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Title: Effect of Corn Plant on Survival and Phenanthrene Degradation Capacity of Pseudomonas Sp. UG14Lr in Two Soils
Authors: Waraporn Chouychai
Amporn Thongkukiatkul
Suchart Upatham
Prayad Pokethitiyook
Maleeya Kruatrachue
Hung Lee
Burapha University
Mahidol University
University of Guelph
Keywords: Agricultural and Biological Sciences;Environmental Science
Issue Date: 1-Jul-2012
Citation: International Journal of Phytoremediation. Vol.14, No.6 (2012), 585-595
Abstract: A study was undertaken to assess if corn (Zea mays L.) can enhance phenanthrene degradation in two soils inoculated with Pseudomonas sp. UG14Lr. Corn increased the number of UG14Lr cells in both soils, especially in the acidic soil. Phenanthrene was degraded to a greater extent in UG14Lr-inoculated or corn-planted soils than uninoculated and unplanted soils. The spiked phenanthrene was completely removed within 70 days in all the treatments in slightly alkaline soil. However, in acidic soil, complete phenanthrene removal was found only in the corn-planted treatments. The shoot and root lengths of corn grown in UG14Lr-inoculated soils were not different from those in non-inoculated soil between the treatments. The results showed that in unplanted soil, low pH adversely affected the survival and phenanthrene degradation ability of UG14Lr. Planting of corn significantly enhanced the survival of UG14Lr cells in both the bulk and rhizospheric soil, and this in turn significantly improved phenanthrene degradation in acidic soil. Re-inoculation of UG14Lr in the acidic soil increased the number of UG14Lr cells and enhanced phenanthrene degradation in unplanted soil. However, in corn-planted acidic soils, re-inoculation of UG14Lr did not further enhance the already active phenanthrene degradation occurring in both the bulk or rhizospheric soils. © 2012 Taylor and Francis Group, LLC.
ISSN: 15497879
Appears in Collections:Scopus 2011-2015

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