Seedling nutrient status before submergence affects survival after submergence in rice
Vast rainfed lowland areas in Asia periodically experience flash floods that adversely affect survival and productivity of rice (Oryza sativa L.). Progress has been made in developing more tolerant germplasm, but fewer efforts have been devoted to identifying proper management options. We evaluated...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2006
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/166598 |
| _version_ | 1855521989506105344 |
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| author | Ella, Evangelina S. Ismail, Abdelbagi M. |
| author_browse | Ella, Evangelina S. Ismail, Abdelbagi M. |
| author_facet | Ella, Evangelina S. Ismail, Abdelbagi M. |
| author_sort | Ella, Evangelina S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Vast rainfed lowland areas in Asia periodically experience flash floods that adversely affect survival and productivity of rice (Oryza sativa L.). Progress has been made in developing more tolerant germplasm, but fewer efforts have been devoted to identifying proper management options. We evaluated the effects of nitrogen (N) and phosphorus (P) added before submergence on seedling survival after submergence. Two experiments were conducted using two cultivars, submergence‐tolerant FR13A and intolerant IR42. In the first experiment, N was applied at two different times and, in the second, N and P were used in a fertile and a P‐deficient soil. Seedlings (21‐d‐old) were submerged in concrete tanks for 12 d. Addition of P seems to enhance tolerance of plants grown on P‐deficient soils. Survival of both cultivars decreased substantially in seedlings with high N concentration, with higher survival in FR13A. Leaf N and chlorophyll concentration before submergence were higher in N‐treated seedlings, whereas chlorophyll a/b ratio was lower. In both cultivars, photosynthesis and root–shoot ratio decreased and chlorophyllase activity increased after submergence with increasing N and with higher activity of chlorophyllase in IR42. Survival was negatively correlated with leaf N concentration, but positively correlated with root–shoot ratio and stem starch concentration before submergence and with chlorophyll concentration and chlorophyll a/b ratio after submergence. Crop establishment could therefore be enhanced in areas where untimely flooding is anticipated by avoiding excessive N application. |
| format | Journal Article |
| id | CGSpace166598 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2006 |
| publishDateRange | 2006 |
| publishDateSort | 2006 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1665982024-12-22T05:44:50Z Seedling nutrient status before submergence affects survival after submergence in rice Ella, Evangelina S. Ismail, Abdelbagi M. chlorophyll chlorophyllase enzyme activity flooding tolerance leaves nitrogen fertilizers phosphorus fertilizers photosynthesis plant nutrition plant water relations root shoot ratio submergence survival Vast rainfed lowland areas in Asia periodically experience flash floods that adversely affect survival and productivity of rice (Oryza sativa L.). Progress has been made in developing more tolerant germplasm, but fewer efforts have been devoted to identifying proper management options. We evaluated the effects of nitrogen (N) and phosphorus (P) added before submergence on seedling survival after submergence. Two experiments were conducted using two cultivars, submergence‐tolerant FR13A and intolerant IR42. In the first experiment, N was applied at two different times and, in the second, N and P were used in a fertile and a P‐deficient soil. Seedlings (21‐d‐old) were submerged in concrete tanks for 12 d. Addition of P seems to enhance tolerance of plants grown on P‐deficient soils. Survival of both cultivars decreased substantially in seedlings with high N concentration, with higher survival in FR13A. Leaf N and chlorophyll concentration before submergence were higher in N‐treated seedlings, whereas chlorophyll a/b ratio was lower. In both cultivars, photosynthesis and root–shoot ratio decreased and chlorophyllase activity increased after submergence with increasing N and with higher activity of chlorophyllase in IR42. Survival was negatively correlated with leaf N concentration, but positively correlated with root–shoot ratio and stem starch concentration before submergence and with chlorophyll concentration and chlorophyll a/b ratio after submergence. Crop establishment could therefore be enhanced in areas where untimely flooding is anticipated by avoiding excessive N application. 2006-07 2024-12-19T12:56:27Z 2024-12-19T12:56:27Z Journal Article https://hdl.handle.net/10568/166598 en Wiley Ella, Evangelina S.; Ismail, Abdelbagi M. 2006. Seedling nutrient status before submergence affects survival after submergence in rice. Crop Science, Volume 46 no. 4 p. 1673-1681 |
| spellingShingle | chlorophyll chlorophyllase enzyme activity flooding tolerance leaves nitrogen fertilizers phosphorus fertilizers photosynthesis plant nutrition plant water relations root shoot ratio submergence survival Ella, Evangelina S. Ismail, Abdelbagi M. Seedling nutrient status before submergence affects survival after submergence in rice |
| title | Seedling nutrient status before submergence affects survival after submergence in rice |
| title_full | Seedling nutrient status before submergence affects survival after submergence in rice |
| title_fullStr | Seedling nutrient status before submergence affects survival after submergence in rice |
| title_full_unstemmed | Seedling nutrient status before submergence affects survival after submergence in rice |
| title_short | Seedling nutrient status before submergence affects survival after submergence in rice |
| title_sort | seedling nutrient status before submergence affects survival after submergence in rice |
| topic | chlorophyll chlorophyllase enzyme activity flooding tolerance leaves nitrogen fertilizers phosphorus fertilizers photosynthesis plant nutrition plant water relations root shoot ratio submergence survival |
| url | https://hdl.handle.net/10568/166598 |
| work_keys_str_mv | AT ellaevangelinas seedlingnutrientstatusbeforesubmergenceaffectssurvivalaftersubmergenceinrice AT ismailabdelbagim seedlingnutrientstatusbeforesubmergenceaffectssurvivalaftersubmergenceinrice |