Effects of PEG Drought Simulation on Seed Germination and Seedling Growth of Platycodon grandiflorum (Jacq.)A.DC
Ding Yingbin
Zhang Haiyan
Abstract：The seeds of Platycodon grandiflorum were treated by PEG at different concentrations of 0, 2%,4%,6%,8%,10%,12% and 14%.The effects of drought stress on seed germination and seedling growth were studied.The results showed that compared with CK,the seed germination and seedling growth un-der 2% and 4% PEG treatments had no obvious changes.The germination rate,germination energy,germina-tion index,vigor index,bug length,root length,fresh weight,dry weight,root shoot ratio under 6% PEG treatment decreased significantly,and the decrease range of all the indexes increased with the increase of PEG concentration.The germination rate in 10% and 14% PEG treatments was 50% and 10% of the control,re-spectively.So the low PEG concentrations (2%,4%)had no significant effects on seed germination and seedling growth.The 6%,10% and 14% PEG concentrations were the beginning,half and maximal inhibito-ry concentration,respectively.The inhibitory degree of PEG to root was higher than that to bud.Therefore, Platycodon grandiflorum had some tolerance to drought and could be planted in mildly drought region.
Keywords：Platycodon grandiflorumPEG drought simulationSeed germinationSeedling growth
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 51-53,57 )