ORIGINAL RESEARCH
The Impact of Short-Term Exposure to Pb and Cd on Flavonoid Composition and Seedling Growth of Common Buckwheat Cultivars
Marcin Horbowicz1, Henryk Dębski1, Wiesław Wiczkowski3, Dorota Szawara-Nowak3, Danuta Koczkodaj1, Joanna Mitrus1, Hubert Sytykiewicz2
 
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1Department of Plant Physiology and Genetics,
Siedlce University of Natural Sciences and Humanities, Prusa 12, 08-110 Siedlce, Poland
2Department of Biochemistry and Molecular Biology,
Siedlce University of Natural Sciences and Humanities, Prusa 12, 08-110 Siedlce, Poland
3Institute of Animal Reproduction and Food Research of Polish Academy of Sciences,
Department of Chemistry and Biodynamics of Food, Tuwima 10, 10-747 Olsztyn, Poland
 
Pol. J. Environ. Stud. 2013;22(6):1723–1730
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ABSTRACT
The aim of this study was to compare the tolerance of seedlings of three Polish buckwheat cultivars (Hruszowska, Kora, and Luba) for short-term exposure to Pb2+ and Cd2+. Seedlings were grown under controlled conditions in Hoagland nutrient solution, with the addition of low/high Pb2+ or Cd2+ ions (0.01 and 1.00 mM, respectively). After 3 days of treated seedling growth, the levels of total anthocyanins and content of particular flavonoids were measured. The presence of low concentrations of both Pb2+ and Cd2+ resulted in a small stimulation of the growth of seedlings of all studied cultivars, while higher doses inhibit root growth and, to a much lesser extent, that of shoots. Cadmium (Cd2+) ions were more harmful for growth of buckwheat seedlings than Pb2+ ions. More resistant to stress caused by the presence of high concentrations of Pb2+ and Cd2+ in the growth medium were seedlings of Hruszowska and Luba cultivars, compared to Kora seedlings. Cotyledons of more resistant cultivars (Hruszowska and Luba) contained much more flavonoids than cotyledons of Kora.
eISSN:2083-5906
ISSN:1230-1485