Terpenoid-induced algal inhibition and the co-culture of terpene-enriched plants for algal suppression
In order to solve the problem of cyanobacteria bloom in freshwater bodies in summer,Microcystis aeruginosa was taken as the research object,and six terpenoid compounds including menthol,borneol,geraniol,andrographolide,linalool and citral were selected to screen high-efficiency algaecides,and their algaecological effects,mechanisms,application methods and ecological safety were explored.The results showed that geraniol and citral had the best inhibitory effects on Microcystis aeruginosa,and the inhibition rate increased with the increase of concentration.At a concentration of 60mg/L,The maximum inhibition rates of geraniol and citral were 86.9％and 76.0％,respectively.Under the action of geraniol and citral,the chlorophyll a and carotenoid contents of Microcystis aeruginosa decreased,photosynthesis was inhibited;the activity of antioxidant enzymes decreased,and reactive oxygen accumulated in cells;free radicals attacked the cell membrane,and the cell structure was damaged,leading to the death of algal cells.Geraniol and citral did not have the properties of"low promotion and high inhibition".They were less toxic to Chlamydomonas and Brachionus calyciflorus,and had no significant effect on Elodea and Zebrafish,and had a certain ecological safety.Geraniol-rich Melissa officinalis and citral-rich Citronella showed significant algal inhibition in co-culture with Microcystis aeruginosa with algal inhibition rate as high as 95％,which is suitable to be used as floating-bed plants for the prevention and control of cyanobacterial blooms.
万方数据
维普
