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| Web URL(s): | https://scisoc.confex.com/crops/2015am/webprogram/Paper93163.html
Last checked: 11/06/2015 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Heineck, Garett Carl;
Watkins, Eric;
Orshinsky, Angela;
Ehlke, Nancy Jo |
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| Author Affiliation: | Orshinsky: Plant Pathology; Ehlke: Department of Agronomy and Plant Genetics; Heineck and Watkins: University of Minnesota, St. Paul, MN |
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| Title: | Finding benefit in endophytes to mitigate the effects of freezing stress in perennial ryegrass |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Graduate student oral competition: Turfgrass breeding and genetics, stress tolerance
Other records with the "Graduate student oral competition: Turfgrass breeding and genetics, stress tolerance" Section
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| Meeting Info.: | Minneapolis, Minnesota: November 15-18, 2015 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2015, p. 93163. |
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| Publishing Information: | [Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Cold resistance; Comparisons; Endophytes; Epichloe festucae; Hosts of plant pests; Lolium perenne; Mutualism; Stress factors; Winterkill
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| Abstract/Contents: | "The fungal endophyte Epichloe festucae var. lolii has a mutualistic relationship with perennial ryegrass (Lolium perenne) that enhances the survival of the host. If a grass stand has a high percentage of plants infected with endophytes the result can be a decrease in several abiotic and biotic stresses. Perennial ryegrass grown in northern climates often suffers from winterkill, which can completely destroy stands in severe years. This problem has been difficult to remedy through traditional breeding. Research has shown that endophyte interactions can differ based on abiotic stresses present in the area they coexist with their host. Therefore, it is hypothesized that endophytes would reduce freezing stress if plants infected with endophytes evolved in areas where severe freezing temperatures are common. To test this hypothesis seven diverse accessions with varying freezing tolerances were selected. Plants were tested for endophyte infection and populations were then created with and without endophytes. The effect of the endophytes within each of the accessions was determined on a population basis. Comparisons between endophyte infected (E+) and non-infected (E-) populations determined if the endophyte had an effect on the freezing tolerance of the perennial ryegrass accessions. Freezing tolerance was determined by the population's lethal temperature 50 (LT50). Each E+ and E- population within each accession contained 10 genotypes. The genotypes were then cloned to fulfill four reps of each temperature treatment in the freezing test. Six different temperature treatments ranging from -10°C to -20°C encompassed 100% survival to 100% death for all populations respectively. Results show that the endophytes effect on freezing tolerance varies greatly between accessions. Endophyte infection had a favorable effect on four of the accessions, unfavorable effect on one accession and no effect on two of the accessions. There was no correlation between the overall freezing tolerance of the accession and the effect of the endophyte." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"85-7" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Heineck, G. C., E. Watkins, A. Orshinsky, and N. J. Ehlke. 2015. Finding benefit in endophytes to mitigate the effects of freezing stress in perennial ryegrass. Agron. Abr. p. 93163. |
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Last checked: 11/06/2015 |
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