Re-examination of the Algal Class Chrysophyceae Using Gene Sequences and Electron Microscopy

小行星9419498 世界上的淡水和海洋藻类是一组重要的光合生物，通常与植物和真菌一起进行植物学研究。 在海洋中，它们是海洋动物的主要食物。 绿藻纲是一类以其金色（由于光合色素和储存化合物）为特征的藻类;尽管它们的外部形态简单，但它们在生理学和超微结构上是多样的。 在过去的三十年里，积极的海洋学探索，其次是电子显微镜和分子生物学的实验室研究表明，许多不寻常的金藻被错误分类或只是错过了以前的研究。 此外，最初的分类金藻，反映了一个简单的识别方案的需要，把重点放在鞭毛和其他外部细胞壁的字符可观察到的光学显微镜，功能，现在被怀疑代表收敛进化的实例，以适应开放的海洋条件。 毕格罗实验室的罗伯特·安德森博士及其同事将研究来自大西洋、太平洋和印度洋探险的新的金藻标本，重点是精细尺度内部特征的电子显微镜观察和基因测序。 将从单个菌株的核和叶绿体基因组中积累DNA数据。 一个现代和可靠的系统分类的蓝藻将有利于那些在海洋生态学，生物多样性，水产养殖和海洋生物技术领域的工作。 ??

9419498 Andersen The world's freshwater and marine algae are an important group of photosynthetic organisms, usually studied botanically with plants and fungi. In the oceans they provide the primary food for marine animals. The Chrysophyceae are one group of algae characterized by their golden color (due to photosynthetic pigments and storage compounds); despite their simple external morphology, they are diverse physiologically and ultrastructurally. Over the last three decades, active oceanographic exploration followed by laboratory studies in electron microscopy and molecular biology have shown that numerous unusual chrysophytes were misclassified or simply missed in previous studies. Furthermore, the original classification of chrysophytes, reflecting a need for a simple identification scheme, placed emphasis on flagella and other external cell wall characters observable with light microscopy, features that are now suspected to represent instances of convergent evolution in adapting to open-ocean conditions. Dr. Robert Andersen of the Bigelow Laboratory and colleagues will study new collections of chrysophytes from Atlantic, Pacific, and Indian ocean expeditions, with emphasis on electron microscopy of fine-scale internal features and on gene sequencing. DNA data will be accumulated from both nuclear and chloroplast genomes of individual strains. A modern and reliable systematic classification of the Chrysophyceae will benefit those working in areas of marine ecology, biodiversity, aquaculture, and marine biotechnology. ??