山楂黑红和敞口两品种生长、结果以及叶片、枝条、果实特征等均难以区分。为进一步验证两品种是否同属一品种,我们自1987-1988年在泰安黄山头和泰安旧县两地采集花粉,花瓣、花托、花药、叶片、果实等,进行各营养成分及同工酶测定。同时用电镜观察花粉外壁纹饰结构。结果。(1)花 Hawthorn black and red two species of growth, the results and the leaves, branches, fruit characteristics are difficult to distinguish. To further verify whether the two varieties belong to the same species, we collected pollen, petals, flowers, anthers, leaves and fruits from Huangshan, Taian and Tai’an old counties from 1987 to 1988 for the determination of nutrients and isoenzymes. At the same time, the structure of pollen outer wall ornamentation was observed by electron microscope. result. (1) flowers