Effect of Selenium on Magnesium, Iron, Manganese, Copper, and Zinc Accumulation in Corn Treated by Indole-3-acetic Acid
2008
Pazurkiewicz-Kocot, Krystyna | Kita, Andrzej | Pietruszka, Mariusz
In this work, the relationship among accumulation of selenium, auxin, and some nutrient elements [magnesium (Mg2+), iron (Fe3+), manganese (Mn2+), copper (Cu2+), zinc (Zn2+)] in tissues of roots, mesocotyls, and leaves of Zea mays L. plants was studied. Seeds of maize were cultivated for 4 days in the darkness at 27 °C on moist filter paper, then the individual seedlings were transferred into an aerated solution containing the macro- and microelements and were cultivated in a greenhouse for 12 h in the light and 12 h (12-h photoperiod) in the dark at 25 °C. The seedlings were exposed to the solution containing sodium hydrogen selenite (NaHSeO3), indole-3 acetic acid (IAA), or IAA+NaHSeO3 for approximately 96 h before chemical analysis. The concentration of IAA in the external medium was 10-4 mol dm-3, concentration of selenite (NaHSeO3) was 10-6 mol dm-3, and the pH of the medium was 6.5. The accumulation of the probed elements in seedlings of maize was measured by inductively coupled plasma optical emission spectroscopy (ICP-OES). It was determined that the selenite and IAA, present in the external medium of growing plants, changed the uptake and accumulation of some cations in tissues of leaves, mesocotyls, and roots. The change of transport conditions of these nutrient elements is probably one of the first observed symptoms of selenium effects on plants.
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