美丽微孢藻种植水对水华鱼腥藻的化感抑制作用研究

为探讨美丽微孢藻对水华藻类的化感作用,研究了美丽微孢藻种植水对水华鱼腥藻的光密度、叶绿素a和细胞活性的影响。结果表明:浓度为25%的美丽微孢藻种植水在0~2 d时可显著抑制水华鱼腥藻生长,但在2d后无法对其产生显著抑制;浓度为50%的美丽微孢藻种植水在整个实验周期内均可显著抑制水华鱼腥藻生长;浓度为25%的美丽微孢藻种植水在短期内会使大部分藻细胞处于死亡或低活性状态,但在7 d时有31.40%的藻细胞恢复了高活性状态,其化感控藻作用有限;浓度为50%的美丽微孢藻种植水在整个实验周期内均使大部分藻细胞均处于死亡或低活性状态,具有较强的化感抑制作用。

Study of Allelopathic Inhibition of Anabaena Flos-aquae by Microspora Amoena Culture Water

To discuss allelopathic inhibition of Anabaena Flos-aquae by Microspora Amoena culture water,in the paper,the influences of Microspora Amoena culture water on optical density,Chlorophyll A and cell activity of Anabaena Flos-aquae were studied.The results showed that culture water with the concentration of 25％ Microspora Amoena could significantly inhibit the growth of Anabaena Flos-aquae in the first two days,but from the third day,the inhibition was not as significant as in the previous two days.Culture water with the concentration of 50％ Microspora Amoena could significantly inhihit the growth of Anabaena Flosaquae within the whole experimental period.Culture water with the concentration of 25％ Microspora Amoena could lead most algal cells into a death or low activity state in a short period,but the high activity of 31.40％ of the algal cells would be recovered in the seventh day.Therefore,allelopathic inhibition of the algal by the culture water with the concentration of 25％ Microspora Amoena was limited.Culture water with the concentration of 50％ Microspora Amoena could lead most algal cells into a death or low activity state during the whole experimental period,with stronger allelopathic inhibition.