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International Journal of Agronomy
Volume 2011 (2011), Article ID 948605, 7 pages
Research Article

Plant and Endophyte Effect on Fiber, N, and P Concentrations in Tall Fescue

1The Samuel Roberts Noble Foundation, 2510 Sam Noble Parkway, Ardmore, Ok 73401, USA
2Clemson University, 540 E. Main Street, Pendleton, SC 29670, USA

Received 8 February 2011; Accepted 27 March 2011

Academic Editor: Robert J. Kremer

Copyright © 2011 James K. Rogers et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Tall fescue (Lolium arundinaceum) infected with an endophyte (Neotyphodium spp.) generally has agronomic advantages over endophyte-free tall fescue. The objective of this study was to determine if endophyte presence (E+) or absence (E−) in three tall fescue genotypes affects concentrations of acid detergent fiber (ADF), neutral detergent fiber (NDF), nitrogen (N), and phosphorus (P) in field and greenhouse studies. E+ plants had higher concentrations of ADF and NDF (nonsignificant in one genotype) in the field study. Endophyte lowered N concentration in the field from 19.2 to 18.5 g k g 1 . Various interactions between genotype, endophyte, and maturity were significant for NDF, N, and P in both field and greenhouse studies. This interaction occurred because the effect of the endophyte increased or decreased fiber, N, and P content of tall fescue depending upon plant genotype. This genotype by endophyte interaction should be kept in mind as novel endophytes are selected and placed into tall fescue cultivar selections, this interaction could alter fiber, N and P accumulation of the plants which depending upon plant genotype could result in a positive or negative response.