Effects of Foliar Spray of Selenite on Metabolome in Leaves of Torreya grandis Seedlings
[Objective]To investigate the effects of foliar spray of selenite on metabolome in the leaves of Torrey grandis seedlings and changes in levels of secondary metabolites in the leaves.[Method]Sodium selenite of 100 μg·L-1 was sprayed to the leaves of 2-year-old seedlings of T.grandis at an interval of 15 days.15 days after the second spraying,one-year-old leaves were harvested for metabolome analysis.[Result]The results showed that there were 909 differential metabolites between treatment group and control under positive ionization mode,with 69 metabolites of significant changes(27 metabolites up-regu-lated and 42 metabolites down-regulated).Under negative ionization mode,433 differential metabolite oc-curred between treatment group and control,with 43 differential metabolites of significant changes(11 metabolites up-regulated and 32 metabolites down-regulated).Some metabolites beneficial to human health increased significantly in the treated leaves of T.grandis seedlings,such as plantagoside(increas-ing 2.827 times as control),ligustilide(increasing 2.524 times),6-sialyllactose(increasing 2.021 times),and azilsartan(increasing 1.931 times).[Conclusion]The results indicate that selenite foliar application on the leaves of T.grandis can increase biosynthesis of beneficial metabolites and accumulation in their leaves.
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