Architectural root responses of rice to reduced water availability can overcome phosphorus stress

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dc.creatorBauw, P. de
dc.creatorVandamme, Elke
dc.creatorLupembe, A.
dc.creatorMwakasege, L.
dc.creatorSenthilkumar, Kalimuthu
dc.creatorMerckx, Roel
dc.date2019-01
dc.date2019-05-16T19:06:18Z
dc.date2019-05-16T19:06:18Z
dc.date.accessioned2026-06-27T13:18:22Z
dc.descriptionDrought 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.
dc.identifierhttps://hdl.handle.net/10568/101288
dc.identifier.urihttp://hdl.handle.net/123456789/55982
dc.languageen
dc.publisherMDPI
dc.rightsOpen Access
dc.sourceBauw, 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.
dc.subjectphosphorus
dc.subjectwater availability
dc.subjectrice
dc.subjectdrought stress
dc.titleArchitectural root responses of rice to reduced water availability can overcome phosphorus stress
dc.typeJournal Article

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Centro Africano del Arroz (AfricaRice)