Effects of condensed tannins in white clover flowers on their digestion in vitro

Burggraaf, V. T.; Waghorn, G. C.; Woodward, S.L.; Thom, E. R.

doi:10.1016/j.anifeedsci.2007.07.001

Cited by 19 publications

(17 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The risk of bloating can be minimized by mixed cropping with grasses. Although white clover flowers contain condensed tannins, they are at insufficient levels to influence proteolysis in the rumen, and future efforts need to focus on foliar expression of condensed tannins (Burggraaf et al, 2008).…”

Section: B Preferential Adaptation and Utilizationmentioning

confidence: 99%

“…There is increasing awareness of the importance of condensed tannins (CTs) or proanthocyanidins that stabilize proteins in the rumen and prevent bloat, with associated environmental benefits through reduced losses of N. CTs are absent from the leaves of white or red clover but present in their inflorescences. Exploiting the CTs in inflorescences is one approach that has been studied (Burggraaf et al, 2008). Inclusion in mixtures of a species such as birdsfoot trefoil (Julier et al, 2003;Collins et al, 2006;Abberton et al, 2008), which contains high levels of CTs in its leaves, is an alternative strategy which requires the development of varieties of this species which can persist in mixed swards .…”

Section: White Clovermentioning

confidence: 99%

See 1 more Smart Citation

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Annicchiarico¹,

Barrett²,

Brummer³

et al. 2014

Critical Reviews in Plant Sciences

233

View full text Add to dashboard Cite

Section: B Preferential Adaptation and Utilizationmentioning

confidence: 99%

Section: White Clovermentioning

confidence: 99%

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Annicchiarico¹,

Barrett²,

Brummer³

et al. 2014

Critical Reviews in Plant Sciences

233

View full text Add to dashboard Cite

“…Nutritional Implication for Grazing Animals on White Clover Burggraaf et al (2008) posited that protein in white clover is poorly utilized by ruminants because of its extensive degradation to ammonia in the rumen. Beever et al…”

Section: Animal Feeding Value and Nutrient Compositionmentioning

confidence: 99%

A Novel Approach to Grass–Legume Management

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The fact that the growth had no effect also means that the large variations in fatty acid compositions between the growths neither increased nor decreased the rate of hydrogenation. Instead, the plant effect on hydrogenation could be because of the presence of plant secondary metabolites, such as condensed tannins that have been shown to inhibit the terminal step of ruminal hydrogenation (Khiaosa-Ard et al, 2009), and can be found in white clover in high-enough amounts to have an effect on rumen metabolism (Burggraaf et al, 2008). However, in the present study, the rate of hydrogenation from monounsaturated fatty acids to stearic acid was similar for all types of silages, suggesting that these metabolites may not be present in sufficient amounts to exert any effect on the hydrogenation process.…”

Section: Model Resultsmentioning

confidence: 99%

“…The enzyme polyphenol oxidase, present in red clover, has been attributed to reduce lipolysis in the rumen when present, and by doing so reducing hydrogenation as well (Lee et al, 2008;Cabiddu et al, 2010). In addition, condensed tannins may reduce proteolysis, alter the distribution between individual volatile fatty acids produced in the rumen (Burggraaf et al, 2008) and inhibit the terminal step of hydrogenation, resulting in an accumulation of vaccenic acid (Khiaosa-Ard et al, 2009). Tannins can be found at varied levels in legumes such as red and white clover (Patra and Saxena, 2011).…”

Section: Introductionmentioning

confidence: 99%

Differences in rate of ruminal hydrogenation of C18 fatty acids in clover and ryegrass

Lejonklev

Storm

Larsen

et al. 2013

Animal

View full text Add to dashboard Cite

Biohydrogenation of C18 fatty acids in the rumen of cows, from polyunsaturated and monounsaturated to saturated fatty acids, is lower on clover than on grass-based diets, which might result in increased levels of polyunsaturated fatty acids in the milk from clover-based diets affecting its nutritional properties. The effect of forage type on ruminal hydrogenation was investigated by in vitro incubation of feed samples in rumen fluid. Silages of red clover, white clover and perennial ryegrass harvested in spring growth and in third regrowth were used, resulting in six silages. Fatty acid content was analysed after 0, 2, 4, 6, 8 and 24 h of incubation to study the rate of hydrogenation of unsaturated C18 fatty acids. A dynamic mechanistic model was constructed and used to estimate the rate constants ( k, h) of the hydrogenation assuming mass action-driven fluxes between the following pools of C18 fatty acids: C18:3 (linolenic acid), C18:2 (linoleic acid), C18:1 (mainly vaccenic acid) and C18:0 (stearic acid) as the end point. For k C18:1,C18:2 the estimated rate constants were 0.0685 (red clover), 0.0706 (white clover) and 0.0868 (ryegrass), and for k C18:1,C18:3 it was 0.0805 (red clover), 0.0765 (white clover) and 0.1022 (ryegrass). Type of forage had a significant effect on k C18:1,C18:2 ( P , 0.05) and a tendency to effect k C18:1,C18:3 ( P , 0.10), whereas growth had no effect on k C18:1,C18:2 or k C18:1,C18:3 ( P . 0.10). Neither forage nor growth significantly affected k C18:0,C18:1 , which was estimated to be 0.0504. Similar, but slightly higher, results were observed when calculating the rate of disappearance for linolenic and linoleic acid. This effect persists regardless of the harvest time and may be because of the presence of plant secondary metabolites that are able to inhibit lipolysis, which is required before hydrogenation of polyunsaturated fatty acids can begin.Keywords: clover, fatty acids, hydrogenation, ruminal, ryegrass ImplicationsEfforts are being made to improve ruminal foods, such as meat and milk, to make them more beneficial for human health. Fat content, with regard to saturated and unsaturated fats, has received a lot of attention. In the present study, the effects of red and white clover silages on fatty acid metabolism in the cow rumen were studied in vitro. Both types of clover silages were found to have similar effects on the fatty acid metabolism, which could potentially be used to determine feed types that could increase concentrations of unsaturated fatty acids in milk.

show abstract

Effects of condensed tannins in white clover flowers on their digestion in vitro

Cited by 19 publications

References 24 publications

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

A Novel Approach to Grass–Legume Management

Differences in rate of ruminal hydrogenation of C18 fatty acids in clover and ryegrass

Contact Info

Product

Resources

About