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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 13, No. 6, 2016, pp. 1581-1590
Bioline Code: st16149
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 13, No. 6, 2016, pp. 1581-1590

 en Chromium uptake by giant reed under rhizobacterial inhibition
Shaheen, S.; Mahmood, Q.; Pervez, A.; Mirza, N.; Bhatti, Z. A.; Hayat, T.; Meryem, S. S. & Ullah, F.

Abstract

The role of rhizospheric microbes of giant reed ( Arundo donax check for this species in other resources L.) in Cr uptake from hydroponic culture was investigated. The control group was exposed to Cr in range of 25–100 mg L-1 containing a control itself (with no metal addition). The experimental group received same Cr treatments, but in addition was exposed to antibiotic treatment in order to inhibit rhizospheric bacteria. The range of Cr accumulated in the roots was 3–7.65 mg L-1; in stem it ranged 2.15–42.4 mg kg-1; while in leaves, the range of Cr content was 13.7–15 mg kg-1. Overall, Cr uptake in A. donax (without rhizobacterial inhibition) was root < leaf < stem. However, the amount of Cr uptake in plants with rhizobacterial inhibition was significantly less (~4.6-folds in 100 mg L-1 Cr treatment) than those without such inhibition clearly highlighting that rhizobacterial inhibition decreased the Cr uptake. The experimental results clearly demonstrated that the inhibition of the rhizobacterial populations had great influence on the Cr uptake. However, Cr uptake could not be completely inhibited as some metal uptake was observed after the rhizobacterial inhibition although it was significantly less than the Cr uptake of plants without such inhibition.

Keywords
Bioremediation; Chromium contamination; Growth; Heavy metals; Metal toxicity; Phytoremediation; Rhizobacteria

 
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