Reclaiming Cadmium-Contaminated Soil with Poplars and Willows
Wang, R., Dai, S., Tang, S., Tian, S., Song, Z., Deng, X., Ding, Y., Zou, X., Zhao, Y. and Smith, D.L. 2012. Growth, gas exchange, root morphology and cadmium uptake responses of poplars and willows grown on cadmium-contaminated soil to elevated CO2. Environmental Earth Sciences 67: 1-13.
Results indicated that "elevated CO2 increased leaf, root, stem and total biomasses of the three tested tree genotypes, and biomass increase was closely correlated with stimulation of leaf photosynthesis and root growth." In addition, they state that "elevated CO2 increased root lengths, root surface areas, root volumes and numbers of root tips for the three tree genotypes grown on Cd-contaminated soil, and, consequently, enhanced the ability to capture Cd in root systems and led to increased total Cd uptake in all plant parts." In light of these findings, as the air's CO2 content continues to rise, the employment of phytoremediation of contaminated soil should become ever more effective.
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