Abstract
An experiment was conducted to study the effect of peach seedlings (Prunus davidiana) grown in nutrient solution with different selenium concentration. The results showed that selenium concentration were 0.05 and 0.10 mg/L which caused a marked increase of roots and shoorts biomass, and the root/shoot ratio were relatively low (0.180 and 0.170) compared with control, and other selenium treatments decreased significantly the biomass. Consequently, 0.05 and 0.10 mg/L selenium treatments were conducive to peach seedlings growth, while the peach seedlings was inhibited significantly by the increasing concentration of selenium (≥ 0.10 mg/L). Selenium content of peach seedlings increased remarkably with the increase of selenium concentration that indicated the accumulation of selenium in peach seedlings had a linear relation with the dose of selenium. Above all, when selenium concentration in the range of 0-0.10 mg/ L, which not only promotes peach seedlings growth, but also increases peach seedlings selenium content.
Highlights
Selenium is an essential micronutrient and toxic for many organisms, including plants, animals and humans, with a very narrow window between deficiency and toxicity [1,2]
Hydroponic experiment was conducted to study the effect of peach seedlings (Prunus davidiana) grown in nutrient solution with different selenium concentrations and to choose the suitable concentration for peach
0.05 mg/L selenium treatment had no significant effect on the stems biomass, and other selenium treatments decreased significantly the stems biomass
Summary
Selenium is an essential micronutrient and toxic for many organisms, including plants, animals and humans, with a very narrow window between deficiency and toxicity [1,2]. Selenium deficiency and high concentration selenium inhibit plant growth, and low concentration selenium can promote plant growth [3,4]. Lee et al found that the growth of pakchoi was promoted at lower selenite concentration (selenium ≤ 1.0 mg/L), while it was inhibited at higher selenite concentration (selenium ≥ 2.5 mg /L). In selenite-treated plants, most of the selenite stays in the roots [5], and inhibition of roots growth was higher sensitive. Hui M et al shows that the inhibition effects on root growth were found when selenium concentration was higher than 2 mg/L selenium for broccoli, medic and parsley, and higher than 4 mg/L selenium for wheat, barley and radish [6]. Hydroponic experiment was conducted to study the effect of peach seedlings (Prunus davidiana) grown in nutrient solution with different selenium concentrations and to choose the suitable concentration for peach
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