黄精种子形态及发芽特性研究

研究了黄精果实及种子不同发育时期内源激素ABA含量的变化与收获种子类型,以及不同类型黄精种子形态、生活力、千粒重与发芽的相关性.结果表明:3种类型黄精种子属不同发育时期的种子,其外观形态和各种物理特性指标都存在一定差异,其中黄皮种子最大,长、宽平均值分别为4.372 mm和3.710 mm,活性较弱,发芽率45.16%;绿皮种子的千粒重、生活力、发芽率均最高,分别为35.6 g、85%和85.71%;黑皮种子基本没有生活力.说明绿皮种子质量最好,黄皮种子次之.

Studies on Seed Morphology and Germinating Characteristics of Polygonatum sibiricum Red.

the change of endogenous hormones ABA content at different developmental stages of fruits and seeds, the types of seed harvested, as well as the relationship between seed germination and seed morphologies, seed liveness, 1 000-grain weight of Polygonatum sibiricum Red. respectively were systematically studied. The results showed that tree types of Polygonatum sibiricum Red.. seeds belong to 3 different stages of develop ment. They were different in both morphology and various physical features. Among 3 types of seed,i. e. yellow coat,green coat and black coat,the yellow one was the biggest with less liveness,and its length and width was respectively 4. 372 mm and 3.710 mm;the green one was the highest in 1 000-grain weight,seed liveness and germinating rate was 35. 6 g,85% and 85. 7% respectively; the black one was no liveness. The reseach showed that the seed of green coat type was the best,and the second was yellow one.