三七总皂苷及两种单体皂苷对三七幼苗的化感作用研究

摘要

研究了不同质量浓度的三七总皂苷、人参皂苷Rg1和三七皂苷R1对三七幼苗的化感作用.结果表明,三七幼苗的苗高、主根长、可溶性蛋白质含量、可溶性糖含量、CAT活性在不同质量浓度三七总皂苷、人参皂苷Rg1、三七皂苷R1处理后均有所降低.其中,三七总皂苷、人参皂苷Rg1可使幼苗的苗高和主根长显著降低;三七总皂苷质量浓度为0.01,0.10,1.00 mg·L-1时,幼苗的可溶性蛋白质含量分别显著低于对照28.83%, 17.07%,23.21%.三七总皂苷还可降低幼苗的POD和SOD活性,而人参皂苷Rg1、三七皂苷R1处理会增加幼苗的SOD活性.综合表明,皂苷类物质对三七幼苗均有一定的化感抑制作用,三七总皂苷的化感抑制作用强于两种单体皂苷.%The effects of Panax notoginseng saponins(PNS),ginsenosides Rg1and notoginsenoside R1at different concentrations on the growth and physiology of P. notoginseng seedlings were studied in this pa-per. The results showed that shoot height,main root length,soluble protein content,soluble sugar con-tent and CAT activity in treated P. notoginseng seedlings were decreased. The shoot height and main root length of seedlings treated with PNS and ginsenosides Rg1 were decreased obviously; the soluble protein content in the seedlings treated with 0.01,0.10,1.00 mg·L-1ofPNS were dramatically lower than those of 28.83%,17.07% and 23.21% in control groups. The POD and SOD activity of seedlings were also reduced by PNS. However,SOD activity of seedlings treated with ginsenosides Rg1and notog-insenoside R1were increased. It indicated that these three saponins had allelopathic inhibitory effects on P. notoginseng seedlings.The effects of PNS were most significant among thesethree saponins.