Phytoremediation of heavy metals using poplars | Topole u fitoremedijaciji teških metala
2010
Nikolić, N.
The monograph discusses the results of investigation aimed at the possibility of utilization of poplars in removing Cd and Ni from the environment, based upon their genetic potential and number of hybrids that have been developed so far. Because of their rapid growth rates, high biomass production and high transpiration rates, poplars are ideal candidates for the investigation of the process of phytoremediation. The tolerance of different poplar clones to heavy metal contamination was evaluated through their growth characteristics, accumulation of dry matter, concentration of photosynthetic pigments, photosynthesis and transpiration rates, activity of nitrate reductase, morphology of leaves and root, ability to uptake mineral elements in the presence of heavy metals and accumulation of Cd and Ni into their organs. The obtained results indicate that the genetic specificity of the investigated parameters and a remarkable interclonal variability was found when heavy metals were present. Furthermore, the toxic effect of heavy metals was evident in all the studied poplar clones while its intensity relied upon a metal itself and its concentration. The highest Cd and Ni were accumulated in poplar root. Taking the biomass production as an indicator of tolerance to these two heavy metals will show that the least susceptible to Ni was clone M-1 and that the highly tolerant to Cd was clone B-81. These two clones have the ability to remove the individual metals, lowering the contamination of soil and therefore contributing to the protection of the environment. The monograph is designed to address the results of the expanded research program on the interaction between soil, metals and plants. Unlike some other compounds, metals cannot be degraded, and cleanup requires their removal from the environment.
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