Journal
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
Volume 78, Issue 2, Pages 288-295Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09168451.2014.882742
Keywords
saponin; rumen; methane; volatile fatty acid; HPLC
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Funding
- Region Pays de la Loire, France
- ANR (National Research Agency) through the SAPONINES vs. GES project [2008-00286]
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Saponins have the potential to favorably modulate rumen fermentation, but there is generally a lack of the chemical structures associated with the described effects. The activity of extracts from Calendula officinalis and Saponaria officinalis in the rumen was evaluated in vitro. The S. officinalis root extract, reduced CH4 production by 8.5% and increased total VFA concentration by 25.2%. C. officinalis and S. officinalis root extracts and the S. officinalis aerial part extract decreased the acetate to propionate ratio from 8.6 to 17.4%, according to the extract. An HPLC-ELSD analysis indicated that the saponin content ranged from 43.6 to 57.6 mg/g of dry matter (DM) in the C. officinalis extracts and from 224.0 to 693.8 mg/g of DM in the S. officinalis extracts, expressed as the hederacoside C equivalent. Identification of the saponin compounds present in the extracts by HPLC-MSn suggested that the saponin profile modulated the biological activities, showing the importance of determining the structure of saponins when evaluating extracts.
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