Architectural root responses of rice to reduced water availability can overcome phosphorus stress
Drought and low phosphorus (P) availability are major limitations for rainfed rice production. Crop roots are important for soil resource acquisition and tolerance to P and water limitations. Two pot and two field trials were conducted to evaluate architectural root responses of contrasting rice var...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
MDPI
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/101288 |
| _version_ | 1855524109881966592 |
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| author | Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Merckx, Roel |
| author_browse | Bauw, P. de Lupembe, A. Merckx, Roel Mwakasege, L. Senthilkumar, Kalimuthu Vandamme, Elke |
| author_facet | Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Merckx, Roel |
| author_sort | Bauw, P. de |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Drought and low phosphorus (P) availability are major limitations for rainfed rice production. Crop roots are important for soil resource acquisition and tolerance to P and water limitations. Two pot and two field trials were conducted to evaluate architectural root responses of contrasting rice varieties to combinations of different levels of P (deficient to non-limiting) and water availability (water stressed to submergence) and to identify the interactions with different varieties. Root development was then related to drought and/or low P tolerance. Although shoot and root growth responded more to P than to water availability, architectural root responses to water were much more prominent than responses to P availability. Reduced water availability decreased nodal thickness and increased secondary root branching, both factors partially enhancing P uptake efficiency and even overcoming a decreased root:shoot ratio under reduced water availability. In contrast to root thickness and secondary branching, basal lateral root density was strongly determined by variety and was related to enhanced P uptake. Reduced water availability induces root modifications whichapart from enhancing drought resiliencealso affect P uptake efficiency. Future research on rice roots and nutrient uptake may hence take into account the large effects of water on root development. |
| format | Journal Article |
| id | CGSpace101288 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1012882025-03-13T09:46:21Z Architectural root responses of rice to reduced water availability can overcome phosphorus stress Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Merckx, Roel phosphorus water availability rice drought stress Drought and low phosphorus (P) availability are major limitations for rainfed rice production. Crop roots are important for soil resource acquisition and tolerance to P and water limitations. Two pot and two field trials were conducted to evaluate architectural root responses of contrasting rice varieties to combinations of different levels of P (deficient to non-limiting) and water availability (water stressed to submergence) and to identify the interactions with different varieties. Root development was then related to drought and/or low P tolerance. Although shoot and root growth responded more to P than to water availability, architectural root responses to water were much more prominent than responses to P availability. Reduced water availability decreased nodal thickness and increased secondary root branching, both factors partially enhancing P uptake efficiency and even overcoming a decreased root:shoot ratio under reduced water availability. In contrast to root thickness and secondary branching, basal lateral root density was strongly determined by variety and was related to enhanced P uptake. Reduced water availability induces root modifications whichapart from enhancing drought resiliencealso affect P uptake efficiency. Future research on rice roots and nutrient uptake may hence take into account the large effects of water on root development. 2019-01 2019-05-16T19:06:18Z 2019-05-16T19:06:18Z Journal Article https://hdl.handle.net/10568/101288 en Open Access MDPI Bauw, P.D.; Vandamme, E.; Lupembe, A.; Mwakasege, L.; Senthilkumar, K.; Merckx, R. 2019. Architectural root responses of rice to reduced water availability can overcome phosphorus stress. Agronomy. ISSN 2073-4395. 9:1. 11 p. |
| spellingShingle | phosphorus water availability rice drought stress Bauw, P. de Vandamme, Elke Lupembe, A. Mwakasege, L. Senthilkumar, Kalimuthu Merckx, Roel Architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| title | Architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| title_full | Architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| title_fullStr | Architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| title_full_unstemmed | Architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| title_short | Architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| title_sort | architectural root responses of rice to reduced water availability can overcome phosphorus stress |
| topic | phosphorus water availability rice drought stress |
| url | https://hdl.handle.net/10568/101288 |
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