Effect of heavy metals on morpho-anatomical and physiological characteristics of poplar clones (Populus spp.). [Doctoral dissertation] | Uticaj teskih metala na morfo-anatomske i fizioloske karakteristike klonova topola (Populus spp.). Doktorska disertacija
2009
Nikolic, N.
The aim of this thesis was to evaluate the impact of Ni and Cd on morpho-anatomical and physiological characteristics of taxonomically distant poplar clones. Plant growth, dry matter accumulation, photosynthetic pigments concentration, rates of dark respiration and photosynthesis, nitrate reductase activity (NRA), structure of leaves and roots, mineral nutrition, and accumulation of cadmium and nickel in plant organs were studied. Plants were grown hydroponically using Hoagland nutrient solution containing different concentrations of Ni and Cd. Genetic specificity of studied traits was evident, as well as the interclonal variability in treated plants. Phytotoxic effects of the heavy metals were noticed in all poplar clones, and their intensity depended on the metal and concentration applied. Effect on plant height and biomass, photosynthetic characteristics, uptake and distribution of macro- and micronutrients, and structure of leaves and roots varied between poplar clones and the treatments. Chemical analysis of plant organs (leaves, stem, roots) revealed the highest accumulation of Cd and Ni in roots in all poplar clones. On the basis of biomass production as the tolerance indicator of studied clones, it could be concluded that the most tolerant clones to Cd and Ni were B-81 and M-1, respectively, in the range of applied concentrations.
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