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湖泊科学  2007 

芦苇化感组分对羊角月牙藻和雷氏衣藻生长特性的影响

DOI: 10.18307/2007.0417

Keywords: 芦苇,藻类,生长抑制,化感作用

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Abstract:

研究了从芦苇(PhragmitiscommunisTrin)中分离得到的化感组分对羊角月牙藻(Selenastrumcapricornutum)和雷氏衣藻(Chlamydomonasreinhardtii)生长特性的影响。在藻类生长的对数期向培养液中投加不同浓度的化感组分,分别测定并观察了培养期间受试藻种藻密度和藻细胞形态的变化情况。结果表明,该化感组分对羊角月牙藻藻密度的增长具有明显的抑制作用,半效应浓度(EC50.7d)值为0.60m/L,同时使羊角月牙藻细胞内部结构改变,形态变大。投加6mg/L化感组分后,藻细胞平均宽度是对照组的1.5倍。该化感组分对雷氏衣藻藻密度的增长没有明显的抑制作用,但使其运动性能降低。

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