瑞香狼毒根提取液对植物种子萌发的抑制作用

用水和乙醇对瑞香狼毒根内物质进行了提取,研究了不同浓度提取液处理下2种植物种子的萌发特性和生理指标的变化.结果表明,两种提取液原液及稀释20倍以内均对种子的萌发率和萌发进程产生了明显的抑制作用.原液抑制作用最强,浓度降低,抑制作用减弱.乙醇提取液的抑制作用高于水提取液.在提取液处理下,种子萌发过程中脯氨酸含量提高,可溶性蛋白和可溶性糖含量降低;幼苗中超氧化物歧化酶(SOD)活性提高,丙二醛(MDA)含量增加,表明植物对提取液胁迫可产生一定程度的应激反应.

Inhibition Influence of Extraction Liquids from Stellera Chamaejasme Root on Seed Germination

Substances in Stellera chamaejasme root were extracted by water and ethanol separately, and the influences of the two extraction liquids of different concentrations, i.e., diluted to 0, 10, 20 and 50 times as thin as original extraction liquids, on seed germination and physiological indexes of 2 plants were studied. The results showed that both the original extraction liquids and their 10-20 times dilutions significantly inhibit the seed germination percentage and germinating process. The inhibitability of ethanol-extracted liquid is higher than that of water-extracted one, and the lower the concentration, the weaker the inhibitability. Physiological responses of the 2 plants were induced under extraction liquid treatments. It was found the soluble sugar and protein contents in seeds decrease, while proline content in seeds and malondialdehyde (MDA) content in seedlings increase with weakened superoxide dismutase (SOD) activity.