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| Web URL(s): | https://listings.lib.msu.edu/iowat/1988.pdf#page=91
Last checked: 01/12/2017
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Gleason, M. L.;
Christians, N. C.;
Agnew, M. L. |
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| Author Affiliation: | Assistant Professor, Extension Plant Pathologist, Plant Pathology Department, Iowa State University |
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| Title: | Effect of endophyte infection of perennial ryegrass on growth under drought stress |
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| Source: | 1988 Iowa Turfgrass Research Report. 1988, p. 86-87. |
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| Publishing Information: | Ames, Iowa: Iowa State University Extension |
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| # of Pages: | 2 |
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| Series: | FG-454 |
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| Keywords: | TIC Keywords: Endophytes; Lolium perenne; drought stress
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| Abstract/Contents: | "Cultivars of perennial ryegrass (Lolium perenne) with a high level of infection by an endophytic fungus (Acremonium loliae) have been promoted by seed companies as being resistant to insect feeding and to "environment stress." However, there is a little experimental evidence to support the claim that high-endophyte cultivars perform better under "environmental stress' than low-endophyte cultivars. A project was initiated at Iowa State University in 1986 to evaluate the role of endophyte infection in tolerance to drought stress. A grant from the Iowa Turfgrass Institute supported this research. Populations of endophyte-infected and endophyte-free perennial ryegrass plants for this study were derived from the same clones in order to minimize genetic variability among plants. To obtain endophyte-infected and endophyte-free plants, tillers derived from the same mother plants were potted separately. Half of the tillers were treated with a benomyl drench for eight weeks in order to eliminate the endophyte, while the other half of the tillers received no benomyl. This method produced same-clonal plants with or without endophyte. Plants originally derived from four mother plants were then plotted in sandy loam soil amended with 5 g/l of Osmocote 14-14-14. The experiment was conducted in a greenhouse during fall 1986, using the cultivar Repell, and repeated in spring 1987, using Manhattan IIe. Clones were derived from four mother plants for each experiment. Watering treatments corresponded to wet (-0.4 to -0.6 bars), moist (-2.1 to -2.6 bars), or dry (approximately -16 to -20 bars). Each pot was weighed daily, and watered to saturation when it had dried to a weight corresponding to the bar value of the relevant treatment. After 7-1/2 weeks, plants were washed free of soil, and number of tillers and dry weight of roots, stems, and live and dead blades was measured for all plants. Results are presented in an included table. In Experiment 1, growth of endophyte-free and endophyte-infected plants was not significantly different at any of the soil moisture treatments. In Experiment 2, however, dry weights of endophyte-free plants were significantly higher than the endophyte-infected plants for all moisture treatments. This result suggests that, under the conditions tested, endophyte infection hindered rather than increased growth of Manhattan IIe over a wide range of soil moisture availability. The experiment will be repeated a third time, using the cultivar Manhattan IIe, during summer 1988." |
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| Language: | English |
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| References: | 0 |
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| Note: | "July, 1988"
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gleason, M. L., N. C. Christians, and M. L. Agnew. 1988. Effect of endophyte infection of perennial ryegrass on growth under drought stress. Iowa Turfgrass Res. Rep. p. 86-87. |
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| Web URL(s):
https://listings.lib.msu.edu/iowat/1988.pdf#page=91
Last checked: 01/12/2017
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 I55 |
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