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The Dynamics of phenolic concentration in some pasture species and implications for animal husbandry

Piluzza, Giovanna Antonia Maria and Bullitta, Simonetta Maria (2010) The Dynamics of phenolic concentration in some pasture species and implications for animal husbandry. Journal of the Science of Food and Agriculture, Vol. 90 (9), p. 1452-1459. ISSN 0022-5142. Article.

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DOI: 10.1002/jsfa.3963


BACKGROUND: Although secondary metabolites have often been studied considering their primary role as plant-defensive and their effect on consumers detrimental, their effects are usually dose-dependent, so it is important to consider their content at all phenological phases and in different plant organs. In this study the content of total phenolics (TotP), non-tannic phenolics (NTP) and proanthocyanidins (PA) was determined in natural populations of pasture species at defined phenological phases and in different plant organs and also in pathogen-infected plants.
RESULTS: Variation in TotP, NTP and PA contentwas observed in all species, phenological phases and plant organs. Leaf blades were the organs with the highest content in all species. The content of all examined compounds increased in infected leaves, reaching themaximum when 20% of plant tissues were attacked and decreasing at higher infection levels.
CONCLUSION: Delphinidin was found as an appropriate standard related to the PA structure of each plant species. PA concentrations were always in the range considered beneficial for animals, not exceeding 60 g delphinidin equivalent kg−1 dry matter. The Folin–Ciocalteu and butanol/HCl/Fe3+ assays remain the most practical methods for screening large numbers of different plant species for TotP and PA.

Item Type:Article
ID Code:5557
Uncontrolled Keywords:Bioactive compounds, pasture species, phenological phases, proanthocyanidins, total phenolics
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/02 Agronomia e coltivazioni erbacee
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto per il sistema produzione animale in ambiente Mediterraneo, Sassari
Copyright Holders:© 2010 Society of Chemical Industry
Deposited On:16 Feb 2011 09:56

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