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''Prochloron'' (from the Greek ''pro'' (before) and the Greek ''chloros'' (green) ) is a unicellular oxygenic photosynthetic prokaryote commonly found as an extracellular symbiont on coral reefs, particularly in didemnid ascidians (sea squirts). Part of the phylum cyanobacteria, it was theorized (endosymbiotic theory) that ''Prochloron'' is a predecessor of the photosynthetic components, chloroplasts, found in photosynthetic eukaryotic cells. However this theory is largely refuted by phylogenetic studies which indicate ''Prochloron'' is not on the same line of descent that lead to chloroplast-containing algae and land plants. Prochloron was discovered in 1975 by Ralph A. Lewin of the Scripps Institution of Oceanography. ''Prochloron'' is one of three known prochlorophytes, cyanobacteria that contain both chlorophyll ''a'' and ''b'' bound to a special light-harvesting protein.〔 == Species == The only taxonomically valid species is ''P. didemni''. == References == * * Waterbury, John, et al. Little Things Matter A Lot. Oceanus Magazine. 2004, 43(2). * Yellowlees, David, et al. Metabolic interactions between algal symbionts and invertebrate hosts. Plant, Cell and Environment. 2008, 31, pp. 679–694. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prochloron」の詳細全文を読む スポンサード リンク
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