Abstract
This study was carried out to determine the combined effects of ectomycorrhizal fungus Pisolithus arhizus and different soil types on the accumulation of heavy metals by seedlings of pearl millet. The seedlings were grown on soils with a high and low concentration of heavy metals and a mixture of the two soil types. The soils were inoculated with the mycorrhiza. The plants were grown for six weeks and then harvested and analyzed for concentrations of heavy metals using an Atomic Absorption Spectrophotometer (AAS). The data obtained were used to determine the bioaccumulation factor (BCF) and translocation factor (TF) of the heavy metals. The result showed that millet accumulated manganese (Mn) up to 121.4% compare to its concentration in the soil, which means millet is a hyperaccumulator of Mn. It was also found to be hyperaccumulator of cadmium (Cd) (110%); moderate accumulator iron (Fe) (74.8%), copper (Cu) (20.9%), zinc (Zn) (22.2%) and lead (Pb) (18.8%). However, the inoculation of the experimental soils with the mycorrhiza increased the BCF of some of the heavy metals, while others were decreased. Also, the addition of waste dump soil to the experimental soil (soil amendment) decreased the BCF of some of the heavy metals, while others were increased. These results suggest that pearl millet can be used for phytoremediation of some heavy metals from contaminated soils. Also, the addition of waste dump soil and ectomycorrhiza Pisolithus arhizus to soil can be used to increase or decrease phytoremediation/amelioration potentials of pearl millet, which depend on the particular heavy metal involved.
Toma Buba, Mohammad Abdullahi Jalam, Musa Ibrahim Abubakar. (2021) Bioaccumulation and translocation of heavy metals in pearl millet (pennisetum glaucum) depends on ectomycorrhiza pisolithus arhizus and soil type, The Journal Soil & Environment , Volume 40, Issue 1.
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