Effect of Arbuscular Mycorrhizal (AM) Fungi on the Physiological Performance of Phaseolus vulgaris Grown under Crude Oil Contaminated Soil

Chris O. Nwoko

Department of Environmental Technology, Federal University of Technology, Owerri, Imo State, Nigeria.

DOI: 10.4236/gep.2014.24002                

Abstract

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).

Keywords

Arbuscular Mycorrhizae, Crude Oil Decomposition, Phytoremediation

Conflicts of Interest

The authors declare no conflicts of interest.

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