Andrews, M. and Lea, Peter John and Raven, J. A. and Lindsey, K. (2004) Can genetic manipulation of plant nitrogen assimilation enzymes result in increased crop yield and greater N-use efficiency? An assessment. Annals of Applied Biology, 145 (1). pp. 25-40. ISSN 0003-4746
Full text not available from this repository.Abstract
The literature on the relations between plant nitrogen (N) assimilation enzymes and plant/crop N assimilation, growth and yield is reviewed to assess if genetic manipulation of the activities of N assimilation enzymes can result in increased yield and/or increased N use efficiency. The available data indicate that (I) levels of N assimilation enzymes do not limit primary N assimilation and hence yield; (II) root or shoot nitrate assimilation can have advantages under specific environmental conditions; (III) for cereals, cytosolic glutamine synthetase (GS1) is a key enzyme in the mobilisation of N from senescing leaves and its activity in senescing leaves is positively related to yield; and (TV) for rice (Oryza sativd), NADH-glutamate synthase (NADH-GOGAT) is important in the utilisation of N in grain filling and its activity in developing grains is positively related to yield. In our opinion, selection of plants, from either a genetically manipulated population or genetic resources, with expression of nitrate reductase/nitrite reductase primarily in the root or shoot should increase plant/crop growth and hence yield under specific environmental conditions. In addition for cereals the selection of plants with high GS1 in senescing leaves and in some cases high NADH-GOGAT in developing grains could help maximise the retrieval of plant N in seeds.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Annals of Applied Biology |
| Uncontrolled Keywords: | Nitrogen assimilation • nitrogen use efficiency • nitrate reductase • nitrite reductase • glutamine synthetase • glutamate synthase • genetic manipulation • crop yield |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Departments: | Faculty of Science and Technology > Lancaster Environment Centre |
| ID Code: | 10656 |
| Deposited By: | Mr Richard Ingham |
| Deposited On: | 21 Jul 2008 16:46 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 14:51 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/10656 |
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