Consulta: creatorFacets:"Lecellier, Gael"
Registros recuperados: 6
Data/hora: 06/06/2024 06:54:20

Dimethylsulfoniopropionate concentration in coral reef invertebrates varies according to species assemblages
Provedor de dados: 5
Autores: Guibert, Isis; Bourdreux, Flavien; Bonnard, Isabelle; Pochon, Xavier; Dubousquet, Vaimiti; Raharivelomanana, Phila; Berteaux-lecellier, Véronique; Lecellier, Gael.
Dimethylsulfoniopropionate (DMSP) is a key compound in the marine sulfur cycle, and is produced in large quantities in coral reefs. In addition to Symbiodiniaceae, corals and associated bacteria have recently been shown to play a role in DMSP metabolism. Numerous ecological studies have focused on DMSP concentrations in corals, which led to the hypothesis that increases in DMSP levels might be a general response to stress. Here we used multiple species assemblages of three common Indo-Pacific holobionts, the scleractinian corals Pocillopora damicornis and Acropora cytherea, and the giant clam Tridacna maxima and examined the DMSP concentrations associated with each species within different assemblages and thermal conditions. Results showed that the...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00636/74777/74951.pdf

Differential effects of coral-giant clam assemblages on biofouling formation
Provedor de dados: 5
Autores: Guibert, Isis; Bonnard, Isabelle; Pochon, Xavier; Zubia, Mayalen; Sidobre, Christine; Lecellier, Gael; Berteaux-lecellier, Veronique.
To prevent the settlement and/or the growth of fouling organisms (i.e. bacteria, fungi or microalgae), benthic sessile species have developed various defense mechanisms among which the production of chemical molecules. While studies have mostly focused on the release of chemical compounds by single species, there exist limited data on multi-species assemblages. We used an integrative approach to explore the potential interactive effects of distinct assemblages of two corals species and one giant clam species on biofouling appearance and composition. Remarkably, we found distinct biofouling communities suggesting the importance of benthic sessile assemblages in biofouling control. Moreover, the assemblage of 3 species led to an inhibition of biofouling,...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00659/77132/78488.pdf

Ethnobotanical survey of cosmetic plants used in Marquesas Islands (French Polynesia)
Provedor de dados: 5
Autores: Jost, Xenia; Ansel, Jean-luc; Lecellier, Gael; Raharivelomanana, Phila; Butaud, Jean-francois.
Background: Cosmetic plants and their uses have often been neglected in ethnobotanical surveys which focus mainly on plants with medicinal or food uses. Thus, this survey was carried out to specifically investigate cosmetics in a small community and to establish a cosmetopoeia, based on the model of pharmacopoeia for medicinal plants. The geographic spread of the survey covered the Marquesas Islands, one of the five archipelagos of French Polynesia (Pacific Ocean). This archipelago was also recently investigated for its pharmacopoeia. Methods: This survey is based on individual interviews of Marquesan informants on the islands of Tahiti (Society archipelago) and Nuku Hiva (Marquesas archipelago). The methodological approach was semi-directive with...
Tipo: Text
Palavras-chave: Cosmetopoeia; Cosmetics; French Polynesia; Marquesas Islands; Pacific Ocean; Ethnobotanical survey.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00664/77567/79532.pdf

Tamanu oil and skin active properties: from traditional to modern cosmetic uses
Provedor de dados: 5
Autores: Raharivelomanana, Phila; Ansel, Jean-luc; Lupo, Elise; Mijouin, Lily; Guillot, Samuel; Butaud, Jean-francois; Ho, Raimana; Lecellier, Gael; Pichon, Chantal.
Calophyllum inophyllum L. (Calophyllaceae), locally called "tamanu" in French Polynesia, is an evergreen pantropical tree growing mostly along the seashores. Its barks, leaves, and fruits are still used in traditional medicine. The oil expressed from the nuts has been also traditionally used. Tamanu oil is topically applied on skins as well as mucous membrane lesions. This oil is especially recommended to heal all kinds of skin ailments. Bioassays and different assessments of Tamanu oil revealed numerous biological activities (antioxidant, anti-inflammatory, antibacterial, wound healing...), so bringing scientific evidence of beneficial effects of this oil on human skin healing. Such biological properties may explain the use of tamanu oil as an active...
Tipo: Text
Palavras-chave: Huile de tamanu; Calophyllum inophyllum; Cosmétopée; Néoflavonoïdes; Ingrédient cosmétique; Tamanu oil; Calophyllum inophyllum; Cosmetopoeia; Neoflavonoids; Cosmeceutical.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00660/77218/78679.pdf

Symbiodinium     clades A and D differentially predispose     Acropora cytherea     to disease and     Vibrio     spp. colonization
Provedor de dados: 5
Autores: Rouze, Heloise; Lecellier, Gael; Saulnier, Denis; Berteaux-lecellier, Veronique.
Coral disease outbreaks have increased over the last three decades, but their causal agents remain mostly unclear (e.g., bacteria, viruses, fungi, protists). This study details a 14-month-long survey of coral colonies in which observations of the development of disease was observed in nearly half of the sampled colonies. A bimonthly qPCR method was used to quantitatively and qualitatively evaluate Symbiodinium assemblages of tagged colonies, and to detect the presence of Vibrio spp. Firstly, our data showed that predisposition to disease development in general, and, more specifically, infection by Vibrio spp. in Acropora cytherea depended on which clades of Symbiodinium were harbored. In both cases, harboring clade D rather than A was beneficial to the...
Tipo: Text
Palavras-chave: Coral disease; Dynamic; Resistance; Symbiodinium assemblages; Vibrio.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00307/41848/41080.pdf

R. nukuhivensis acts by reinforcing skin barrier function, boosting skin immunity and by inhibiting IL-22 induced keratinocyte hyperproliferation
Provedor de dados: 5
Autores: Abdallah, Florence; Lecellier, Gael; Raharivelomanana, Phila; Pichon, Chantal.
Rauvolfia nukuhivensis is a well-known plant used for its wide range of beneficial effects in Marquesas islands. It is made up of diverse indole alkaloids and is used as traditional medicine for skin application. The actual mechanism behind the virtue of this plant is still unknown. Hence, in this study we aimed at deciphering the impact of R. nukuhivensis on skin immune system in context of (1) homeostasis, (2) pathogen infection and (3) inflammation. Here we show that R. nukuhivensis enhances cellular metabolic activity and wound healing without inducing cellular stress or disturbing cellular homeostasis. It reinforces the epithelial barrier by up-regulating hBD-1. Nevertheless, in pathogenic stress, R. nukuhivensis acts by preparing the immune system to...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00659/77130/78499.pdf