heavy metal contamination in agriculture soil devotes serious of crosscutting issue
worldwide. Numerous microbial strains have been frequently used to deduce the heavy metal
contaminated in the agriculture soil. Herein, the present investigation demonstrates that the effects of
inoculate of beneficial microbes on plant growth and heavy metals reducing ability as known
bioremediation in contaminated soil. Therefore, two bacterial strains such as Bacillus subtilis and
Pseudomonas fluorescens are isolated from rhizosphere soil and inoculate on Vigna mungo L. grown
in cadmium (Cd) contaminated soils. Before the inoculation, the bacterial strains are conformed by
biochemical test and molecular identification tools. Afterwards, the plant inoculated with isolates
describes as experimental plant compared with non-inoculated control plants. The obtained results
show the appreciable plant growth with decreased level of heavy metal concentration available at
experiential group of plant growing on the cadmium (Cd) contaminated soils, while compared to
control group. Moreover, inoculation of V.mungo L, particularly, P. fluorescens and B. subtilis
appears to be an effective ways for enhancing the short term rhizoremediation potential of plant
growth and lowering losses in the plant biomass and degreasing above ground tissue contamination.
The results of the study indicate that metal mobilizing (Plant Growth Promoting Rhizabacteria)
PGPR’s could be used as an effective inoculant for improving the bioremediation in heavy metal
polluted soil, as well as for the reclamation of heavy metal contaminated soil, which also favourable
to growing economically important agriculture plants.