NO供体SNP对黄芪种子萌发和幼苗生长的影响

Effects of Exogenous Nitric Oxide Donor SNP on Seed Germination and Seedling Growth of Astragalus membranaceus

为探讨有效提高黄芪种子发芽率的化学控制方法,采用0、0.05、0.25、0.50、0.75、1.00 mmol/L共6个浓度的SNP溶液处理黄芪种子,研究不同浓度SNP溶液浸种对黄芪种子萌发和幼苗生长的影响。结果表明:低浓度SNP处理(0.05、0.25、0.50 mmol/L)能明显促进黄芪种子萌发,提高种子的发芽率和发芽指数,并促进幼苗胚根伸长;较高浓度SNP处理(0.75 mmol/L)对黄芪种子萌发的促进作用不明显;过高浓度SNP处理(1.00 mmol/L)则抑制黄芪种子萌发和幼苗生长。其中,用0.50 mmol/L的SNP溶液浸种对种子萌发效果最好。

The effects of different concentrations of SNP on the seed germination and seedling growth of Astragalus membranaceus were studied. The results showed that 0.05 mmol/L, 0.25 mmol/L and 0.50 mmol/L SNP could promote the seed germination obviously, increase the germination rate and germination index, and promote the embryonic root growth. The promotion effect of 0.75 mmol/L SNP was not obvious. 1.00 mmol/L SNP could inhibit the seed germination and seedling growth. The effect of soaking in 0.5 mmol/L SNP on the seed germination was the best.