摘要
观察山东沂源5株叶籽银杏的成熟种子形态，发现叶生种子形状多样，大小较正常种子小1／2～1／4，背凸腹平；核体内上部1／5～3／5处为“空腔”，棱线不明显；内种皮珠孔端棕色，萎缩、皱褶或不发育；种仁多种形状，较圆滑。测定叶生种予的种质量、核质量分别为3．72、0．79g，出核率、出仁率分别为21．40％、48．50％。
The mature seeds taken from five Ginkgo biloba var. epiphylla trees growing in Yiyuan, Shandong were studied. It was found that seeds of the Ginkgo biloba vat. epiphylla varied in the shape, a half to three quarters in size of the normal seeds, with convex back and flat ventral; there was a cavity at 1/5 -3/5 of the upper part inside the nut, the ridge was not obvious. The micropylar region of endotesta was brown, showing atrophy, fold or non-developed. The kernel was relatively smooth on the surface while various in the shape. The seed weight and nut weight were 3.72 g, 0. 79 g, respectively; the ratios of nut to fruit and kernel to fruit were 21.40%, 48. 5%, individually.
出处
《西南林学院学报》
2010年第2期21-24,共4页
Journal of Southwest Forestry College
基金
国家自然科学基金(30671707
30872040)项目资助
关键词
叶籽银杏
叶生种子
形态描述
Ginkgo biloba var. epiphylla
epiphllus seeds
morphological description
