PJB-2019-728
EFFECTS OF DIFFERENT SELENIUM FORMS ON SELENIUM ACCUMULATION, PLANT GROWTH, AND PHYSIOLOGICAL PARAMETERS OF WILD PEACH
Xieping Sun
Abstract
Different forms of selenium (Se) were added to detect the mechanism of Se transportation, distribution in seedling of wild peach (Amygdalus persica L.), and the effects on plant growth and some physiology parameters. 1.0 mg/kg of Se2–, Se0, Se4+ and Se6+ (from selenomethionine, Se powders, sodium selenite, sodium selenate respectively) were added in 4.1L plastic pots planting 15 cm–high wild peach seedlings. After 45 days treatments, seedling growth parameters, Se concentrations in different parts of the plants, and leaf sugar contents were determined. We found that all 4 forms of Se treatments increased shoot length, stem diameter, dry weight, especially Se4+ and Se6+ significantly promoting on plant dry weight. Wild peach showed different Se enrichment ability, via Se bioconcentration factors (BCF) in the order of Se2– > Se6+ > Se4+ > Se0. But it showed the same trend in the four Se forms distribution, as the largest Se content was in roots, followed by in leaves and stems. There was no significantly difference on leaf pigments concentration of the Se forms treatment except Se0. Four forms of Se treatments significantly reduced leaf malondialdehyde (MDA) concentration, and obviously increased reducing power, invisibly increased the content of reducing sugar, and decreased the content of total sugar on different levels. All in all, different Se forms effected wild peach growth and physiological parameters on different level, and wide peach in Se in Se6+ and Se2– forms owed the highest Se compared to other two forms. It may lead to better understanding for the transformation and distribution of different Se forms in wild peach.
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