COMBINED INFLUENCE OF LEAD AND SELENIUM
ON GERMINATION AND GROWTH OF SUNFLOWER
N.Vorobets, I. Mykiyevych
Ivan Franko National University of Lviv, Hrushevskyi st.4,UA-79005 Lviv, Ukraine
e-mail: biofr@franko.lviv.ua
In sunflower plants (Helianthus annuus L.) cv.Svithoch grown in hydroponics with different concentration Pb(CH3COO)2 single and combined with Na2SeO3 supply, effect on seed imbibition and germination, growth capacity of roots and shoots were analyzed. Selenium prevents toxic effect of lead on sunflower seed germination and its growth.
It is shown that lead acetate in 10-5-10-3 M concentration delayed germination and lowered the ability of sunflower seeds to germinate. 10-3 M Pb solution exerted a clear toxic effect on root and shoot elongation and together with Na2SeO3. Sodium selenite partially raised toxic influence of low Pb concentration and stimulated growth of seedlings.
Key words: lead, selenium, sunflower, growth, imbibition.
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