Revue sur les méthodes de dosage de la lignine utilisées en alimentation animale

Giger, Sylvie

doi:10.1051/animres:19850107

Cited by 31 publications

(15 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Demethylation of dietary lignins in faecal samples was suggested in several early studies [143,152,161,163,171,172] and thought to occur mainly in the rumen [173]. However, the chemical methods used in these studies to measure demethylation may have overestimated the phenomenon.…”

Section: Demethylationmentioning

confidence: 99%

Transformations of structural phenylpropanoids during cell wall digestion

Besle

Jouany

Cornu

1995

FEMS Microbiology Reviews

View full text Add to dashboard Cite

Phenylpropanoids limit the degradation of cell walls of roughages in herbivores but at the same time undergo transformations in the digestive tract. This review outlines the main transformations that occur in the rumen. All the monomeric aromatics tested are fully degraded under anaerobic conditions which favour electron transfer. Six main strains of bacteria degrade monomeric phenols in the rumen by several mechanisms. In addition, some fungi and bacteria are able to release, and possibly to metabolise the esterified hydroxycinnamic acids found in forage cell walls. The first step in the degradation of these acids is their reduction to non‐toxic compounds, which are often growth factors. However, total degradation of monoaromatics is difficult to achieve in vivo because of the small population of organisms able to metabolise them abd the limited transit time of the substrates in the rumen. Oligolignols are also degraded to different extents depending on their size and molecular structure. Lignins are partly solubilised during cell wall degradation. They may also undergo other transformations such as demethylation and dehydroxylation. The amount of lignin that seems to be degraded in rumen fluid is low but probably higher than under other anaerobic environments over the same period of time. It is generally accepted that the digestibility of forage lignins is low. However, the wide range of values measured (from minus 0.46 to 0.64) is related either to the measurement method or to the transformations that the lignins may undergo in the digestive tract, or to both. An indigestible fraction of lignins could serve as a reliable cell wall marker but none of the fractions used to date has proved entirely satisfactory for this purpose. Future research in this field would involve better knowledge about the transformation of phenylpropanoids and the development of microbial activity on these compounds. This would improve phenolics degradation and consequently carbohydrate utilization.

show abstract

Section: Demethylationmentioning

confidence: 99%

Transformations of structural phenylpropanoids during cell wall digestion

Besle

Jouany

Cornu

1995

FEMS Microbiology Reviews

View full text Add to dashboard Cite

show abstract

“…Les lignines des parois végétales sont relativement bien identifiées au plan biochimique (Monties, 1980), mais leur analyse dans les aliments et les digesta des animaux demeure très imprécise (Giger, 1985).…”

Section: Introductionunclassified

Apports de lignines et alimentation du lapin en croissance. I. Conséquences sur la digestion et le transit

Gidenne¹,

Pérez²,

Lapanouse³

et al. 1994

Ann. Zootech.

View full text Add to dashboard Cite

“…d'une ration mixte sur la base de ses caractéristiques analytiques moyennes. En outre, la bibliographie indique que cette démarche n'a été que rarement appliquée dans les pays étrangers (Pn Q unY, DE B AERE & LoussE, 1966 (E DWARDS , 1973 ;A ERTS et al, 1977), mais inférieure aux valeurs habituellement proposées (G IGER , 1985). La fig.…”

unclassified