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| Web URL(s): | https://archive.lib.msu.edu/tic/its/articles/2001jou245.pdf
Last checked: 09/29/2008
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| Publication Type:
| Refereed |
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| Author(s): | Bushoven, J. T.;
Hull, R. J. |
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| Author Affiliation: | Department of Plant Sciences, University of Rhode Island, Kingston, Rhode Island |
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| Title: | Nitrogen use efficiency is linked to nitrate reductase activity and biomass partitioning between roots and shoots of perennial ryegrass and creeping bentgrass |
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| Section: | Physiology
Other records with the "Physiology" Section
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| Meeting Info.: | Toronto, Ontario, Canada: July 2001 |
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| Source: | International Turfgrass Society Research Journal. Vol. 9, No. Part 1, 2001, p. 245-252. |
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| Publishing Information: | Oakville, Ontario, Canada: International Turfgrass Society |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Biomass; Nitrogen; Nitrification; Nitrate reductase; Biomass determination; Root growth; Shoot growth; Lolium perenne; Agrostis stolonifera; Water pollution; Leaching; Surface runoff; National Turfgrass Evaluation Program; Cultivar evaluation; Nitrogen uptake; Cool season turfgrasses
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| Abstract/Contents: | "Reports that nitrate contamination of groundwater and surface water bodies may result from fertilizer leaching and runoff have increased concerns about the nitrogen use efficiency of turfgrasses. The objectives of this study were to establish the relationship between the partitioning of nitrate assimilation and plant biomass between roots and shoots and to establish if these factors contribute to nitrogen use efficiency in cool season turfgrasses. Nine cultivars each of perennial ryegrass (Lolium perenne L.) and creeping bentgrass (Agrostis palustris Huds.) were selected to encompass a range of performance scores in the National Turfgrass Evaluation Program. Cultures of both species were maintained in aerated nutrient solutions and analyzed for nitrate uptake rate, biomass partitioning, nitrate reductase activity, tissue nitrogen content, and nitrogen use efficiency A positive relationship was observed between the partitioning of nitrate reduction and biomass to roots in perennial ryegrass (r=0.67) and creeping bentgrass (r=0.14). A positive correlation between nitrate uptake and nitrate use efficiency also was observed in creeping bentgrass (r=0.45) but not in perennial ryegrass (r=-57). A negative relationship was observed between the nitrate reductase activity of tissues and the nitrogen use efficiency of those tissues with the exception of perennial ryegrass roots. These data are consistent with the basic hypothesis that the concentration of nitrate assimilation in turfgrass roots positively correlates with greater biomass allocation to their roots, which then enables turfgrasses to acquire nutrients and water more effectively. These results suggest that selection and breeding of cultivars, which concentrate nitrate assimilation in the roots, will lead to an increase in the nitrogen use efficiency of cool-season turfgrasses." |
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| Language: | English |
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| References: | 46 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bushoven, J. T., and R. J. Hull. 2001. Nitrogen use efficiency is linked to nitrate reductase activity and biomass partitioning between roots and shoots of perennial ryegrass and creeping bentgrass. Int. Turfgrass Soc. Res. J. 9(Part 1):p. 245-252. |
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| Web URL(s):
https://archive.lib.msu.edu/tic/its/articles/2001jou245.pdf
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MSU catalog number: SB 433 .I52 v. 9 |
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