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漂浮绿藻中缘管浒苔(Ulvalinza)鉴定方法的探索

, PP. 71-79

Keywords: 绿潮,缘管浒苔,形态学,ITS,分子生物学

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Abstract:

以研究漂浮绿藻中的缘管浒苔(\textit{Ulvalinza})为出发点,根据绿藻的形态学特征,选取漂浮绿藻中具有\textit{U.linza}重要特征的藻体进行形态学、分子生物学的分类学研究.结果显示,具有\textit{U.linza}重要特征的漂浮藻体大多为LPP复合体(\textit{U.linza-procera-prolifera})类群(15个样品),而且采自江苏的DF05、\!山东的QD03以及浙江的XS01、XS02等4个固着类型的样品也在该分支中.\textit{Ulvaflexuosa}分支中有2个样品(均为采自福建的固着种类),\textit{Ulvacompressa}分枝包含了如东的4个漂浮样品.采自如东内河、射阳沿海池塘的漂浮藻体也均被包含在LPP复合体中.25个样品中只有4个被鉴定为\textit{U.linza},与其形态特征研究结果相符合.漂浮绿藻的形态学特征与分子生物学研究结果存在很大差别.这说明单纯地依靠传统分类学特征或分子生物学手段对漂浮绿藻中的缘管浒苔(\textit{U.linza})进行分类是不可取的,甚至对漂浮绿藻都不能适用.在同一地点采集到的漂浮绿藻中,大都存在不同形态特征的类型,经过分子生物学分析后被鉴定为不同的种类.根据ITS序列的系统进化树分析结果,绿潮藻中至少存在LPP复合体中的种类以及\textit{U.compressa}.

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