铜绿微囊藻(Microcystis aeruginosa)对惠氏微囊藻(Microcystis wesenbergii)的化感作用

通过混合培养和添加过滤液两种方式观察铜绿微囊藻和惠氏微囊藻的生长曲线,探讨两种微囊藻之间的化感作用。结果表明:在混合培养条件下,两者能够形成相互抑制作用;当两者起始藻密度高于0.5×106cells.mL-1、混合比为1:1时,惠氏微囊藻的生长因化感作用而受到显著抑制(P<0.05),同时惠氏微囊藻也会对铜绿微囊藻产生一定的胁迫作用;处于对数生长期的铜绿微囊藻过滤液能抑制惠氏微囊藻的生长,且惠氏微囊藻起始藻密度低于0.5×106cells.mL-1,连续滴加该过滤液后,其生长受到极显著抑制(P<0.01)。

Allelopathic effect of Microcystis aeruginosa on Microcystis wesenbergii

By the methods of co-culture and cell-free filtrate addition,this paper studied the growth curves of Microcystis aeruginosa and Microcystis wesenbergii,and approached the allelopathy between them.The co-culture test revealed that there existed mutual inhibition effect between M.aeruginosa and M.wesenbergii.When the initial cell density of the two algae was higher than 0.5×106 cells·mL-1 and their mixed ratio was 1:1,the growth of M.wesenbergii was suppressed significantly(P<0.05) due to the allelopathic effect of M.aeruginosa,and the growth of M.aeruginosa was slightly inhibited by M.wesenbergii.The cell-free filtrate of M.aeruginosa in its exponential phase inhibited the growth of M.wesenbergii,and,when the filtrate was added continuously into culture solution and the initial cell density of M.wesenbergii was less than 0.5×106 cells·mL-1,the growth of M.wesenbergii was suppressed significantly(P<0.01).