Lolium perenne is a major forage and turf grass, which is often naturally infected with a 'wild-type' strain (EWT) ofthe fungal endophyte Neotyphodium lolii, establishing a symbiotic relationship. In this study, the impacts of different strains wildtype EWT, AR1 (EAR1) and AR37 (EAR37), of N. lolii on the phenolic profile, phenolic content, and antioxidant capacity of L.perenne were examined. Samples could be ranked according to their phenol content as follows: EAR1 > EAR37 ' E' > EWT. Radicalscavengingassays showed the same relative ranking of extracts. Flavonoid glycosides and hydroxycinnamic acids were the mostabundant polyphenols in L. perenne extracts. Chlorogenic acid and its derivatives were the major compounds responsible for theantioxidant activity. Infection with N. lolii significantly influenced L. perenne phenolic content and antioxidant activity. Inconclusion, changes in phenolic composition were merely quantitative. Endophyte infection can have zero, positive, or negativeeffect on phenol content depending on the endophyte strain.
Qawasmeh, A. Q., Obied, H., Raman, A., & Wheatley, W. (2012). Influence of Fungal Endophyte Infection on Phenolic Content and Antioxidant Activity in Grasses: Interaction between Lolium perenne and Different Strains of Neotyphodium lolii. Journal of Agricultural and Food Chemistry, 60(13), 3381-3388. https://doi.org/10.1021/jf204105k