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| DOI: | 10.21273/HORTSCI.38.5.759 |
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| Web URL(s): | https://journals.ashs.org/hortsci/view/journals/hortsci/38/5/article-p759.xml
Last checked: 11/19/2019
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Jiang, Zhongchun;
Hull, Richard J.;
Sullivan, W. Michael |
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| Author Affiliation: | Zhongchun: Plant Science, State University of New York, Cobleskill, New York; Hull: Plant Sciences, University of Rhode Island, Kingston, Rhode Island; and Sullivan: Plant Sciences, University of Rhode Island, Kingston, Rhode Island |
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| Title: | Kentucky bluegrass cultivars with higher root sugar content have greater root nitrate assimilation potential |
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| Section: | Workshop 15
Other records with the "Workshop 15" Section
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| Source: | HortScience. Vol. 38, No. 5, August 2003, p. 767-768. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Nitrogen efficiency; Nitrates; Nitrogen fertilization; Nutritional requirements; Poa pratensis; Metabolism; Roots; Glucose
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| Cultivar Names: | Classic; Eclipse; Huntsville; Livingston; Merit |
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| Abstract/Contents: | "Selecting crop varieties that can utilize nitrate efficiently and understanding the mechanisms behind their efficient use of nitrate can help breed new crops that will have lower fertilizer N requirements. The objective of this project was to compare five cultivars of Kentucky bluegrass (Poa pratensis L.), Classic, Eclipse, Huntsville, Livingston, and Merit, for their metabolic characteristics in nitrate assimilation that contribute to efficient N use. Nitrate assimilation potential (NAP) and nitrate reduction rate of leaf blades and roots were analyzed using in vivo methods and sugar contents of roots were analyzed using in vivo methods and sugar contents of roots were analyzed using a sulfuric acid/colorimetric method. Relative growth rate of the whole grass was similar in the five cultivars, regardless of the nitrate concentrations supplied, although the 1.0mM nitrate concentration increased the growth over the 0.1 mM. Merit exhibited a significant difference in relative growth rate between the two nitrate levels. Two days after the initiation of the 1.0mM nitrate treatment, leaf NAP of Merit was significantly greater than NAP of Classic. Nitrate reduction rate showed no significant differences among cultivars, but nitrite absorption rate of the leaf tissues was greater in Eclipse than in Livingston and Merit. Root glucose content was higher in Classic at both nitrate concentrations but Huntsville had glucose content similar to that of Classic at the 1.0 mM nitrate level. Water-soluble sugar content of the roots was positively and significantly correlated with root NAP across the five cultivars, with Classic having the highest sugar content and lowest NAP, Livingston having the lowest sugar content and lowest NAP, and Huntsville having intermediate levels of sugar content and root NAP. This observation indicates that root sugar content significantly affects root nitrate assimilation of Kentucky bluegrass cultivars." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Jiang, Z., R. J. Hull, and W. M. Sullivan. 2003. Kentucky bluegrass cultivars with higher root sugar content have greater root nitrate assimilation potential. HortScience. 38(5):p. 767-768. |
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| DOI: 10.21273/HORTSCI.38.5.759 |
| Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/38/5/article-p759.xml
Last checked: 11/19/2019
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 1 .H64 |
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