凤丹牡丹种子浸提液对白菜种子萌发和幼苗生长的影响

Effects of Paeonia ostii ‘Fengdan'seed extracts on seed germination and seedling growth of cabbage

通过研究凤丹牡丹种皮透水性及种子各部分的水浸提液、甲醇浸提液对白菜种子萌发的影响,分析凤丹牡丹种皮透水性和浸提液的生物效应。结果表明,凤丹牡丹完整种皮种子与刺破种皮种子的吸水率和吸水量有明显差异,说明凤丹种皮吸水困难;凤丹牡丹的种皮、胚乳和种胚均含有抑制白菜种子发芽的物质,抑制效果随着浸提液浓度的增加而显著增强;同一部位相同浓度条件下,甲醇浸提液对白菜种子发芽和幼苗生长的抑制作用均显著高于水浸提液;不同浸提液在相同浓度条件下对胚乳的抑制作用显著大于种皮和种胚。

The seed coat permeability of Paeonia ostia‘Fengdan’was studied,and the effect of water and methanol extracts of various parts of the seed on seed germination of cabbage was investigated. The results showed that there was significant difference in water absorption rate and capacity of Paeonia ostii‘Fengdan’between the treatments of complete and pricked seed coat,indicating the obstacle in water absorption of Paeonia ostii ‘Fengdan’seed coats.The seed coat,endosperm and embryo of Paeonia ostii ‘Fengdan’all showed inhibitory effects on seed germination of cabbage,and the inhibitory effects increased with the increase of the extracts concentration. Under the same concentration of extracts from the same part,the inhibitory effect of methanol extracts on cabbage seed germination and seedling growth were significantly higher than water extracts. The extracts of endosperm showed higher inhibitory effect than seed coat and embryo in the same concentration.