徐长卿种子生活力检测及发芽生物学特性观察

The germination characteristics of Cynanchum paniculatum seeds

对徐长卿〔Cynanchumpaniculatum(Bge.)Kitag.〕种子生活力与发芽生物学特性进行了观察。结果表明:秋收徐长卿种子贮藏至次年3和4月,生活力分别为87%和80%;种子表面用1%H2O2除菌预处理,有利于正常发芽,发芽率达82%,发芽时间提前1d,第3日出现发芽高峰。温度从15℃至30℃,发芽率逐渐升高;25℃时,种子第2天即开始发芽,出现最短发芽持续时间(5d)和最高发芽势(75%),因此,25℃是徐长卿种子发芽的最适温度。

Germination characteristics of Xuchangqing 〔\%Cynanchum paniculatum \%(Bge.) Kitag.〕 seeds were observed, the vitality of seeds which were harvested last autumn were 87% and 80% in March and April respectively. The sterilization pretreatment with 1% H\-\{2\}O\-\{2\} was propitious to the germination of the seeds, which the germination rate rose to 82.0%, germinating one day ahead and there was a peak of germination vigor on the 3rd day. The germination rate increased gradually from 15℃ to 30℃. Temperature 25℃ was the most suitable temperature for the germination of seeds, in which the seeds germinated at second day, the continued time was 5 d and the germination vigor reached 75%.