ISSN:
1573-5036
Keywords:
ammonium
;
glutamate dehydrogenase
;
glutamate synthase
;
glutamine synthetase
;
Lotus
;
tobacco
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract In this article we discuss the ways in which our understanding of the nature of the molecular controls of nitrogen assimilation have been increased by the use of leguminous and non-leguminous plants with modified capacities for ammonium assimilation. These modifications have been achieved through genetic engineering and breeding. An improved understanding of nitrogen assimilation will be vital if improvements in crop nitrogen use efficiency are to be made to reduce the need for excessive input of fertilisers. In this review we present an overall view of past work and more recent studies on this topic. In our work, using tobacco and Lotus as model plants, glutamine synthetase and glutamate synthase activites have been altered by stimulating or inhibiting in an organ- or tissue-specific manner the expression of the corresponding genes. The physiological impact of these genetic manipulations has been studied on plants grown under different nitrogen regimes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1004715720043
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