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Web URL(s): | http://archive.lib.msu.edu/tic/golfd/article/2007jul64.pdf Last checked: 06/20/2012 Requires: PDF Reader |
Publication Type:
| Professional |
Author(s): | Hull, Richard J.;
Bushoven, John T. |
Author Affiliation: | Hull: Professor Emeritus, Plant Physiology, Plant Sciences Department, University of Rhode Island, Kingston, Rhode Island, and Adjunct Professor, Horticulture Department, Clemson University, Clemson, South Carolina; Bushoven: Assistant Professor, Horticulture, Department of Plant Science, California State University-Fresno, Fresno, California |
Title: | Recognizing the nitrate effect on root growth and development: NO3- presence in the leaves directs plant resources toward leaf and shoot growth at some expense of root expansion |
Section: | The nitrate effect Other records with the "The nitrate effect" Section
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Source: | TurfGrass TRENDS. July 2007, p. 64-66. |
Publishing Information: | Cleveland, OH: Advanstar Communications |
# of Pages: | 3 |
Keywords: | TIC Keywords: Nitrates; Root growth; Growth factors; Nitrogen use; Nitrogen metabolism
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Abstract/Contents: | Suggests that "a vigorous and healthy root system is critical to maintaining high quality turf." Explains that "perennial ryegrass (Lolium perenne L.) and creeping bentgrass (Agrostis stolonifera L.), like many grasses, transport most of the NO3- absorbed by their roots to the leaves where it is reduced to ammonia (NH3) and assimilated into amino acids. These amino acids can then be transported from the leaves to all parts of the plant, including the roots, where they support cell division and growth." States that "given the anatomy of a grass plant, the transport of sugars and amino acids from leaves must pass through the crown at the soil surface, where leaves are initiated and their growth supported, before they can reach the root tips where root growth occurs. In short, NO3- present in the leaves directs plant resources toward leaf and shoot growth at some expense from root growth. Explains that "ammonium is the only form of nitrogen that can be used by a plant to make amino acids and subsequently proteins, nucleic acids and all other nitrogen-containing compounds." Mentions that "Glutamate Synthase (GOGAT) is the enzyme that catalyzes this reaction and it also is confined to plastids." Concludes that "since most of these reactions occur in chloroplasts...they draw upon the very same photoenergy used to assimilate CO2. Therefore, NO3- metabolism can be viewed as a type of photosynthesis." |
Language: | English |
References: | 6 |
Note: | Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Hull, R. J., and J. T. Bushoven. 2007. Recognizing the nitrate effect on root growth and development: NO3- presence in the leaves directs plant resources toward leaf and shoot growth at some expense of root expansion. TurfGrass Trends. p. 64-66. |
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| Web URL(s): http://archive.lib.msu.edu/tic/golfd/article/2007jul64.pdf Last checked: 06/20/2012 Requires: PDF Reader |
| MSU catalog number: SB 433 .T874 |
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