几种外源物质对桔梗种子发芽的影响

25℃的恒温黑暗条件下，用不同浓度的GA3,CaCl2，H2O2，PEG溶忮对桔梗种子进行发芽预处理。结果表明与对照处理相比，0．14～0．72mmol·L^-1的GA3均能不同程度地提高桔梗种子的发芽率、发芽指数和发芽势，10～20mmol·L^-1CaCl2、0．25％～0．5％H2O2对桔梗种子的发芽也有一定的促世作用，然而5％～40％PEG处理对桔梗种子的萌发具有抑制作用。证明0．14～0．72mmol·L^-1^-1的GA3和较低浓度的CaCl2、H2O2对桔梗种子的萌发具有促进作用。

Effect of Several Exogenous Matter on Seed Germination of Plalycodon grandiflorum

On the condition of 25 ℃ and darkness, the seeds of plalycodon grandiflorum were pretreatmented by different concentrations of GA3,CaCl2,H2O2,PEG . The results indicated that compared with control, the germination rate, germination index and germination en- ergy of phdycodon grandiflorum seed were increased at a certain degree with the pretreatments of 0.14-0.72 mmol·L^-1 GA3. Pretreatments with 10-20 mmol· L^-1 CaCl2 and 0.25%-0.5% H2O2 improved germination of plalycodon grandiflorum seeds. However, the seed germination was inhibited pretreatmented with 5%-40% PEG. The results suggested that 0.14-0.72 mmol·L^-3 GA3 and lower concentration CaCl2 or H2O2 pretreatment improved the seed germination of plalycodon grandiflorum.