Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/23886
Tipo: Artigo
Título: Increased urea availability promotes adjustments in C/N metabolism and lipid content without impacting growth in Chlamydomonas reinhardtii
Autor(es): Batista, Aline D.
Rosa, Rinamara M.
Machado, Mariana
Magalhães, Alan S.
Shalaguti, Bárbara A.
Gomes, Priscilla F.
Covell, Lidiane
Vaz, Marcelo G. M. V.
Araújo, Wagner L.
Nunes-Nesi, Adriano
Abstract: The use of urea as a nitrogen (N) source by Chlorophytes usually enhances biomass and lipid production when compared to ammonium (NH4+). However, the metabolic shifts displayed byChlamydomonas reinhardtii growing with this organic N source are not known. This study aimed: (i) to characterize the metabolism of C. reinhardtii cultivated in media containing only urea as N source as well as combined with different NH4+ ratios; (ii) to understand how metabolism respond to urea availability. Specific quantification of metabolites using 96-well microplates, and high-performance liquid chromatography combined with non-targeted metabolite profiling by gas chromatography (GC)–time-of-flight (TOF)-mass spectrometry (MS) were used in this study. In addition, GC analysis was used to determine fatty acid profiling. The use of urea did not alter the growth rate in comparison with NH4+. Interestingly, the cell number decreased and the cell size increased proportionally with urea availability. Furthermore, chlorophyll, protein and lipid contents increased with the amount of urea. Regarding the fatty acid profile, oleic acid (C18:1 w8) decreased with amount of urea, while linoleic acid (C18:2 w6) doubled in urea-containing medium. These results indicate that urea promotes remarkable adjustments in metabolism, without drastic changes in biomass, promoting changes in carbohydrate and amino acid metabolism, as well as in lipids production and fatty acid profile.
Palavras-chave: Carbon metabolism
Metabolite and fatty acid profiling
Microalgae
Nitrogen metabolism
Nitrogen source
Urea
Editor: Metabolomics
Tipo de Acesso: Springer Science+Business Media, LLC, part of Springer Nature
URI: https://doi.org/10.1007/s11306-019-1496-3
http://www.locus.ufv.br/handle/123456789/23886
Data do documento: Mar-2019
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