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Journal of Applied Sciences
  Year: 2013 | Volume: 13 | Issue: 5 | Page No.: 743-748
DOI: 10.3923/jas.2013.743.748
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Cu Accumulation in the Rhizosphere of Lindenbergia philippensis (Cham.) Benth. Growing in the Contaminated Sediment

Thanchanok Kangwankraiphaisan and Kallaya Suntornvongsagul

The association of Lindenbergia philippensis (Cham.) Benth. and Arbuscular Mycorrhizal Fungi (AMF) enhanced plant tolerance to high concentration of Cu by reducing the accumulation of Cu in plant root. The aim of the study was to study Cu accumulation in the zinc smelting sediment that occurred in the rhizosphere sediment and root associated with AMF. The plant was grown in the sediment containing low level of nutrients (0.86±0.03% of Total Organic Carbon (TOC), 1.15±0.40 mg kg-1 dried sediment of nitrate (NO3-N) and 5.67±5.51 mg kg-1 dried sediment of phosphorus (P)) and high concentration of heavy metals under weak basic condition (pH 7.79-8.28). High level of Cu accumulation was detected in the rhizosphere suggesting that the biological function of the plant and AMF may limit the excess Cu from reaching into plant cells. Solid particle sheath containing Cu showed rectangular and amorphous particles was observed around rhizosphere zone by SEM-EDS. Relatively lower Cu concentration was detected in plant root with active AMF (T1) comparing to plant root with suppressed AMF (T2). Interestingly, higher Cu concentration was observed in rhizosphere of plant with active AMF whereas the Cu was lower in rhizosphere of the sample without active AMF. These results indicated that Cu in the rhizosphere is influenced by the function of AMF. The results of this study provide useful insight on Cu accumulation with the presence of association between AMF and dominant plant and may be considered as a valuable tool for phytostabilization.
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How to cite this article:

Thanchanok Kangwankraiphaisan and Kallaya Suntornvongsagul, 2013. Cu Accumulation in the Rhizosphere of Lindenbergia philippensis (Cham.) Benth. Growing in the Contaminated Sediment. Journal of Applied Sciences, 13: 743-748.

DOI: 10.3923/jas.2013.743.748






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