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Proteinqualität verschiedener Rotkleegenotypen unter Berücksichtigung der spezifischen Polyphenoloxidase-Aktivität

Weiher, Nina; Krawutschke, Manuel; Gierus, Martin and Taube, Friedhelm (2011) Proteinqualität verschiedener Rotkleegenotypen unter Berücksichtigung der spezifischen Polyphenoloxidase-Aktivität. [effect of the specific polyphenoloxidase activity on the protein quality of different red clover genotypes.] Paper at: 11. Wissenschaftstagung Ökologischer Landbau, Gießen, 16.-18. März 2011.

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Summary

Increasing protein quality of forages in ruminant nutrition may contribute to reduce nitrogen losses in specialized dairy farms in Europe. Red clover is known to have high polyphenol oxidase (PPO) activity among forage legumes. The enzyme oxidizes phenols to quinones. These highly reactive quinones form stabilized quinone-protein-complexes, protecting protein from fast degradation. The objective of this study was to investigate the effect of the specific PPO activity on the protein fractions of twelve red clover genotypes in two management systems (without and with mechanical stress) in pure red clover swards. The results showed that genotype seem to be of minor importance compared to the variation in PPO activity induced by mechanical stress and particular by cut. Furthermore, with increasing specific PPO activity fraction A decreased and fraction C increased slightly. However, specific PPO activity was poorly related to the protein fractions, expressed by a low R².


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:red clover, polyphenol oxidase, specific PPO-activity, forage legume
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Research affiliation: International Conferences > 2011: Scientific Conference on Organic Agriculture > Pflanze und Boden > Grünland
Related Links:http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=735&suche=11.%20wissenschaftstagung&fb_id=s
Deposited By: Weiher, Nina
ID Code:17397
Deposited On:17 Jun 2011 14:16
Last Modified:11 Jul 2011 08:19
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsbandes der 11. Wissenschaftstagung erschienen.
Leithold, G.; Becker, K.; Brock, C.; Fischinger, S.; Spiegel, A.-K.; Spory, K.; Wilbois, K.-P. und Williges, U. (Hrsg.) (2011):
Es geht ums Ganze: Forschen im Dialog von Wissenschaft und Praxis
Beiträge zur 11. Wissenschaftstagung Ökologischer Landbau, Justus-Liebig-Universität Gießen, 15.-18. März 2011
Band 1: Boden, Pflanze, Umwelt, Lebensmittel und Produktqualität
Band 2: Tierproduktion, Sozioökonomie
Verlag Dr. Köster, Berlin.
Der Tagungsband kann über den Verlag Dr. Köster bezogen werden; siehe: http://verlag-koester.de/buch.php?id=735&fb_id=37

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