A5106407153- Ruminant Nutrition and Digestive Physiology
- Meat and Animal Product Quality
- Agriculture and Rural Development Research
- Fermentation and Sensory Analysis
- Probiotics and Fermented Foods
- Biofuel production and bioconversion
- Nuts composition and effects
- Horticultural and Viticultural Research
- Plant and fungal interactions
- Botany and Plant Ecology Studies
- Milk Quality and Mastitis in Dairy Cows
- Essential Oils and Antimicrobial Activity
- Culinary Culture and Tourism
- Isotope Analysis in Ecology
- Phytoestrogen effects and research
- Agriculture and Biological Studies
- Crop Yield and Soil Fertility
- Mycotoxins in Agriculture and Food
- Tea Polyphenols and Effects
- Agricultural Productivity and Crop Improvement
- Food composition and properties
- Animal Diversity and Health Studies
- Nutritional Studies and Diet
- Biochemical and biochemical processes
- Coal and Coke Industries Research
Unité Mixte de Recherche sur les Herbivores
2013-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2024
VetAgro Sup
2015-2020
Université Clermont Auvergne
2020
Institut National de la Recherche Agronomique
1994-2016
Clermont Université
2015-2016
Institut National Polytechnique de Toulouse
2007
Physiologie de la Nutrition et du Comportement Alimentaire
2007
Université Claude Bernard Lyon 1
2007
Laboratoire Animal et Agroécosystèmes
2007
The volatile components from nine plants growing on natural grasslands in Auvergne, central France, selected for the broad qualitative and quantitative diversity of their terpenoid fractions, were analyzed by high-resolution gas-phase chromatography mass spectrometry (HRGC−MS) after static headspace solid-phase microextraction (SHS−SPME). SHS−SPME allowed all plant material to be under same conditions despite its wide-ranging composition. This is not always possible with other extraction...
Abstract Phenolic constituents (lignins and phenolic acids) carbohydrates are assembled in a tight architecture which differs according to the plant species. During cell wall digestion, hydrolysis kinetics differ between seem depend chiefly on content organisation of tissue phenolics. Among phenylpropanoids, ferulic acid is released more quickly than p ‐coumaric acid. Lignins remain largely walls. They also undergo transformations, solubilisation as lignin‐carbohydrate complexes. The...
The first objective of the present paper was to assess potential both isotopic (18O/16O in milk water) and molecular biomarkers (terpenes, fatty acids, carotenoids, vitamins) color discriminate production zone (lowland or upland areas) from which 49 tanker bulk milks were collected over one year a total 204 farms. water 18O enrichment higher lowland (<500 m altitude) than (>700 altitude), but δ18O values failed systematically at scale because its high variability related sampling period. In...
The effect of down-regulation tobacco cinnamyl alcohol dehydrogenase (CAD) on cell wall composition and degradability has been assessed. CAD activity was only 20, 16, 14 7%, relative to the controls, in four populations plants (designated 40-1, 40-2, 48 50, respectively) transformed with antisense mRNA. Cell residues stem samples were analysed for polysaccharide composition, gravimetric acetyl bromide lignins lignin nitrobenzene oxidation products. In situ disappearance cellulase solubility...
Abstract Terpene profiles in cheese can be considered a ‘ terroir ’ fingerprint as the information contained it should enable pastures on which animals were fed to recognised. Yet certain elasticity of signature must taken into account when determining authentication strategies, since products acknowledged containing common may have undergone procedures, such making and milk pasteurisation, that could potentially altered their terpene profiles. In this study, Cantal Saint‐Nectaire‐type...
Abstract The extent of disappearance 10 mono‐ and sesquiterpenes in presence mixed rumen micro‐organisms has been measured 24‐h batch cultures. molecules that were tested are frequently found the plants consumed by ruminants highland pastures (limonene, β‐myrcene, β‐ocimene, α‐pinene, sabinene, γ‐terpinene thymol) or potential markers diet (camphene, β‐caryophyllene α‐copaene). All terpenes at 2 µL mL −1 , except α‐copaene thymol, which 0.9 mg respectively. Camphene thymol not degraded to a...
Over the recent years, various teams of INRA centre Clermont Ferrand/Theix have tried to develop analytical techniques recognise dairy cows’ feeding. The consist in identifying and measuring components milk or cheese, which could directly indirectly originate from feed be used trace type forage eaten by cows. Those are terpenes, carotenes fatty acids. purpose this paper is synthesise data obtained trials discuss efficiency pertinence each compound family according context. Terpene profiles...
Phenolic compounds contribute to the micronutrient composition of pasture, which in turn may affect animal product composition. To assess importance and variations content these compounds, polyphenolic botanical compositions 24 permanent pastures located one lowland two upland regions were studied at equivalent stages growth. fractions characterized quantified using HPLC-PDA-ESI-QToF, total was determined by colorimetry over each whole pasture. A rise altitude accompanied a marked increase...
The down regulation of cinnamyl alcohol dehydrogenase (CAD) activity in tobacco stems resulted improved degradability without changes cell wall composition. In this study, some were evidenced solubilization by NaOH, cellulase, and DMSO treatments. Transgenic plants had an altered structure, the components which more accessible to alkali extraction. at same stage maturity, was linked yield acid-precipitated fraction NaOH-soluble extract. Aldehydes that should have been incorporated possibly...
The development of analytical methods to verify the production system meat products requires identification biomarkers that can trace product's origin, and secondly factors govern deposition these markers in animal tissue need be defined. In this study, 2,3-octanedione, skatole terpenes were selected as biomarkers, their was investigated bull calves reared under three different strategies. All animals indoors until approximately 150 days age. They suckled twice a day by mothers, both cows...
Apical internodes of tall fescue (Festuca arundinacea Schreb. var. Clarine) harvested at flowering were sectioned into 5 or 10 equal parts to study in situ degradability and cell wall composition, respectively. The basal (youngest) section had the greatest primary content. Cell walls upper (older) sections highest xylose/arabinose ratio lignin content a rich syringyl units, all typical extensive secondary development. Almost p-coumaric (p-CA) about half ferulic acid (FA) released by 1 M NaOH...
The last decade has seen important developments in the use of carotenoid pigments to authenticate pasture-feeding ruminants. However, dehydrated alfalfa is sometimes incorporated grain-based concentrates fed stall-raised lambs, which may affect reliability authentication methods based on carotenoids plasma and fat, due significant residual levels post-dehydration. aim this study was examine whether other compounds can give additional information diet discriminate pasture-fed lambs from high...
Secondary compounds of grassland and forage plant species such as vitamins or phenolic are involved in different health-promoting effects animals. However, information on their concentration composition remains scarce. The objective this study was to characterize the secondary seven grazed cover crop harvested at two stages growth. Carotenoids tocopherols were characterized quantified using ultraperformance liquid chromatography with a photodiode array, soluble high-performance diode-array...