鼠尾藻和小珊瑚藻对赤潮异弯藻克生效应的初步研究  

Primary Studies on the Allelopathic Effects of Surgassum thunbergii and Corallina pilulifera on Heterosigam akashiwo

作　　者：曲良[1] 肖慧[1] 王仁君[1] 董栋[1] 冯朝[1] 唐学玺[1] 

机构地区：[1]中国海洋大学海洋生态学研究室,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2007年第4期621-626,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(39870146;40506028);国家高技术研究发展计划项目(2002AA648010);山东省优秀中青年科学家科研奖励(03BS120);中国博士后科学基金(2005037237)资助

摘　　要：通过共培养的方法,比较了鼠尾藻(Surgassum thunbergii)和小珊瑚藻(Corallina pilulifera)新鲜组织、干粉末、水溶性抽提液、培养水的过滤液对赤潮异弯藻(Heterosigam akashiwo)生长的克生效应。结果表明,鼠尾藻和小珊瑚藻的新鲜组织对赤潮异弯藻的生长都具有显著的抑制作用;与鼠尾藻相比,小珊瑚藻的抑制作用更强。2种大型海藻的干粉末在2个高浓度(1.2,2.4 g.L-1)时对赤潮异弯藻的生长都产生了抑制作用,小珊瑚藻的抑制作用更为明显。2种大型海藻高浓度的水溶性抽提液(24 g.L-1)在实验的48 h内使赤潮异弯藻完全致死。在2种大型海藻培养水过滤液对赤潮异弯藻的作用实验中,在一次性添加方式下,小珊瑚藻的培养水过滤液对赤潮异弯藻的生长没有表现出明显的抑制作用,而在半连续添加方式下,却显著抑制了赤潮异弯藻的生长。与小珊瑚藻相比,无论在一次性还是在半连续添加方式下,鼠尾藻的培养水过滤液对赤潮异弯藻的生长都没有显示出显著的抑制作用。Allelopathic effects of fresh tissue, dry powder, aqueous extracts and culture medium filtrate of macroalga Surgassum thunbergii and Corallina pilulifera on the growth of the microalgae Heterosigam akashiwo were tested by using long-term coexistence culture systems. The results showed that the growth of H. akashiwo was strongly inhibited by fresh tissue of Surgassum thunbergii and Corallina pilulifera, in addition the growth inhibition of Corallina pilulifera was more significant. Compared with Surgassum thunbergi, dry powder of Corallina pilulifera inhibited the growth of H. akashiwo more strongly at relatively higher concentrations（I. 2, 2,4 g·L^-1）. Both of the aqueous extracts （24 g·L^-1） of Surgassurn thunbergii and Coralllna pilulifera were lethal to H. akashiwo in 48 h. The culture medium filtrate of Corallina pilulifera exhibited no apparent growth inhibitoryeffect on H. akashiwo under initial filtrate addition while showed apparent growth inhibitory effect under semicontinuous filtrate addition. However, the culture medium filtrate of Surgassurn thunbergii exhibited no apparent growth itlhibltoiy effect on H. akashiwo under initial or semicontinuous filtrate addition.

关 键 词：克生效应 鼠尾藻 小珊瑚藻 赤潮异弯藻 

分 类 号：X171[环境科学与工程—环境科学] Q143[生物学—生态学]