Effect of zinc and cadmium on physiological and production characteristics in Matricaria recutita
2010
Kummerova, M.,Masarykova Univ., Brno (Czech Republic). Ustav Experimentalni Biologie | Zezulka, S.,Masarykova Univ., Brno (Czech Republic). Ustav Experimentalni Biologie | Kralova, K.,Univerzita Komenskeho, Bratislava (Slovak Republic). Chemicky Ustav | Masarovicova, E.,Univerzita Komenskeho, Bratislava (Slovak Republic). Katedra Pedologie
Effects of zinc (12-180 microM) alone and in mixtures with 12 microM Cd on metal accumulation, dry masses of roots and shoots, root respiration rate, variable to maximum fluorescence ratio (FV/FM), and content of photosynthetic pigments were studied in hydroponically cultivated chamomile plants. The content of Zn in roots and shoots increased with the increasing external Zn concentration and its accumulation in the roots was higher than that in the shoots. While at lower Zn concentrations (12 and 60 microM) the presence of 12 microM Cd decreased Zn accumulation in the roots, treatment with 120 and 180 microM Zn together with 12 microM Cd caused enhancement of Zn content in the root. Presence of Zn (12-120 microM) decreased Cd accumulation in roots. On the other hand, Cd content in the shoots of plants treated with Zn + Cd exceeded that in the plants treated only with 12 microM Cd. Only higher Zn concentrations (120 and 180 microM) and Zn + Cd mixtures negatively influenced dry mass, chlorophyll (Chl) and carotenoid content, FV/FM and root respiration rate. Chl b was reduced to a higher extent than Chl a.
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