Individual and combined effects of oleic acid and biofilm on Microcystis aeruginosa pcc7806
The effects of oleic acid (OA) and biofilm, singly or in combination, on Micorcystis aeruginosa pcc7806 and the allelopathic mechanisms were inverstigated using batch culture algal inhibition tests. The changes of chlorophyll-a and photosystem II parameters and responses of the antioxidative defense system were tested. The results showed that individual oleic acid and biofilm can significantly inhibit the growth of M. aeruginosa pcc7806. When individually exposed to 10.0 mg/L OA or 0.16 g biofilm after 6 days, the growth of M. aeruginosa were significantly inhibited by 79% and 15% lower than that of the control, respectively. Our results also confirmed that the interaction between OA and biofilm was synergistic. When exposed to 10.0mg/L OA and 0.16 g biofilm combined after 6days, the growth of M. aeruginosa was inhibited by 95% lower than that of the control. Interaction between oleic acid and biofilm can damage the plasma membranes of the algal cells, degrade the chlorophyll-a, inhibit the Photosynthetic efficiency, especially, the potosystemⅡ, lead to activation of the antioxidative defense system and cause MDA accumulation within the cells. We proposed that the biofilm system regulated with oleic acid may be an useful technique to efficiently control cyanobacterial bloom.
Jiantuan Huang Bangding Xiao Chunbo Wang Jian Xiong Cuicui Tian
国际会议
武汉
英文
72
2011-04-05（万方平台首次上网日期，不代表论文的发表时间）