浒苔对米氏凯伦藻生长的克生作用  

Allelopathic effects of Ulva prolifera on growth of Karenia mikimotoi

作　　者：霍元子[1] 田千桃[1] 徐栅楠 王阳阳[1] 冯子慧[1] 房毅[1] 何培民[1] 

机构地区：[1]上海海洋大学水产与生命学院水域环境生态上海高校工程研究中心,上海201306

出　　处：《海洋环境科学》2010年第4期496-499,508,共5页Marine Environmental Science

基　　金：国家自然科学基金(2007AA09Z406);上海市浦江人才计划项目(05PJ14086);上海市优秀学科带头人计划项目(08XD14037);上海市水生生物学重点学科资助项目(S30701);上海高校选拔培养优秀青年教师科研专项基金(ssc08002)

摘　　要：研究了浒苔(Ulva prolifera)对赤潮微藻米氏凯伦藻(Karenia mikimotoi)的克生效应。结果表明,浒苔鲜组织对米氏凯伦藻的生长具有强烈的克生效应;一次性添加浒苔培养水过滤液对米氏凯伦藻生长没有显著的抑制作用,而半连续添加对米氏凯伦藻生长具有显著的克生作用;浒苔干粉末和水溶性抽提液对米氏凯伦藻的生长产生显著的抑制作用。实验结果证明抑制米氏凯伦藻生长物质很可能更多地存在于浒苔组织内,向环境中分泌的克生物质较少,因而克生物质的连续分泌是有效克制米氏凯伦藻生长的关键。同时,克生作用存在着明显的浓度效应,当抑制物浓度达到一定阈值才表现明显的克生作用,在阈值之上浓度越高克生作用越强。Allelopathic effects of Ulva prolifera on the harmful algae Karenia mikimotoi were studied in laboratory.The results showed that the growth of K.mikimotoi was significantly（P0.05） lowered by fresh tissue of U.prolifera;The growth of K.mikimotoi was not significantly（P0.05） lowered by U.prolifera culture medium filtrate under initial filtrate addition,but,the growth of K.mikimotoi was strongly inhibited by macroalga cuhure medium fihrate under semicontinuous filtrate addition.The growth of K.mikimotoi was strongly inhibited by dry powder and aqueous extract of U.prolifera.The results showed that allelochemicals were more existed in the tissue of U.prolifera than excreted to the medium and continuous addition of allelochemicals was important to effectively control the growth of K.mikimotoi.The Concentration effect of antagonistic relationship was existed between U.prolifera and K.mikimotoi.

关 键 词：浒苔 米氏凯伦藻 克生效应 绿潮 

分 类 号：Q143[生物学—生态学] Q178[生物学—普通生物学]