Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities
Drought and low P availability are major limitations for rainfed rice (Oryza spp.) production. Root anatomy plays a key role in resource acquisition and tolerance to P and water limitations. Root anatomical responses of three contrasting rice varieties to combinations of different levels of P (defic...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Commonwealth Scientific and Industrial Research Organisation
2019
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/106084 |
| _version_ | 1855520723391479808 |
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| author | Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Drame, K.N. Merckx, Roel |
| author_browse | Bauw, P. de Drame, K.N. Lupembe, A. Merckx, Roel Mwakasege, L. Senthilkumar, Kalimuthu Vandamme, Elke |
| author_facet | Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Drame, K.N. Merckx, Roel |
| author_sort | Bauw, P. de |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Drought and low P availability are major limitations for rainfed rice (Oryza spp.) production. Root anatomy plays a key role in resource acquisition and tolerance to P and water limitations. Root anatomical responses of three contrasting rice varieties to combinations of different levels of P (deficient to non-limiting) and water availability (water stress to submergence) were evaluated in two pot trials. P availability was the dominant growth-limiting factor, but anatomical root responses to water availability were more prominent than responses to P availability. Cortical cell file number and number of xylem vessels decreased as a response to water stress, but stele and xylem diameter increased. Low P availability induced thinner xylem vessels and a thinner stele. Drought tolerance related to an overall thicker root stele, thicker xylem vessels and a larger water conductance. Some root traits were observed to be more responsive to water and P availability, whereas other traits were more robust to these environmental factors but highly determined by variety. The observed genotypic variation in root anatomy provides opportunities for trait-based breeding. The plasticity of several traits to multiple environmental factors highlights the need for strategic trait selection or breeding adapted to specific target environments. |
| format | Journal Article |
| id | CGSpace106084 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Commonwealth Scientific and Industrial Research Organisation |
| publisherStr | Commonwealth Scientific and Industrial Research Organisation |
| record_format | dspace |
| spelling | CGSpace1060842025-12-08T10:29:22Z Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Drame, K.N. Merckx, Roel drought stress blood vessels growth factors phosphorus roots rice Drought and low P availability are major limitations for rainfed rice (Oryza spp.) production. Root anatomy plays a key role in resource acquisition and tolerance to P and water limitations. Root anatomical responses of three contrasting rice varieties to combinations of different levels of P (deficient to non-limiting) and water availability (water stress to submergence) were evaluated in two pot trials. P availability was the dominant growth-limiting factor, but anatomical root responses to water availability were more prominent than responses to P availability. Cortical cell file number and number of xylem vessels decreased as a response to water stress, but stele and xylem diameter increased. Low P availability induced thinner xylem vessels and a thinner stele. Drought tolerance related to an overall thicker root stele, thicker xylem vessels and a larger water conductance. Some root traits were observed to be more responsive to water and P availability, whereas other traits were more robust to these environmental factors but highly determined by variety. The observed genotypic variation in root anatomy provides opportunities for trait-based breeding. The plasticity of several traits to multiple environmental factors highlights the need for strategic trait selection or breeding adapted to specific target environments. 2019 2019-12-09T22:23:46Z 2019-12-09T22:23:46Z Journal Article https://hdl.handle.net/10568/106084 en Limited Access Commonwealth Scientific and Industrial Research Organisation Bauw, P. D.; Vandamme, E.; Lupembe, A.; Mwakasege, L.; Senthilkumar, K.; Dramé, K. N.; Merckx, R. 2019. Anatomical root responses of rice to combined phosphorus and water stress – relations to tolerance and breeding opportunities. Functional Plant Biology. ISSN: 1445-4408. 46(11). 1009-1022 |
| spellingShingle | drought stress blood vessels growth factors phosphorus roots rice Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Drame, K.N. Merckx, Roel Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities |
| title | Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities |
| title_full | Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities |
| title_fullStr | Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities |
| title_full_unstemmed | Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities |
| title_short | Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities |
| title_sort | anatomical root responses of rice to combined phosphorus and water stress relations to tolerance and breeding opportunities |
| topic | drought stress blood vessels growth factors phosphorus roots rice |
| url | https://hdl.handle.net/10568/106084 |
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