Journal
PLANT AND SOIL
Volume 288, Issue 1-2, Pages 309-318Publisher
SPRINGER
DOI: 10.1007/s11104-006-9119-y
Keywords
transgenic canola; plant growth-promoting bacteria; nickel-contaminated soil; phytoremediation
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The applicability of transgenic plants and plant growth-promoting bacteria to improve plant biomass accumulation as a phytoremediation strategy at a nickel (Ni)-contaminated field site was examined. Two crops of 4-day old nontransformed and transgenic canola (Brassica napus) seedlings in the presence and absence of Pseudonionas putida strain UW4 (crop #1) or P. putida strain HS-2 (crop #1 and 2) were transplanted at a Ni-contaminated field site in 2005. Overall, transgenic canola had increased growth but decreased shoot Ni concentrations compared to non-transformed canola, resulting in similar total Ni per plant. Under optimal growth conditions (crop #2), the addition of P. putida HS-2 significantly enhanced growth for non-transformed canola. Canola with P. putida HS-2 had trends of higher total Ni per plant than canola without P. putida HS-2, indicating the potential usefulness of this bacterium in phytoremediation strategies. Modifications to the planting methods may be required to increase plant Ni uptake.
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