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| Web URL(s): | http://www.blackwell-synergy.com/doi/pdf/10.1046/j.1469-8137.1998.00127.x
Last checked: 02/15/2006
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Faure, Sandrine;
Cliquet, Jean-Bernard;
Thephany, Gaelle;
Boucaud, Jean |
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| Author Affiliation: | UA INRA 950 de Physiologie et Biochimie Végétales, IRBA, Université de Caen, 14032 CAEN Cedex, France |
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| Title: | Nitrogen assimilation in Lolium perenne colonized by the arbuscular mycorrhizal fungus Glomus fasciculatum |
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| Source: | New Phytologist. Vol. 138, No. 3, March 1998, p. 411-417. |
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| Publishing Information: | Oxford, England: Cambridge University Press. |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Lolium perenne; Mycorrhizal fungi; Nitrogen uptake; Enzyme activity; Free amino acids; Interactions; Phosphates; Nitrates; Glomus fasciculatus; Roots; Shoots
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| Abstract/Contents: | "To investigate nitrogen assimilation in Lolium perenne L. colonized by the arbuscular mycorrhizal (AM) fungus Glomus fasciculatum (Thax. sensu Gerd.), nitrate uptake, key enzyme activities, and ]1]5N incorporation into free amino acids were measured. After a 4-h labelling period with []1]5N]nitrate, ]1]5N content was higher in roots and shoots of AM-plants than in those of control plants. Glutamine synthetase (GS) and nitrate reductase (NR) activities were increased in shoots of AM-plants, but not in roots. More label was incorporated into amino acids in shoots of AM plants. Glutamine, glutamate, alanine and γ-aminobutyric acid were the major sinks for ]1]5N in roots and shoots of control and AM plants. Interactions between mycorrhizal colonization, phosphate and nitrate nutrition and NR activity were investigated in plants which received different amounts of phosphate or nitrate. In shoots of control plants, NR activity was not stimulated by high levels of phosphate nutrition but was stimulated by high levels of nitrate. At 4mM nitrate in the nutrient solution, NR activity was similar in control and AM plants. We concluded that mycorrhizal effects on nitrate assimilation are not mediated via improved phosphate nutrition, but could be due to improved nitrogen uptake and translocation." |
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| Language: | English |
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| References: | 30 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Faure, S., J.-B. Cliquet, G. Thephany, and J. Boucaud. 1998. Nitrogen assimilation in Lolium perenne colonized by the arbuscular mycorrhizal fungus Glomus fasciculatum. New Phytol. 138(3):p. 411-417. |
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| Web URL(s):
http://www.blackwell-synergy.com/doi/pdf/10.1046/j.1469-8137.1998.00127.x
Last checked: 02/15/2006
Requires: PDF Reader |
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MSU catalog number: QK 1 .N38 |
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