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Cited by 313

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Consequences of plant phenolic compounds for productivity and health of ruminants

Open access
Waghorn, Garry C., McNabb, Warren C.·2003·Proceedings of the Nutrition Society

Abstract

Plant phenolic compounds are diverse in structure but are characterised by hydroxylated aromatic rings (e.g. flavan-3-ols). They are categorised as secondary metabolites, and their function in plants is often poorly understood. Many plant phenolic compounds are polymerised into larger molecules such as the proanthocyanidins (PA; condensed tannins) and lignins. Only the lignins, PA, oestrogenic compounds and hydrolysable tannins will be considered here. Lignins slow the physical and microbial degradation of ingested feed, because of resilient covalent bonding with hemicellulose and cellulose, rather than any direct effects on the rumen per se. The PA are prevalent in browse and are expressed in the foliage of some legumes (e.g.Lotus spp.), but rarely in grasses. They reduce the nutritive value of poor-quality diets, but can also have substantial benefits for ruminant productivity and health when improved temperate forages are fed. Beneficial effects are dependent on the chemical and physical structure, and concentration of the PA in the diet, but they have been shown to improve live-weight gain, milk yield and protein concentration, and ovulation rate. They prevent bloat in cattle, reduce gastrointestinal nematode numbers, flystrike and CILt production. Some phenolic compounds (e.g. coumestans) cause temporary infertility, whilst those produced by Fusarium fungi found in pasture, silage or stored grains can cause permanent infertility. The HT may be toxic because products of their metabolism can cause liver damage and other metabolic disorders.

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Metadata

Authors
Waghorn, G. C., & McNabb, W. C.
Venue
Proceedings of the Nutrition Society
Published
2003-05
Volume
62
Issue
2
Pages
383-392
ISSN
  • 0029-6651 (ISSN-L)
  • 1475-2719
OpenAlex
W2144605838
Cited by
313
References
35
FWCI
14.80
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Consequences of plant phenolic compounds for productivity and health of ruminants. https://app.cochat.ai/papers/10.1079/pns2003245
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Waghorn, G. C., & McNabb, W. C. (2003). Consequences of plant phenolic compounds for productivity and health of ruminants. Proceedings of the Nutrition Society. https://doi.org/10.1079/pns2003245

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