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Web URL(s): | https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/112400 Last checked: 11/16/2018 Requires: JavaScript |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Petrella, Dominic P.;
Sessoms, Florence;
Trappe, Jon M.;
Watkins, Eric |
Author Affiliation: | Petrella and Watkins: Department of Horticultural Science, University of Minnesota, St. Paul, MN; Sessoms and Trappe: Department of Horticultural Science, University of Missesota-Twin Cities, St. Paul, MN |
Title: | The influence of nitrogen and phosphorus concentrations on the allelopathic effects of Festuca rubra ssp. commutata |
Section: | C05 turfgrass science Other records with the "C05 turfgrass science" Section
Turfgrass science and management: Soil, plant nutrition, and the environment oral Other records with the "Turfgrass science and management: Soil, plant nutrition, and the environment oral" Section
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Meeting Info.: | Baltimore, Maryland: November 4-7, 2018 |
Source: | ASA, CSSA and SSSA International Annual Meetings. 2018, p. 112400. |
Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy] |
# of Pages: | 1 |
Keywords: | TIC Keywords: Allelochemicals; Allelopathy; Festuca rubra subsp. commutata; Nitrogen; Nutrient concentration; Phosphorus
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Abstract/Contents: | "Festuca rubra ssp. commutata (Chewings fescue) has been touted to be a potentially allelopathic turfgrass. Chewings fescue roots accumulate and exude the phytotoxin L-m-tyrosine, a structural isomer of the amino acid L-p-tyrosine. In particular, the Chewings fescue cv. 'Intrigue' has been said to exude large quantities of L-m-tyrosine. However, while this previous research has shown allelopathic potential among the Chewings fescues, direct observations of allelopathy in the field are lacking. The accumulation and exudation of allelochemicals is influenced by abiotic factors, and soil nutrient status has been shown to regulate allelopathy in other grasses. Because concentrations of soil nitrogen (N) and phosphorus (P) can be quite variable in soils, we hypothesized that the status of these two nutrients could be limiting allelopathy among the Chewings fescues. A Petri plate bioassay to monitor root elongation was implemented using Chewings fescue cv. 'Intrigue' plants grown alongside seedlings of a model weed species, Arabidopsis thaliana (ecotype Columbia, Col-0). Modified Hoaglands nutrient solutions were used to manipulate and test the effect of various levels of N and P within the agar. The quantity of L-m-tyrosine in both the agar and the fescue roots was determined using gas chromatography-mass spectrometry (GC-MS). Our results indicate that Arabidopsis seedling root elongation was inhibited to a significantly greater degree when grown alongside Chewings fescue cv. 'Intrigue' relative to being growth alongside additional Arabidopsis plants. This effect was more pronounced with 7.5 and 15 mM nitrogen compared to 3.75 mM, and the addition of 500 μM phosphorus resulted in abnormal gravitropic growth in Arabidopsis roots that was not observed at lower levels of phosphorus. Therefore, these results indicate that nutrient status might play a role in regulating Chewings fescue allelopathy." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! "308-4" |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Petrella, D. P., F. Sessoms, J. M. Trappe, and E. Watkins. 2018. The influence of nitrogen and phosphorus concentrations on the allelopathic effects of Festuca rubra ssp. commutata. Agron. Abr. p. 112400. |
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