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塔玛亚历山大藻藻际细菌溶藻过程
Authors
周立红
宁修仁
王新
郑天凌
Publication date
15 July 2007
Publisher
Abstract
海洋微藻在生长过程中向周围环境分泌多种胞外产物,形成细菌自由生长的藻际环境,藻际细菌对微藻的生长有一定的调控作用。在指数生长期的塔玛亚历山大藻培养液中加入φ为1%的2216E培养基,在加入2216E后16h内藻细胞全部裂解。用数码显微镜记录了藻细胞形态变化,分别用DAPI法和荧光模拟底物法测定了细菌数量、胞外酶活性变化,结果表明:在溶藻过程中细菌数量、胞外酶活性在第6小时到第10小时增加了50~100倍。塔玛亚历山大藻藻际细菌主要分布在藻细胞表面,其群落结构改变和数量剧增是溶藻的主要原因,细菌分泌的β-葡萄糖苷酶和几丁质酶可能在溶藻过程中起重要作用
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Last time updated on 16/06/2016