不同亚硒酸钠浓度对党参生长、生理特性和品质的影响

o comprehensively understand the effects of selenium (Se) supplementation on Codonopsis pilosula, effects of sodium selenite levels on Se accumulation, growth, physiology and quality were explored by using hydroponic experiments. The results were as follows: (1)Treatment with 0.2 mgL-1 Se promoted leaf size, plant height and biomass of C. pilosula, while treatment with 10 mgL-1 Se suppressed them. (2)Both increasing Se level and exposure time to C. pilosula seedlings could raise its Se content in roots and leaves, and Se was distributed in organs with an order of root>leaf>stem. (3)Treatment with 0.2 mgL-1 Se increased photosynthetic pigment contents and root activity, and reduced malondialdehyde, proline and hydrogen peroxide content, while treatment with 10 mgL-1 Se had opposite effects. (4)Treatment with 0.2 mgL-1 Se had positive effects on accumulations of lobetyolin, polysaccharides, and soluble protein, while treatment with 10 mgL-1 Se had negative effects on the accumulations of polysaccharides and soluble protein. Collectively, sodium selenite had dual effects on C. pilosula; Application of appropriate Se was beneficial to its growth, plant physiology and quality, and 0.2 mgL-1 Se level was the optimum. This work may improve our understanding the effect of selenite level on the biology effect of C. pilosula, which would be useful for the basic research and cultivation of Se-enriched C. pilosula.