粉绿狐尾藻（Myriophyllum aquaticum）对铜绿微囊藻（Microcystis aeruginosa）的化感抑制效应及其生理机制

Eutrophication and algal blooms have been the most serious environmental problems in the world, and biological tools-especially the allelopathic inhibition effects of aquatic macrophytes on phytoplankton growth have been receiving world-wide concern. In our experiments, allelopathic inhibitory effect of Myriophyllum aquaticum culture water on Microcystis aeruginosa and its eco-physiological mechanism were investigated by initial addition assays and continuous addition assays. The results showed that the growth of M. aeruginosa was markedly inhibited by the M. aquaticum culture water; compared to initial addition assays, M. aquaticum exhibited stronger inhibitory potential on M. aeruginosa by continuous addition assays, indicating that allelopathic compounds might be excreted continuously by M. aquaticum, and the inhibition effects wound have the cumulation trail. We also found that the relative content of Chl a, PC and APC of M. aeruginosa decreased to 52.7%, 15.3% and 7.6% respectively after being treated by M. aquaticum culture water for 5 days, and phycobiliprotein (especially APC) decreased more than Chl a. These results suggested that the phycobiliprotein wound be the target of allelopathic inhibition of M. aquaticum on M. aeruginosa, and a new macrophyte to control cyanobactrial blooms wound be found.