Consulta: subjectFacets:"Marine diatom"
Registros recuperados: 4
Data/hora: 08/06/2024 14:30:34

First metabolomic approach of the epiphytic bacteria-marine diatom Haslea ostrearia relationships
Provedor de dados: 5
Autores: Mondeguer, Florence; Lepinay, Alexandra; Capiaux, Hervé; Turpin, Vincent; Baron, Regis; Hess, Philipp; Lebeau, Thierry; Boug,.
The marine diatom Haslea ostrearia [1] produces a water-soluble blue-pigment named marennine [2] of economic interest. But the lack of knowledge of the ecological conditions, under which this microalga develops in its natural ecosystem, more especially bacteria H. ostrearia interactions, prevents any optimization of its culture in well-controlled conditions.  The structure of the bacterial community was analyzed by PCR-TTGE before and after the isolation of H. ostrearia cells recovered from 4 localities, to distinguish the relative part of the biotope and the biocenose and eventually to describe the temporal dynamic of the structure of the bacterial community at two time-scales. The differences in genetic fingerprints, more especially high between two H....
Tipo: Text
Palavras-chave: Haslea ostrearia; Marine diatom; Co-culture microalgae; Bacterial community; PCR-TTGE; High Resolution Mass Spectrometry; Untargeted metabolomics.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00342/45367/44862.pdf

Effect of Bentazon on Growth and Physiological Responses of Marine Diatom: Chaetoceros gracilis
Provedor de dados: 5
Autores: Hourmant, Annick; Amara, Anis; Pouline, Patrick; Durand, Gael; Arzul, Genevieve; Quiniou, Francoise.
The herbicide bentazon (CASRN 25057-89-0) is extensively used in agriculture in Brittany (France) to replace atrazine. Bentazon is not readily adsorbed by soil and therefore it enters adjacent freshwater ecosystems, making its way to estuarine and marine waters areas. Information regarding its effects on marine ecosystems is scarce. Phytotoxicity assessments were conducted in the laboratory on the common diatom Chaetoceros gracilis using both the active ingredient and its formulated product (Basamais). The 3 day EC50 Using cell counts were, respectively, 150 mg/L and 60 mu g/L for bentazon active ingredient and for bentazon-formulated while cellular volume was increased. Although bentazon is known as a photosystem II inhibitor, it produced an increase of...
Tipo: Text
Palavras-chave: Photosynthesis; Marine diatom; Growth; Chlorophylls; Chaetoceros gracilis; Carotenoids; Bentazon; ATP.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6637.pdf

Preliminary metabolomic approach on the bacterial structure community of Haslea ostrearia
Provedor de dados: 5
Autores: Mondeguer, Florence; Lepinay, Alexandra; Capiaux, Hervé; Turpin, Vincent; Lebeau, Thierry.
The marine diatom Haslea ostrearia [1] produces a water-soluble blue-pigment named marennine [2] of economic interest. But the lack of knowledge of the ecological conditions, under which this microalga develops in its natural ecosystem, more especially bacteria H. ostrearia interactions, prevents any optimization of its culture in well-controlled conditions.  The structure of the bacterial community was analyzed by PCR-TTGE before and after the isolation of H. ostrearia cells recovered from 4 localities, to distinguish the relative part of the biotope and the biocenose and eventually to describe the temporal dynamic of the structure of the bacterial community at two time-scales. The differences in genetic fingerprints, more especially high between two H....
Tipo: Text
Palavras-chave: Haslea ostrearia; Marine diatom; Co-culture microalgae; Bacterial community; TTGE; High Resolution Mass Spectrometry; Untargeted metabolomics.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00342/45368/44863.pdf

Intraspecific variation in alkaline phosphatase activity in Phaeodactylum tricornutum (Bacillariophyceae, Bohlin)
Provedor de dados: 39
Autores: Lima,Domênica Teixeira de; Piedras,Fernanda Reinhardt; Nogueira,Flávia Previero; Richard,Eduardo da Cunha; Tocci,Bianca Reis Castaldi; Alba,Jose Juan Barrera; Moser,Gleyci Aparecida Oliveira.
ABSTRACT To describe potential intraspecific variation in phosphorus incorporation in two strains of Phaeodactylum tricornutum (Bohlin), Ub3 and Ub7, alkaline phosphatase (AP) activity was evaluated via enzyme-labeled fluorescence assay. Analysis using the probe ELF-97(r) provides individual evaluation, and therefore can determine the nutritional status of inorganic phosphorus in phytoplanktonic cells. Bioassays compared the control treatment to both phosphate-enriched and phosphate-depleted treatments by varying only the phosphate concentration in the media. The P. tricornutum strains exhibited differences in their development when incubated in the phosphate-enriched media. The development of the Ub7 strain differed by exhibiting "luxury uptake" and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alkaline phosphatase; Auxotrophy; Marine diatom; Organic phosphorus incorporation; Phosphate limitation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300445