%0 Journal Article
%T Inhibitory effect of Gracilaria lemaneformis (Bory) Weber Bosse on the co-cultured Scrippsiella trochoidea (Stein) Loeblich III under controlled laboratory conditions<br>龙须菜对锥状斯氏藻抑制作用的机制
%A Shan-dong Zhang
%A Xiu-xian Song
%A Xi-hua Cao
%A Zhi-ming Yu
%A <br>张善东
%A 宋秀贤
%A 曹西华
%A 俞志明
%J 环境科学
%D 2008
%I 
%X Abstract: The inhibitory effects of Gracilaria lemaneiformis on the co-cultured Scrippsiella trochoidea were determined under controlled laboratory conditions, and the possible mechanism was studied. Results showed that : (1) In the separating S. trochoiea- G. lemaneiformis co-culture system when the initial cell density of G. lemaneiformis was set at 0.5 g?L-1, the growth of S. trochoidea was obviously inhibited and its maximum cell density and exponential phase were decreased compared with the control; however, the inhibitory effect was not as stronger as that in the direct cell-cell contact co-culture. Result showed that allelopathy basing on the direct cell contact was the most possible reason leading to the observed result; (2) When the initial cell density of G. lemaneiformis was set at 0.2 g?L-1 in the direct cell-cell contact co-culture, the intracellular nitrate concentration of S. trochoidea in monoculture system was 1.5 times of that in co-culture. It seemed that G. lemaneiformis could competitively absorb the environmental nitrate and ultimately led to the decrease of the stock of intracellular nitrate of S. trochoidea.
%K Key words: Gracilaria lemaneiformis
%K Scrippsiella trochoidea
%K co-culture system
%K intracellular nitrate
%K competitive mechanism<br>关键词：龙须菜，锥状斯氏藻，共培养体系，胞内硝酸盐，竞争机制
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9670A995257245FD38472E6AA26E6CC2&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=5D311CA918CA9A03&sid=8B30EADB51481F94&eid=B6D9E422DA43753D&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=0