营养盐限制对中肋骨条藻产生化感作用的影响  

Effect of nutrient limitation on allelopathy produced of Skeletonema costatum

作　　者：赵卫红[1] 陈玫玫[1] 

机构地区：[1]中国科学院海洋研究所海洋生态与环境科学重点实验室,山东青岛266071

出　　处：《海洋环境科学》2010年第2期225-228,共4页Marine Environmental Science

基　　金：中国科学院知识创新重要方向项目(KZCX2-YW-208-01);国家重点基础研究发展计划"973"项目(2001CB409703)

摘　　要：实验室内开展了东海原甲藻(Prorocentrum donghaiense)、亚历山大藻(Alexandrium tamarense)、中肋骨条藻(Skeletonema costatum)在4种营养条件下生长的中肋骨条藻藻液中的培养实验,4种营养条件下N∶P∶S i分别为16∶1∶16(营养盐充足),4∶1∶16(N限制),64∶1∶64(P限制),16∶1∶4(S i限制)。实验结果显示3种微藻在各种中肋骨条藻藻液中的生长均好于对照组。中肋骨条藻藻液对其自身的促进作用顺序为:营养盐充足>S i限制>N限制>P限制;对亚历山大藻的促进作用为:营养盐充足>S i限制>P限制>N限制;对东海原甲藻促进作用是:P限制>营养盐充足>S i限制>N限制。中肋骨条藻在P限制的条件下对东海原甲藻的生长较明显的促进作用说明,除其它理化因子外,中肋骨条藻在P限制条件下对东海原甲藻等甲藻较强的化感作用可能是东海春季骨条藻赤潮后甲藻赤潮爆发的一种内因。The culture experiments of Prorocentrum donghaiense,Alexandrium tamarense,S, costatum in the Skeletonema costatum cellfree filtrates under four nutrient conditions were conducted. The ratios of nitrogen/phosphorus / silicon of four nutrient conditions are 16/1/16 （ nutrients enough） ,4/1/16 （N-limited） ,64/1/64（ P-limited）, 16：1 ： 4 （ Si-limited）. The results showed that the growths of the three microalgae in the S. costatum cell-free filtrates were better than in the control group. The promotion order of S. costatum cellfree filtrates on itself was nutrients enough 〉 Si-hmited 〉 N-limited 〉 P-limited ,for A. tamarense was nutrients enough 〉 Si-limited 〉 P- limited 〉 N-limited ,for P. donghaiense was P-limited 〉 nutrients enough 〉 Si-limited 〉 N-limited. The obvious promotion of S. costatum under P-limited on P. donghaiense showed that except for other physical and chemical fators,the intense allelopathy of S. costatum on P. donghaiense etc. dinoflagellate under the P-limited condition may be an intrinsic factor for the outbreak of dinoflagellate red tide after S. costatum red tide in spring of the East China Sea.

关 键 词：化感作用 营养盐限制 中肋骨条藻 赤潮 

分 类 号：Q945.78[生物学—植物学]