Anatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities

Vista sencilla de ítem
dc.creatorBauw, P. de
dc.creatorVandamme, Elke
dc.creatorLupembe, A.
dc.creatorMwakasege, L.
dc.creatorSenthilkumar, Kalimuthu
dc.creatorDrame, K.N.
dc.creatorMerckx, Roel
dc.date2019
dc.date2019-12-09T22:23:46Z
dc.date2019-12-09T22:23:46Z
dc.date.accessioned2026-06-27T13:18:12Z
dc.descriptionDrought 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.
dc.identifierhttps://hdl.handle.net/10568/106084
dc.identifier.urihttp://hdl.handle.net/123456789/55899
dc.languageen
dc.publisherCommonwealth Scientific and Industrial Research Organisation
dc.rightsLimited Access
dc.sourceBauw, 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
dc.subjectdrought stress
dc.subjectblood vessels
dc.subjectgrowth factors
dc.subjectphosphorus
dc.subjectroots
dc.subjectrice
dc.titleAnatomical root responses of rice to combined phosphorus and water stress - relations to tolerance and breeding opportunities
dc.typeJournal Article

Archivos

Colecciones

Centro Africano del Arroz (AfricaRice)