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| Web URL(s): | http://aem.asm.org/cgi/reprint/58/3/857
Last checked: 05/30/2007
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Arechavaleta, M.;
Bacon, C. W.;
Plattner, R. D.;
Hoveland, C. S.;
Radcliffe, D. E. |
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| Author Affiliation: | Arechavaleta, Hoveland, and Radcliffe: Department of Agronomy, University of Georgia, Athens, Georgia; Bacon: Toxicology and Mycotoxin Research Unit, Richard B. Russell Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, Georgia; Plattner: Bioactive Constituents Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, United States Department of Agriculture, Peoria, Illinois |
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| Title: | Accumulation of ergopeptide alkaloids in symbiotic tall fescue grown under deficits of soil water and nitrogen fertilizer |
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| Source: | Applied and Environmental Microbiology. Vol. 58, No. 3, March 1992, p. 857-861. |
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| Publishing Information: | Washington, D.C.: American Society for Microbiology |
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| # of Pages: | 5 |
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| Keywords: | TIC Keywords: Festuca arundinacea; Soil water; Nitrogen fertilization; Acremonium coenophialum; Symbiosis; Ergot alkaloids; Ergovaline; Flooding; Water stress; Fertilization rates
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| Abstract/Contents: | "The fungus Acremonium coenophialum is endophytically associated with tall fescue (Festuca arundinacea Schreber). Within this symbiotum the fungus produces ergopeptide alkaloids, which are associated with livestock toxicoses. Environmental effects on the production of ergot alkaloids within the symbiotum are unknown. We conducted a greenhouse study of the effects of flooding, nitrogen rate during fertilization (11, 73, and 220 mg of N per pot weekly), nitrogen form (3.4 and 34 mg of N as NH4+ or NO3- per pot), and drought stress (-0.03, -0.05, and -0.50 MPa) on ergopeptide alkaloid concentrations in one genotype of nonsymbiotic and symbiotic tall fescue grown in plastic pots. It was determined that the concentration of ergovaline, the major type of ergopeptide alkaloid, was increased but was not as high as that in nonflooded controls. Total ergopeptide and ergovaline concentrations in plants receiving high (220 mg of N per pot) and low (11 mg of N per pot) levels of NH4NO3 fertilization were not affected by flooding. The form of nitrogen was important since all concentrations of NO3--N increased ergopeptide alkaloid content, as opposed to the effects of NH4+-N which was effective only at high concentrations (34 mg of N per pot). Ergopeptide concentrations were highest in drought-stressed plants grown at -0.50 MPa and fertilized at the moderate or high N rate. The results suggest that within this genotype, ergopeptide alkaloid biosynthesis by the fungus is not appreciably affected by flooding but is greatly increased by high rates of N fertilization and moderate water deficit." |
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| Language: | English |
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| References: | 30 |
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| Note: | Graphs
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Arechavaleta, M., C. W. Bacon, R. D. Plattner, C. S. Hoveland, and D. E. Radcliffe. 1992. Accumulation of ergopeptide alkaloids in symbiotic tall fescue grown under deficits of soil water and nitrogen fertilizer. Appl. Environ. Microbiol. 58(3):p. 857-861. |
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| Web URL(s):
http://aem.asm.org/cgi/reprint/58/3/857
Last checked: 05/30/2007
Access conditions: Item is within a limited-access website |
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MSU catalog number: QR 1 .A6 |
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