Effects of the aquatic eztracts of Arundo donaz L. on the growth of freshwater algae

摘要：

In recent years, a novel and environment-friendly method to control algal blooms based on allelopathic inhibition of macrophytes on algae has drawn much attention. We studied the effects of aquatic extract of Arundo donax L. (giant reed) on the growth of four freshwater algae bloom-forming toxic cyanobacterium (Microcystis aeruginosa) and green algae (Selenastrum capricornutum, Scenedesmus obliquus, and Chlorella pyrenoidosa) to control algal blooms. In bioassays, giant reed extract inhibited the growth of M. aeruginosa and its cell size was reduced with increase in extract concentration. However, the extract stimulated the growth of both S. capricornutum and S. obliquus. Most spindle-shaped cells of S. obliquus turned into rotundity, i.e. cell polarity was destroyed by the extract. The extract had a variable effect on the growth of C. pyrenoidosa. In the prophase of incubation, the cells of C. pyrenoidosa treated with the extract were significantly larger than control. Thus allelopathic effects of extract of A. donax L. on algae were strain-specific and A. donax L. may control the toxic cyanobacterium M. aeruginosa.

关键词： Algal blooms algal control allelopathy Arundo donaz L. Chlorella pyrenoidosa giant reed Microcystis aeruginosa Scenedesmus obliquus Selenastrum capricornutu

作者: Yu Hong Hong-Ying Hu Akiyoshi Sakoda Masaki Sagehashi Fengmin Li

作者单位: Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, PR China Institute of Industrial Science, University of Tokyo, Japan College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China

会议类型: 国际会议

会议名称: 第七届中日水环境研讨会暨NSFC-JST重大国际合作项目成果交流会

会议地点: 北京

会议语种:英文

页码: 74-83

在线出版日期: 2007-10-25（万方平台首次上网日期，不代表论文的发表时间）