Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies
Discrimination of stable carbon isotopes in leaves is physiologically linked to water-use efficiency. Twenty-eight contrasting rice (Oryza sativa L.) cultivars were grown in the Philippines as upland rice under continuous, mild water stress. In situ measurements of leaf level water-use efficiency (W...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Commonwealth Scientific and Industrial Research Organisation
1991
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/167551 |
| _version_ | 1855520672830193664 |
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| author | Dingkuhn, M. Farquhar, G.D. De Datta, S.K. O'Toole, J.C. Datta, SKde |
| author_browse | Datta, SKde De Datta, S.K. Dingkuhn, M. Farquhar, G.D. O'Toole, J.C. |
| author_facet | Dingkuhn, M. Farquhar, G.D. De Datta, S.K. O'Toole, J.C. Datta, SKde |
| author_sort | Dingkuhn, M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Discrimination of stable carbon isotopes in leaves is physiologically linked to water-use efficiency. Twenty-eight contrasting rice (Oryza sativa L.) cultivars were grown in the Philippines as upland rice under continuous, mild water stress. In situ measurements of leaf level water-use efficiency (WUE), net photosynthesis, conductance, water potential and leaf rolling were reported previously. The present study used leaf samples from the same experiment to determine, by means of a mass spectrometer, the carbon isotope discrimination (-) and total C and N content. Among rice cultivars, - ranged from 19.8 to 21.5960, with japonica types having the lowest mean -, aus types, the greatest, and indica types, intermediate-the opposite pattern to that observed for WUE. Carbon isotope discrimination was negatively correlated with WUE across all cultivars (P < 0.001) and within japonica (P < 0 -01) and aus (P < 0.05) groups, but not among indica rices. No correlation was observed between - and any other measured variable. Varietal differences in - and WUE were not related to leaf N content or stomata1 conductance. High WUE was associated with high leaf C content (P < 0.01), with aus cultivars having the lowest mean WUE and C content among the genetic groups. We conclude that even under variable field conditions, analysis of foliar - is a potential tool to identify water-use efficient rice genotypes. |
| format | Journal Article |
| id | CGSpace167551 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1991 |
| publishDateRange | 1991 |
| publishDateSort | 1991 |
| publisher | Commonwealth Scientific and Industrial Research Organisation |
| publisherStr | Commonwealth Scientific and Industrial Research Organisation |
| record_format | dspace |
| spelling | CGSpace1675512025-12-08T10:29:22Z Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies Dingkuhn, M. Farquhar, G.D. De Datta, S.K. O'Toole, J.C. Datta, SKde arbon upland rice water use efficiency Discrimination of stable carbon isotopes in leaves is physiologically linked to water-use efficiency. Twenty-eight contrasting rice (Oryza sativa L.) cultivars were grown in the Philippines as upland rice under continuous, mild water stress. In situ measurements of leaf level water-use efficiency (WUE), net photosynthesis, conductance, water potential and leaf rolling were reported previously. The present study used leaf samples from the same experiment to determine, by means of a mass spectrometer, the carbon isotope discrimination (-) and total C and N content. Among rice cultivars, - ranged from 19.8 to 21.5960, with japonica types having the lowest mean -, aus types, the greatest, and indica types, intermediate-the opposite pattern to that observed for WUE. Carbon isotope discrimination was negatively correlated with WUE across all cultivars (P < 0.001) and within japonica (P < 0 -01) and aus (P < 0.05) groups, but not among indica rices. No correlation was observed between - and any other measured variable. Varietal differences in - and WUE were not related to leaf N content or stomata1 conductance. High WUE was associated with high leaf C content (P < 0.01), with aus cultivars having the lowest mean WUE and C content among the genetic groups. We conclude that even under variable field conditions, analysis of foliar - is a potential tool to identify water-use efficient rice genotypes. 1991 2024-12-19T12:57:29Z 2024-12-19T12:57:29Z Journal Article https://hdl.handle.net/10568/167551 en Commonwealth Scientific and Industrial Research Organisation Dingkuhn, M; Farquhar, GD; De, Datta SK; O'Toole, JC and Datta, SKde. 1991. Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies. Aust. J. Agric. Res., Volume 42 no. 7 p. 1123 |
| spellingShingle | arbon upland rice water use efficiency Dingkuhn, M. Farquhar, G.D. De Datta, S.K. O'Toole, J.C. Datta, SKde Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies |
| title | Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies |
| title_full | Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies |
| title_fullStr | Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies |
| title_full_unstemmed | Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies |
| title_short | Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies |
| title_sort | discrimination of 13c among upland rices having different water use efficiencies |
| topic | arbon upland rice water use efficiency |
| url | https://hdl.handle.net/10568/167551 |
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