An experiment was
conducted to assess the influence of arbuscular mycorrhizal (AM) fungi on the
performance of Phaseolus vulgaris under crude oil contaminated soil. P.
vulgaris was grown on soil under 2%, 4% and 8% (v/w) crude oil
contamination. The experimental units were biostimulated with 2 g NPK
fertilizer pot-1 and were inoculated with 12 g AM inoculum pot-1.
Non inoculated pots served as control. The results showed that AM inoculated
pots recorded higher and significantly (P < 0.05) different dry matter yields and chlorophyll content than non AM
inoculated pots. Residual total petroleum hydrocarbon (TPH) increased as
percent crude oil contamination increased. Total petroleum hydrocarbon
decomposition and removal was higher on pots inoculated with AM than non
inoculated pots. With AM colonization, physiological characteristics of P. vulgaris and TPH decomposition
improved. This is evinced by the linear regression analysis between
colonization and TPH (R2 = 0.77).