HARMFUL CYANOBACTERIA CONTROL BY BARLEY STRAW – ALLELOPATHIC MECHANISM AND APPLICATION
Harmful algae bloom (HAB), in particular cyanobacterial bloom, is becoming a worldwide aquatic problem. The allelopathic inhibition of algae by plants has showed enormous potential in HAB control. Among them, the use of barley straw is by far most successful. In this research, inhibitory effects and action modes of oriental type of barley - Tibetan barley were proved, in addition to the widely reported validity of algal inhibition effects by their occidental relative; algicidal effects of barley straw decomposing prepared by eight different procedures were systematically compared, and the general laws of this allelopathy were discussed by the use of non-linear mathematical model; a estimation of the potential algicidal effects of oriental barley straw applied in typical eutrophic Chinese waters was also performed. The natural chemicals in barley straw were screened, and the key allelochemical, which effectively inhibits cyanobacteria growth, was isolated and identified through bioassay-guided natural product chemistry procedures, and its mechanism was also studied on the single cell level. Furthermore, the cyanobacterial inhibition abilities of series of natural flavonoids were studied based on the quantified structure and activity relationship (QSAR) analysis, to facilitate the future application of this method. The observation in this work will provide a theoretical gist and technology guide for the use of barley straw methods in algal control filed; meanwhile this work could also contribute to the recycle and reuse of agricultural wastes like straws.
Xiao, X., Zhejiang University, China, email@example.com
Huang, H. M., Zhejiang University, China
Location: Sweeney Ballroom B
Presentation is given by student: No