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首页> 外文期刊>Marine ecology progress series >Phospholipid-derived fatty acids as chemotaxonomic markers for phytoplankton: application for inferring phytoplankton composition
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Phospholipid-derived fatty acids as chemotaxonomic markers for phytoplankton: application for inferring phytoplankton composition

机译：磷脂来源的脂肪酸作为浮游植物化学分类标记：推断浮游植物组成的应用

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摘要

Phospholipid-derived fatty acids (PLFA) are widely used as chemotaxonomic markers in microbial ecology. In this paper we explore the use of PLFA as chemotaxonomic markers for phytoplankton species. The PLFA composition was determined for 23 species relevant to estuarine phytoplankton. The taxonomic groups investigated were Chlorophyceae, Trebouxiophyceae, Prasi-nophyceae, Bacillariophyceae, Dinophyceae, Cryptophyceae, Rhodophyceae, Pavlovophyceae and Prymnesiophyceae. Most of these taxonomic groups have a characteristic PLFA composition, although a few contain truly unique PLFA biomarkers. The PLFA composition was used to derive species composition and abundance of the phytoplankton in the Scheldt estuary (border region between Belgium and the Netherlands) in April, July and October 2003, using the matrix factorization program CHEMTAX. The results agree well with results from HPLC-derived pigment analysis of the same samples. The advantages of using PLFA instead of pigments, or rather in addition to pigments, are that (1) information on bacteria can be derived in addition to information on photosynthetic taxa, (2) in some cases more or different taxa can be distinguished and (3) the isotopic composition of PLFA can be measured relatively easily, allowing the measurement of group-specific primary production.
机译：磷脂衍生的脂肪酸（PLFA）被广泛用作微生物生态学中的化学分类标记。在本文中，我们探索了PLFA作为浮游植物物种化学分类标记的用途。确定了与河口浮游植物有关的23个物种的PLFA组成。调查的生物分类群是叶绿藻科，金线藻科，普拉氏藻科，芽孢杆菌科，迪诺菌科，隐藻科，红景天科，巴氏杆菌科和Pr科。尽管其中一些包含真正独特的PLFA生物标志物，但大多数这些分类学组具有特征性PLFA组成。使用矩阵分解程序CHEMTAX，使用PLFA成分得出2003年4月，7月和10月Scheldt河口（比利时和荷兰之间的边界地区）浮游植物的种类组成和丰度。结果与相同样品的HPLC衍生颜料分析结果非常吻合。使用PLFA代替颜料或除颜料之外的优点是：（1）除了有关光合生物分类信息以外，还可以得出有关细菌的信息;（2）在某些情况下可以区分更多或不同的分类单元，并且（ 3）可以相对轻松地测量PLFA的同位素组成，从而可以测量特定于组的初级生产。

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