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Abstract
Plant phenols can influence utilization of forages by ruminants through binding with proteins either by complexing with oxidized phenols (products of polyphenol oxidase activity or formed in oxidizing conditions) or by hydrogen binding with tannins. These protein-bound phenols (PBPs) affect rumen metabolism by inhibition of both proteolysis and lipolysis. The aim of this work was to assess the level of polyphenol oxidase (PPO) activity (determined with a range of diphenolic substrates), PBP content, and to identify the main source of variation in different forage ecotypes harvested at different phenological stages. PPO activity was strongly influenced by substrate type with a significant effect of forage ecotype. Forage ecotype and phenological stage also influenced PPO and PBP content. PPO showed a strong relationship with dry matter and phenol content of plants.
Original language | English |
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Pages (from-to) | 678-692 |
Number of pages | 15 |
Journal | Grass and Forage Science |
Volume | 69 |
Issue number | 4 |
Early online date | 19 Sept 2013 |
DOIs | |
Publication status | Published - 01 Dec 2014 |
Keywords
- polyphenol oxidase
- forage ecotype
- plant secondary metabolites
- protein-bound phenol
- Plant secondary metabolites
- Forage ecotype
- Protein-bound phenol
- Polyphenol oxidase
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Dive into the research topics of 'Characterization of polyphenol oxidase activity in a range of forage ecotypes with different phenol substrates: A new insight for PPO and protein-bound phenol evaluation'. Together they form a unique fingerprint.Projects
- 1 Finished
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Regulation of polyphenolics and genetic manipulation of lignins in grasses
Donnison, I., Allison, G. & Bosch, M.
Biotechnology and Biological Sciences Research Council
01 Apr 2008 → 31 Mar 2012
Project: Externally funded research