Papers by jean-marc brillouet
Journal of Agricultural and Food Chemistry
Condensed tannins (also called proanthocyanidins) present in strategic tissues of fruits (outer p... more Condensed tannins (also called proanthocyanidins) present in strategic tissues of fruits (outer pericarp and vascular bundles) were known as short polymers of flavan-3-ols. A pretreatment of the plant material (fruits from the grapevine, persimmon) with buffered ascorbic acid and Triton X-100 followed by acetone extraction provided native white fully depolymerizable tannins. Tannins are usually extracted with aqueous solvents and further purified, although artifactual oxidations occur, altering their physicochemical characteristics. Compared to artifactually oxidized tannins prepared according to standard protocols, white tannins (also called leukotannins) exhibit a higher degree of polymerization and a far lower polydispersity.
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OENO One, 1988
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BMC plant biology, 2016
Fruit composition at harvest is strongly dependent on the temperature during the grapevine develo... more Fruit composition at harvest is strongly dependent on the temperature during the grapevine developmental cycle. This raises serious concerns regarding the sustainability of viticulture and the socio-economic repercussions of global warming for many regions where the most heat-tolerant varieties are already cultivated. Despite recent progress, the direct and indirect effects of temperature on fruit development are far from being understood. Experimental limitations such as fluctuating environmental conditions, intra-cluster heterogeneity and the annual reproductive cycle introduce unquantifiable biases for gene expression and physiological studies with grapevine. In the present study, DRCF grapevine mutants (microvine) were grown under several temperature regimes in duly-controlled environmental conditions. A singly berry selection increased the accuracy of fruit phenotyping and subsequent gene expression analyses. The physiological and transcriptomic responses of five key stages sam...
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Journal of Agricultural and Food Chemistry, Apr 30, 2002
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J Agr Food Chem, 1986
... Martine Champ,' Jean-Marc Brillouet,* and Xavier Rouau ... Moreover, several studies sug... more ... Martine Champ,' Jean-Marc Brillouet,* and Xavier Rouau ... Moreover, several studies suggest that they seem to de-crease postprandial hyperglycemia (Jenkins et al., 1980a,b) and cholesterolemia (Mathur et al., 1968) and increase transit rate (Saraswathi and Shurpalekar, 1983 ...
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Carbohyd Res, 1985
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Journal of agricultural and food chemistry, Jan 2, 2015
Interactions between grape tannins/red wine polyphenols and yeast cells/cell walls was previously... more Interactions between grape tannins/red wine polyphenols and yeast cells/cell walls was previously studied within the framework of red wine aging and the use of yeast-derived products as an alternative to aging on lees. Results evidenced a quite different behavior between whole cells (biomass grown to elaborate yeast-derived products, inactivated yeast, and yeast inactivated after autolysis) and yeast cell walls (obtained from mechanical disruption of the biomass). Briefly, whole cells exhibited a high capacity to irreversibly adsorb grape and wine tannins, whereas only weak interactions were observed for cell walls. This last point was quite unexpected considering the literature and called into question the real role of cell walls in yeasts' ability to fix tannins. In the present work, tannin location after interactions between grape and wine tannins and yeast cells and cell walls was studied by means of transmission electron microscopy, light epifluorescence, and confocal micro...
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Journal - Association of Official Analytical Chemists
A collaborative study was conducted to test a new rapid procedure for determination of water-inso... more A collaborative study was conducted to test a new rapid procedure for determination of water-insoluble cell wall (WICW) content in feeds. In the method, starch is solubilized near boiling temperature with Termamyl, a heat-stable alpha-amylase, and proteins are solubilized at 40 degrees C with sodium dodecylsulfate and Pronase. Then, the organic matter of the residue is determined by incineration. Three hours were required to treat 12 different samples, including solubilization treatments, filtrations, and rinses. Eleven unknown products including 9 common feedstuffs of various origin and 2 mixed diets for poultry were analyzed by 7 analysts in France. Coefficients of variation ranged from 2.3 to 6.1%. The results were compared to those for water-insoluble dietary fiber (WIDF), total dietary fiber, and neutral detergent fiber. Agreement was best with the water-insoluble dietary fiber procedure. For most samples, the ratios of WIDF/WICW ranged from 0.981 to 0.842. The differences betw...
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In this communication, we've studied the adsorption of polyphenols in polysulfone membranes, ... more In this communication, we've studied the adsorption of polyphenols in polysulfone membranes, and new-anthocyanin-derived wine pigments were found
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American Journal of Plant Sciences, 2015
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Phytochemistry, 1994
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Progress in Biotechnology, 1996
Rhamnogalacturonan II (RG-II) was present in three fruit-derived products, a red wine, an apple j... more Rhamnogalacturonan II (RG-II) was present in three fruit-derived products, a red wine, an apple juice and a tomato juice, at proximate respective concentrations of 100, 200 and 30 mg/L. Total polysaccharides were recovered by ultrafiltration and RG-II was isolated by size-exclusion and anion-exchange chromatography. The composition of the three isolated fractions included the rare monosaccharides, apiose, 2-O-methyl-l-fucose, 2-O-methyl-d-xylose, Kdo, Dha
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Annals of botany, 2013
Condensed tannins (also called proanthocyanidins) are widespread polymers of catechins and are es... more Condensed tannins (also called proanthocyanidins) are widespread polymers of catechins and are essential for the defence mechanisms of vascular plants (Tracheophyta). A large body of evidence argues for the synthesis of monomeric epicatechin on the cytosolic face of the endoplasmic reticulum and its transport to the vacuole, although the site of its polymerization into tannins remains to be elucidated. The aim of the study was to re-examine the cellular frame of tannin polymerization in various representatives of the Tracheophyta. Light microscopy epifluorescence, confocal microscopy, transmission electron microscopy (TEM), chemical analysis of tannins following cell fractionation, and immunocytochemistry were used as independent methods on tannin-rich samples from various organs from Cycadophyta, Ginkgophyta, Equisetophyta, Pteridophyta, Coniferophyta and Magnoliophyta. Tissues were fixed in a caffeine-glutaraldehyde mixture and examined by TEM. Other fresh samples were incubated w...
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Protoplasma, 2014
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Phytochemistry, 1983
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Phytochemistry, 1996
The 6-O-α-l-Arabinopyranosyl-β-d-glucopyranosides of linalool, benzyl alcohol and 3-methyl-but-2-... more The 6-O-α-l-Arabinopyranosyl-β-d-glucopyranosides of linalool, benzyl alcohol and 3-methyl-but-2-en-1-ol were isolated from passion fruit (Passiflora edulis) by adsorption chromatography on XAD-2 resin, then further extracted on the same resin after partial enzymic hydrolysis and semi-preparative chromatography on RP-18 phase by HPLC. Their structures were identified by 1H NMR spectroscopy and mass spectral analysis and by methylation analysis of the carbohydrate moieties.
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Phytochemistry, 1983
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Journal of the Science of Food and Agriculture, 1989
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Journal of the Science of Food and Agriculture, 1986
ABSTRACT
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Journal of the Science of Food and Agriculture, 1983
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Papers by jean-marc brillouet