冷热预处理对野生蒲公英种子发芽特性的影响研究

Studies on effect of cool and warm temperature pretreatment on germination characteristics of wild Chinese dandelion (Taraxacum mongolicum)seeds

不同的温度处理对蒲公英种子进行发芽特性的研究表明 ,35℃热处理 8h ,或 5℃冷处理 4d后的发芽率比 2 5℃恒温发芽率有明显提高。种子在萌发过程中对高低温有一定的耐受能力。种子经过热处理 16h或预冷8d ,种子活力指数和发芽指数均高于 2 5℃对照。

Different temperature pretreatments on seeds indicated that 8 h high temperature and 4 d low temperature prior to seed germination could increase germination rate obviously. Chinese dandelion seed has certain tolerant ability to high or low germination temperature. Seeds with 16h high temperature, or 8d low temperature pretreatment got higher vigor index germination index than that of control.