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| Web URL(s): | https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/112087
Last checked: 11/16/2018
Requires: JavaScript |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Sessoms, Florence;
Petrella, Dominic P.;
Horgan, Brian;
Venterea, Rodney;
Watkins, Eric |
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| Author Affiliation: | Sessoms, Petrella, Horgan, and Watkins: Department of Horticultural Science, University of Minnesota, St. Paul, MN; Venterea: USDA, ARS, St. Paul, MN |
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| Title: | Examination of biological nitrification inhibition by a fine fescue root exudate |
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| 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 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2018, p. 112087. |
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| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Chemical properties of soil; Evaluations; Fine fescues; Nitrate losses; Nitrification inhibitors; Nitrogen; Nitrogen losses
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| Abstract/Contents: | "Nitrogen loss due to nitrate leaching is a problem in many fertilized turfgrass landscapes, and innovative solutions to overcome this challenge are needed. One approach is to use perennial grasses that naturally inhibit nitrification. Biological nitrification inhibition (BNI) is the ability of plant-secreted root exudates to decrease soil nitrification rates and the loss of nitrogen. This occurs due to inhibition of nitrifying bacteria by semi-specific root exuded metabolites. BNI has been previously described in pasture grasses and various cereal crops but never in perennial turfgrass species. Of particular interest are the reduced input turfgrasses including the fine fescues (Festuca sp.), which require lower levels of nitrogen for maintaining improved turfgrass quality. Additionally, Chewings fescue (Festuca rubra ssp. commutata) and strong creeping red fescue (F. rubra ssp. rubra) produce and exude L-m-tyrosine, a known allelochemical, into the rhizosphere. This non-proteogenic amino acid impacts root development of weedy species, and has been shown to reduce bacterial growth. The objective of this research was to determine if Chewings fescue and strong creeping red fescue have the ability to inhibit nitrification due to the biosynthesis of L-m-tyrosine. We tested the potential nitrification inhibition of L-m-tyrosine in a nitrification rate experiment following a modified protocol in which dried soil from St. Paul MN was mixed with a solution containing a phosphate buffer, 1 mM of ammonium sulfate and two concentrations of L-m-tyrosine, 0 and 100 μM, to make a soil slurry. Extractable ammonium and total nitrogen were measured at 12 h and 24 h after addition of L-m-tyrosine. We observed that total nitrogen was significantly lower in the L-m-tyrosine treated soil when compared to the untreated control after 24 h. This bioassay was successfully repeated, and the results suggests that L-m-tyrosine is a putative nitrification inhibitor." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"308-6" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Sessoms, F., D. P. Petrella, B. Horgan, R. Venterea, and E. Watkins. 2018. Examination of biological nitrification inhibition by a fine fescue root exudate. Agron. Abr. p. 112087. |
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Last checked: 11/16/2018
Requires: JavaScript |
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