n-Alkan-2-ones in peat-forming plants from the Roñanzas ombrotrophic bog (Asturias, northern Spain) |
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Authors: | José E Ortiz Arantxa Díaz-BautistaJuan José Aldasoro Trinidad TorresJosé Luis R Gallego Laura MorenoBelén Estébanez |
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Institution: | a Biomolecular Stratigraphy Laboratory, E.T.S.I. Minas, Universidad Politécnica de Madrid, C/Ríos Rosas 21 - 28003 Madrid, Spain b Real Jardín Botánico de Madrid, Plaza de Murillo 2 - 28014 Madrid, Spain c Environmental Biotechnology and Geochemistry Group. Campus de Mieres, Universidad de Oviedo, C/Gonzalo G, s/n - 33600 Mieres, Asturias, Spain d Facultad de Ciencias (Biología), Universidad Autónoma de Madrid, Campus de Cantoblanco, C/Darwin 2 - 28049 Madrid, Spain |
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Abstract: | We determined the distribution of lipids (n-alkanes and n-alkan-2-ones) in present-day peat-forming plants in the Roñanzas Bog in northern Spain. Consistent with the observation of others, most Sphagnum (moss) species alkanes maximized at C23, whereas the other plants maximized at higher molecular weight (C27 to C31). We show for the first time that plants other than seagrass and Sphagnum moss contain n-alkan-2-ones. Almost all the species analysed showed an n-alkan-2-one distribution between C21 and C31 with an odd/even predominance, maximizing at C27 or C29, except ferns, which maximized at lower molecular weight (C21-C23). We also observed that microbial degradation can be a major contributor to the n-alkan-2-one distribution in sediments as opposed to a direct input of ketones from plants. |
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