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| Bedoux, Gilles; Hardouin, Kevin; Marty, Christel; Taupin, Laure; Vandanjon, Laurent; Bourgougnon, Nathalie. |
| The photoadaptive responses of macroalgal communities to abiotic stresses have been studied, and a number of UV-absorbing molecules have been identified. Among these compounds, photoprotective compounds such as mycosporine-like amino acids and carotenoids have been isolated from various red macroalgal species. However, several substances still need to be characterized. We describe the preparation of photoprotective extracts obtained from Solieria chordalis. Two solvents, 2-octyl dodecanol and octyldodecyl ester of L-pyrrolidone carboxylic acid, were selected based on their cosmetic functions for performing an ultrasound-assisted extraction. The efficiency of extraction was monitored by spectrophotometry and in vitro photoprotective activity measurements.... |
| Tipo: Text |
Palavras-chave: Mycosporine-like amino acid; Palythenic acid; Photoprotective activity; Solieria chordalis. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00213/32376/30834.pdf |
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| Le Bloa, Simon; Durand, Lucile; Cueff-gauchard, Valerie; Le Bars, Josiane; Taupin, Laure; Marteau, Charlotte; Bazire, Alexis; Cambon-bonavita, Marie-anne. |
| Rimicaris exoculata is a caridean shrimp that dominates the fauna at several hydrothermal vent sites of the Mid-Atlantic Ridge. It has two distinct and stable microbial communities. One of these epibiontic bacterial communities is located in the shrimp gut and has a distribution and role that are poorly understood. The second colonizes its enlarged gill chamber and is involved in host nutrition. It is eliminated after each molt, and has colonization processes reminiscent of those of a biofilm. The presence and expression of genes usually involved in quorum sensing (QS) were then studied. At four sites, Rainbow, TAG, Snake Pit and Logatchev, two lux genes were identified in the R. exoculata epibiontic community at different shrimp molt stages and life... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00377/48841/49268.pdf |
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| Lalegerie, Fanny; Lajili, Sirine; Bedoux, Gilles; Taupin, Laure; Stiger-pouvreau, Valerie; Connan, Solène. |
| To cope with the biotic and abiotic stresses experienced within their environment, marine macroalgae have developed certain defence mechanisms including the synthesis of photo-protective molecules against light and particularly harmful UV radiation. The aim of this study was to screen selected red algae, a highly diverse phylogenetic group, for the production of photo-protective molecules. The pigment content and composition (i.e. chlorophyll-a, phycobiliproteins and carotenoids) and the composition of mycosporine-like amino acids (MAAs) were studied in 40 species of red macroalgae collected in Brittany (France), at two distinct periods (i.e. February and July 2017). A high inter-specific variability was demonstrated in terms of pigment content and MAA... |
| Tipo: Text |
Palavras-chave: Algae; Diversity; HPLC; MAAs; Metabolites; Photo-protection; Pigments; Rhodophyta; Screening. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/59929/63133.pdf |
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