Mitigation approach of arsenic toxicity in chickpea grown in arsenic amended soil with arsenic tolerant plant growth promoting Acinetobacter sp.

摘要

The study was undertaken with the aim of testing the effects of isolated bacterial strain nbri05 from arsenic contaminated site of West Bengal. Firstly, isolated strain was characterized by morphological, biochem-ical and functional characterization and was able to grow at higher concentration of arsenic ranging up to 50,000mgl~(-1) of As(V) (arsenate) and 1500mg l~(-1) of As(III) (arsenite) concentration. After complete characterization, pot experiment was conducted to scrutinize the role of isolated bacterium nbri05 on arsenic uptake, plant growth, biomass and some biochemical responses of chickpea {Cicer aritenum) were grown in arsenic treated soil amended with 10 mg kg~(-1) of sodium arsenate. It was observed that nbri05 combat the As toxicity in plants by reducing the As uptake in shoot part and significantly increases plant growth and yield of the chickpea plant in comparison to only arsenic treated plant. Thus, these results clearly show that the bacterium nbri05 owing to its intrinsic abilities of plant growth promotion and accumulates more As in root of the plant may be accounted as a new bacterium for phytostabilization in chickpea.