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DOI: | 10.1111/j.1469-8137.2006.01960.x |
Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2006.01960.x/full Last checked: 03/12/2012 Access conditions: Item is within a limited-access website http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2006.01960.x/pdf Last checked: 03/12/2012 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Rasmussen, Susanne;
Parsons, Anthony J.;
Bassett, Shalome;
Christensen, Michael J.;
Hume, David E.;
Johnson, Linda J.;
Johnson, Richard D.;
Simpson, Wayne R.;
Stacke, Christina;
Voisey, Christine R.;
Xue, Hong;
Newman, Jonathan A. |
Author Affiliation: | Rasmussen, Parsons, Bassett, Christensen, Hume, L. Johnson, R. Johnson, Simpson, Stacke, Voisey and Xue: AgResearch, Palmerston North, New Zealand; Newman: Department of Environmental Biology, University of Guelph, Ontario, Canada |
Title: | High nitrogen supply and carbohydrate content reduce fungal endophyte and alkaloid concentration in Lolium perenne |
Source: | New Phytologist. Vol. 173, No. 4, March 2007, p. 787-797. |
Publishing Information: | Oxford, England: Blackwell Publishing, for the New Phytologist Trust |
# of Pages: | 11 |
Related Web URL: | http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2006.01960.x/abstract Last checked: 03/12/2012 Notes: Abstract only |
Keywords: | TIC Keywords: Cultivar evaluation; Endophytic fungi; Ergovaline; Festuca arundinacea; Lolitrem; Lolium perenne; Neotyphodium lolii; Nitrogen fertilization; Peramine; Polymerase chain reaction
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Cultivar Names: | AberDove; Fennema |
Abstract/Contents: | "The relationship between cool-season grasses and fungal endophytes is widely regarded as mutualistic, but there is growing uncertainty about whether changes in resource supply and environment benefit both organisms to a similar extent. Here, we infected two perennial ryegrass (Lolium perenne) cultivars (AberDove, Fennema) that differ in carbohydrate content with three strains of Neotyphodium lolii (AR1, AR37, common strain) that differ intrinsically in alkaloid profile. We grew endophyte-free and infected plants under high and low nitrogen (N) supply and used quantitative PCR (qPCR) to estimate endophyte concentrations in harvested leaf tissues. Endophyte concentration was reduced by 40% under high N supply, and by 50% in the higher sugar cultivar. These two effects were additive (together resulting in 75% reduction). Alkaloid production was also reduced under both increased N supply and high sugar cultivar, and for three of the four alkaloids quantified, concentrations were linearly related to endophyte concentration. The results stress the need for wider quantification of fungal endophytes in the grassland-foliar endophyte context, and have implications for how introducing new cultivars, novel endophytes or increasing N inputs affect the role of endophytes in grassland ecosystems." |
Language: | English |
References: | 62 |
Note: | Summary as abstract Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Rasmussen, S., A. J. Parsons, S. Bassett, M. J. Christensen, D. E. Hume, L. J. Johnson, et al. 2007. High nitrogen supply and carbohydrate content reduce fungal endophyte and alkaloid concentration in Lolium perenne. New Phytol. 173(4):p. 787-797. |
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| DOI: 10.1111/j.1469-8137.2006.01960.x |
| Web URL(s): http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2006.01960.x/full Last checked: 03/12/2012 Access conditions: Item is within a limited-access website http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2006.01960.x/pdf Last checked: 03/12/2012 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: b2219226 |
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