Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 September 1985
Published in Agron J 77:796-798 (1985)
© 1985 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Amino Acid Composition of Tall Fescue Seed Produced from Fungal Endophyte (Acremonium coenophialum()-Free and Infected Plants1

D. P. Belesky, J. J. Evans and S. R. Wilkinson2

The presence of a fungal endophyte (Acremonium coenophialum Morgan-Jones and Gams) in tall fescue (Festuca arundinacea Shreb.) has been associated with the production of nitrogenous secondary metabolites such as the pyrrolizidine alkaloids. The increased production of secondary metabolites may alter the N balance of the plant affecting the types aid amounts of nitrogenous products available for export to developing seed. An investigation was conducted to determine the impact of fungal endophyte status on the amino acid composition of tall fescue seed. New (viable endophyte) and old (stored for at least 2 yr, nonviable endophyte) seed of ‘Kenhy’, ‘KY-31’, an experimental line "EXP" and ‘Fawn’ were sown in a randomized block design. New seed of Fawn failed to germinate. Seed sown, vegetative tissue, and seed produced were assayed for fungal endophyte status. Endophyte levels in vegetative tissue and seed produced from plants established from old seed were low in fungal endophyte (<20%). Qualitative evaluation of seed amino composition (grams amino acid per 100 grams amino acid recovered) did not reveal any significant alterations in amino acid composition, which could be attributable to fungal endophyte status of the parent plant.

Key Words: Fungal endophyte • nitrogenous metabolites • Festuca arundinacea Shreb.

1 Contribution from USDA-ARS, Southern Piedmont Conserv. Res. Center, Watkinsville, GA 30677 and Russell Res. Center, Athens, GA 30613.

2 Research agronomist, Watkinsville, GA 30677; research chemist, Athens, GA 30613; and soil scientist, Watkinsville, GA 30677, respectively.

Received for publication June 29, 1984.




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Copyright © 1985 by the American Society of Agronomy.