Ladha, J.K. and Kirk, G.J.D. and Bennett, J. and Peng, S. and Reddy, C.K. and Reddy, P.M. and Singh, U. (1998) Opportunities for increased nitrogen-use efficiency from improved lowland rice germplasm. Field Crops Research, 56 (1-2). pp. 41-71.
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Abstract
Understanding of the mechanisms governing the efficient use of N by rice plants—both its acquisition and internal use—is reviewed. Acquisition efficiency is considered in terms of root properties influencing the absorption and assimilation of NH+4 and other N species, and their regulation; root-induced changes in the rhizosphere affecting N mineralization, transformation and transport; and root-associated biological N2 fixation. Efficiency of internal use is considered in terms of the translocation, distribution and remobilization of absorbed N in different plant organs, flag leaf N import/export and leaf senescence patterns, and the efficiency with which N is used in CO2 fixation. Evidence for genetic variation in both acquisition efficiency and internal-use efficiency is given for plants under N-sufficient and N-limited conditions. The possibility of incorporating in rice the machinery for N2 fixation is discussed.
| Item Type: | Article |
|---|---|
| Author Affiliation: | International Rice Research Institute, P.O. Box 933, 1099, Manila, Philippines |
| Subjects: | Crop Improvement Crop Improvement > Seed Technology |
| Divisions: | Other Crops |
| Depositing User: | Sandhya Gir |
| Date Deposited: | 02 May 2011 05:44 |
| Last Modified: | 02 May 2011 05:44 |
| Official URL: | http://dx.doi.org/10.1016/S0378-4290(97)00123-8 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/1940 |
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