目的探讨黄檗野生种群更新困难的原因,为其种子的萌发机制研究提供参考依据。方法采用甲醇、乙醚、蒸馏水分别浸提黄檗果肉和种子,以白菜、小麦和黄檗作为受试植物,检测种子发芽及幼苗生长情况。结果黄檗果肉和种子的浸提液分别降低了白菜、小麦和黄檗种子的发芽率,对幼苗生长也有不同程度的抑制作用。抑制作用随浓度的增高而增强,以乙醚提取液抑制作用最强,水提液抑制作用不明显。将黄檗种子分离为胚、胚乳和子叶3部分用蒸馏水提取,生物测定发现子叶水提液的抑制活性最强。结论黄檗果肉和种子中均存在着活性较强的抑制物质,能够明显抑制自身及其他植物的生长,抑制物质主要存在于子叶中。

Objective Looking into the causes of self-regeneration obstacle of the wild Phellodendron amurense population in order to provide the reference for the sutdy of the germination mechanism. Methods The germination and seedling growth were observed by taking cabbage, wheat, and P. amurense as the tested objects and the sarcocarp and seed of P. amurense were extracted by alcohol and ethyl ether. Results The extract in sarcocarp and seed of P. amurense could decrease the germination rate of cabbage, wheat, and P. amurense seed, also inhibit the seedling growth in different levels. The inhibitory effect was getting stronger and stronger following the concentration increased. The ethyl ether extract showed the best inhibitory effect, while the water extract had no significant effect. The embryo, emdosperm, and cotyledon of P. amurense were extracted by distilled water, and among them the cotyledon had the strongest inhibition. Conclusion There are some substances with the better inhibitory effect in the sarcocarp and seed of P. amurense, which can inhibit the growth of itself and other plants significantly. The substance with the inhibitory effect exits mainly in cotyledon.

吉林省教育厅项目资助([2007]-399)