Soma and germ: an experimental approach usingVolvox

Abstract

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Koufopanou Vassiliki and Bell Graham 1993Soma and germ: an experimental approach using VolvoxProc. R. Soc. Lond. B.254107–113http://doi.org/10.1098/rspb.1993.0134SectionRestricted accessArticleSoma and germ: an experimental approach using Volvox Vassiliki Koufopanou Google Scholar Find this author on PubMed Search for more papers by this author and Graham Bell Google Scholar Find this author on PubMed Search for more papers by this author Vassiliki Koufopanou Google Scholar Find this author on PubMed Search for more papers by this author and Graham Bell Google Scholar Find this author on PubMed Search for more papers by this author Published:22 November 1993https://doi.org/10.1098/rspb.1993.0134AbstractThe separation of soma from germ may have originated as a result of a specialization in source and sink, with somatic cells acting as sources, gathering nutrients from the external environment and germ cells as sinks, utilizing nutrients to grow and reproduce. This hypothesis can be tested in an organism, such as Volvox, where single germ cells can be cultured in isolation from the soma, thus serving both as source and sink, and their growth compared with that of germ cells with an intact soma where source and sink are separated into different cells. Results from such an experiment show that germ cells grown with an intact soma had greater rates of increase than those grown with disrupted soma or that were completely isolated, but the difference became greater as nutrient concentration increased, as predicted by the source-and-sink hypothesis. The advantage, however, was not sufficient to compensate fully for the initial investment in soma, especially at low nutrients, perhaps due to the energetic cost of swimming. In nature, species with segregated soma are found in nutrient-rich lakes and ponds. In experimental farm ponds, the biomass of such species increases with eutrophication more than the biomass of related species without division of labour, suggesting an advantage consistent with the source-and-sink.FootnotesThis text was harvested from a scanned image of the original document using optical character recognition (OCR) software. As such, it may contain errors. Please contact the Royal Society if you find an error you would like to see corrected. Mathematical notations produced through Infty OCR. Previous ArticleNext Article VIEW FULL TEXT DOWNLOAD PDF FiguresRelatedReferencesDetailsCited by Miller S and Nozaki H (2023) The multicellular relatives of Chlamydomonas The Chlamydomonas Sourcebook, 10.1016/B978-0-12-822457-1.00012-1, (255-285), . 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