加拿大一枝黄花水浸提液对3种植物种子萌发的影响

Effects of the Water Extract from Solidago canadenis L. on Seed Germination of Three Plants

加拿大一枝黄花(Solidago canadenis L.)是一种外来入侵恶性杂草,研究加拿大一枝黄花的化感作用,有助于了解该植物对其他植物的抑制作用,并对农业生产具有重要的指导意义。该研究采用不同浓度的加拿大一枝黄花地上部分的水浸提液,对3种植物[早熟禾(Poa annuaL.)、圆白苋菜(Basella rubraL.)和青王子(Brassia campestrisL)]进行了种子萌发处理实验,分别测定了不同植物种子的萌发速率,终萌发率和种子萌发趋势。结果表明:(1)加拿大一枝黄花地上部分的化感作用是存在的;(2)高浓度的加拿大一枝黄花水浸提液对3种植物种子的萌发特性(终萌发率、发芽速率和发芽动态)均有明显的抑制作用,其中Poa annua和Brassia campestris受到的影响比Basella rubra较为明显。通过加拿大一枝黄花地上部分水浸提液处理3种植物种子的实验,初步揭示了该植物的化学入侵机制。

The allelopathy of the exotic invasive plant Solidago canadenis L. was studied, which study would help understand the inhabition to other plants and be of paramount significance to agriculture. The extract from the organs above ground of Solidago canadenis was used to treat the seeds of three plant seeds, this study determined the seeds germination rate and the final germination. The results were as follows： （1） the allelopathic effects of Solidago canadenis does exist; （2）Higher concentration of the water extract of the host plant could restrain the traits of germination of three plant, including the final percent germination, germination rate and the trend of germination. In three experimented species, the effect of water extract from host plant on Poa annua and Brassia campestris were more significant than Basella rubra. This research using the experiment of seed germination preliminarily proved the chemical mechanism of the host plant.