The effect of different compounds of selenium and iodine on selected biochemical and physiological characteristics in common buckwheat and pumpkin sprouts

Abstract

There is little data about possible interactions between selenium and iodine on plants. Se is essential for I metabolism in the thyroid in mammals. Thus, it is of great importance to carry out the research with simultaneous application of both elements in plant cultivation that are used for human consumption. Seeds of common buckwheat and pumpkins were soaked in solutions: 10 mgSe/L in the form of selenite or selenate, and 1000 mgI/L in the form of iodide or iodate and their combinations. The content of chlorophyll a and b, and carotenoids were measured. Further, the measurements of fluorescence of chlorophyll a were performed. Controlbuckwheat sprouts and sprouts from seeds soaked in Se(VI) and Se(VI)+I(-1), had the lowest and similar amount of chlorophyll a and carotenoids. There was little effect of different treatments on potential photochemical efficiency of photosystem II (PS II)in common buckwheat sprouts. In pumpkin sprouts neither of treatment affected the amount of photosynthetic pigments, as well as potential photochemical efficiency of (PS II) which was around 0.8.Zelo malo podatkov obstaja o interakciji med selenom in jodom pri rastlinah. Selen je bistvenega pomena za delovanje ščitnice. Zato je pomembno, da preučujemo hkraten vpliv obeh elementov na rastline, ki jih uporabljamo za hrano ljudi. Seme navadne ajde in buč smo namakali v različnih raztopinah Se in I; selenata in selenita ter jodida oz. jodata ter vseh njunih kombinacij. Merili smo sledečefiziološke in biokemijske lastnosti kontrolnih in obravnavanih rastlin: fotokemično učinkovitost fotosistema II (FS II) ter vsebnost fotosinteznih barvil (klorofil a, klorofil b in karotenoidi). Kontrolne kalice ajde in kalice, zrastle iz semen, namakanih s Se(VI) in se(VI)+(I-1), so imele najnižjo in podobno vsebnost klorofila a in karotenoidov. Obravnavanja so malo vplivala na potencialno fotokemično učinkovitost fotosistema II pri kalicah navadne ajde (kalice iz semen, namakanih v Se(IV)+I(-1), so imele najnižjo potencialno fotokemično učinkovitost fotosistema II). Nobeno obravnavanje ni vplivalo na vsebnost fotosinteznih barvil in potencialno fotokemično učinkovitost fotosistema II pri kalicah buč. Potencialna fotokemična učinkovitost fotosistema II pri kalicah buč je bila okoli 0,8.