天人菊种子萌发条件的研究

Research of Gaillardia aristata Seed Germination under Different Conditions Growth Condition of Young Walnut Tree

通过5组不同温度处理和赤霉素(GA3)、聚乙二醇(PEG)、细胞分裂素(6-BA)、磷酸二氢钾(KH_2PO_4)处理,研究不同条件对天人菊种子萌发特性的影响。结果表明:在变温25/15℃处理下,种子发芽率、发芽势、发芽指数最高,分别为83.67%、72.83%、6.88。由此可得:变温25/15℃是天人菊种子萌发的最适温度。在25℃恒温处理下,分别施用不同的激素,得到天人菊种子最适发芽浓度分别为300mg/L赤霉素(GA3)、10%PEG、100mg/L细胞分裂素(6-BA),但KH_2PO_4对天人菊种子萌发的影响并不显著。由试验可得:100mg/L的细胞分裂素(6-BA)对天人菊种子的萌发有更好的促进作用。

Through the experiment of 5 groups temperature processing,gibberellic acid （GA3）, polyethylene glycol （PEG）,cytokinins （6-BA）and potassium dihydrogen phosphate （KH2PO4）four kinds of hormone treatment experiments,study the germination characteristics of Gaillardia aristata seeds under different treatment. Under variable temperature 25/15 ℃ processing,seeds have the highest germination rate,germination potential,germination index, 83.67%,72.83% and 6.88 respectively, therefore,variable temperature 25/15 ℃ is the optimum temperature of Gaillardia aristata seed germination. Under 25℃constant temperature processing,through the use of different hor- mones,the optimum germination concentrations are 300mg/L gibberellic acid（GA3）, 10% polyethylene glycol（PEG） and 100mg/L cytokinins （6-BA）,but the influence of KH2PO4 on the germination is not significant. Through the experiment, the cytokinins（6-BA）of 1