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| DOI: | 10.1094/PHYTO-99-12-1336 |
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| Web URL(s): | http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-99-12-1336
Last checked: 01/25/2010
Requires: PDF Reader |
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| Publication Type:
| Refereed
Report |
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| Author(s): | Bacetty, A. A.;
Snook, M. E.;
Glenn, A. E.;
Noe, J. P.;
Hill, N.;
Culbreath, A.;
Timper, P.;
Nagabhyru, P.;
Bacon, C. W. |
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| Author Affiliation: | Bacetty, Snook, Glenn and Bacon: United States Department of AgricultureāAgricultural Research Service (USDA-ARS), Toxicology and Mycotoxin Research Unit, Ruchard Russell Research Center, Athens, GA; Bacetty, Noe and Culbreath: Department of Plant Pathology; Hill: Department of Crop and Soil Science, University of Georgia, Athens; Timper: USDA-ARS, Crop Protection and Management, Tifton, GA; Nagabhyru: Department of Plant Pathology, University of Kentucky, Lexington |
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| Title: | Toxicity of endophyte-infected tall fescue alkaloids and grass metabolites on Pratylenchus scribneri |
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| Section: | Nematology
Other records with the "Nematology" Section
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| Source: | Phytopathology. Vol. 99, No. 12, December 2009, p. 1336-1345. |
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| Publishing Information: | St. Paul, MN: American Phytopathological Society |
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| # of Pages: | 10 |
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| Related Web URL: | http://apsjournals.apsnet.org/doi/abs/10.1094/PHYTO-99-12-1336
Last checked: 05/24/2010
Notes: Abstract only |
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| Keywords: | TIC Keywords: Festuca arundinacea; Endophytic fungi; Metabolites; Pratylenchus; Acremonium coenophialum
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| Abstract/Contents: | "Neotyphodium coenophialum, an endophytic fungus associated with tall fescue grass, enhances host fitness and imparts pest resistance. This symbiotum is implicated in the reduction of stresses, including plant-parasitic nematodes. To substantiate this implication, toxicological effects of root extracts, polyphenolic fraction, ergot, and loline alkaloids from endophyte-infected tall fescue were investigated using Pratylenchus scribneri, a nematode pest of tall fescue. In vitro bioassays and greenhouse studies were used as tests for effects of root fractions and compounds on motility and mortality of this lesion nematode. Greenhouse studies revealed that endophyte-infected tall fescue grasses are essentially nonhosts to P. scribneri, with root populations averaging 3 to 17 nematodes/pot, compared with 4,866 and 8,450 nematodes/pot for noninfected grasses. The in vitro assay indicated that root extracts from infected tall fescues were nematistatic. Polyphenols identified in extracts included chlorogenic acid, 3,5-dicaffeoylquinic acids, caffeic acid, and two unidentified compounds, but these were not correlated with endophyte status, qualitatively or quantitatively. Tests of several ergot alkaloids revealed that ergovaline and Ī±-ergocryptine were nematicidal at 5 and 50 Ī¼g/ml, respectively, while ergocornine and ergonovine were nematistatic at most concentrations. Loline (N-formylloline), the pyrrolizidine alkaloid tested, was nematicidal (50 to 200 Ī¼g/ml). The ecological benefits of the metabolites tested here should assist in defining their role in deterring this nematode species while offering some probable mechanisms of action against plant-parasitic nematodes in general." |
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| Language: | English |
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| References: | 43 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bacetty, A. A., M. E. Snook, A. E. Glenn, J. P. Noe, N. Hill, A. Culbreath, et al. 2009. Toxicity of endophyte-infected tall fescue alkaloids and grass metabolites on Pratylenchus scribneri. Phytopathology. 99(12):p. 1336-1345. |
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| DOI: 10.1094/PHYTO-99-12-1336 |
| Web URL(s):
http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-99-12-1336
Last checked: 01/25/2010
Requires: PDF Reader |
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MSU catalog number: b2219736a |
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