Ergovaline and lolitrem B concentrations in perennial ryegrass in field culture in southern France: distribution in the plant and impact of climatic factors - PubMed (original) (raw)

. 2014 Dec 31;62(52):12707-12.

doi: 10.1021/jf504581y. Epub 2014 Dec 19.

Affiliations

• PMID: 25526521
• DOI: 10.1021/jf504581y

Ergovaline and lolitrem B concentrations in perennial ryegrass in field culture in southern France: distribution in the plant and impact of climatic factors

Céline Repussard et al. J Agric Food Chem. 2014.

Abstract

Perennial ryegrass (Lolium perenne) infected by Epichloë festucae var. lolii contains alkaloids that are responsible for toxicosis in several countries, but few cases are reported in Europe. Lolitrem B is generally the most abundant alkaloid and is recognized to be responsible for livestock staggers, whereas ergovaline is less frequently documented in perennial ryegrass. Lolitrem B and ergovaline were monitored over a three-year period in endophyte-infected perennial ryegrass 'Samson' sown in southern France. Alkaloid concentrations were strongly influenced by the stage of maturity of the plant; maximum concentrations were always measured at the fully ripe stage. Over the three years of analysis, variations in lolitrem B in the whole plant at the fully ripe stage were low (from 1296 to maximum 1871 μg/kg dry matter), whereas ergovaline varied considerably (from 526 to 2322 μg/kg dry matter), suggesting that abiotic factors play a key role in determining ergovaline levels in endophyte-infected perennial ryegrass.

Keywords: BBCH scale; Samson; climatic factors; ergovaline; fungal endophyte (Epichloë festucae var. lolii); lolitrem B; perennial ryegrass (Lolium perenne); pluviometry; temperatures.

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