Root morphology and phosphorus uptake by potato cultivars grown under deficient and sufficient phosphorus supply

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorFernandes, Adalton M.
dc.creatorSoratto, Rogerio P.
dc.creatorGonsales, Jaqueline R.
dc.date2015-11-03T15:29:56Z
dc.date2016-10-25T21:17:23Z
dc.date2015-11-03T15:29:56Z
dc.date2016-10-25T21:17:23Z
dc.date2014-12-17
dc.date.accessioned2017-04-06T09:18:30Z
dc.date.available2017-04-06T09:18:30Z
dc.identifierScientia Horticulturae. Amsterdam: Elsevier Science Bv, v. 180, p. 190-198, 2014.
dc.identifier0304-4238
dc.identifierhttp://hdl.handle.net/11449/130174
dc.identifierhttp://acervodigital.unesp.br/handle/11449/130174
dc.identifierhttp://dx.doi.org/10.1016/j.scienta.2014.10.035
dc.identifierWOS:000348887800025
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0304423814005846
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/940721
dc.descriptionInformation regarding the characteristics that affect P-uptake capacity may assist in the selection of more adapted potato (Solanum tuberosum L.) cultivars and more adequate fertilization management for each cultivar. This study evaluated the P-uptake capacity of potato cultivars (Agata, Asterix, Atlantic, Markies, and Mondial) grown under P-deficient (2 mg L-1) or P-sufficient (31 mg L-1) conditions in nutrient solution and related it to physiological parameters of uptake and morphological root characteristics. When the plants were 24 days old, they were subjected to a P-uptake kinetics study. The length and surface area of roots and the uptake kinetic parameters (I-max, K-m, and C-min) varied among potato cultivars. Phosphorus-deficient potato plants had an approximately 60% smaller root surface area and an increase of 86% in the I-max and net P influx compared with the plants in P-sufficient conditions. However, these modifications in P uptake kinetics can do not influence P acquisition in the soil environment due to very limited P diffusion. The amount of P accumulated by plants grown under P-deficient conditions was directly related to the root length and surface area; a greater root surface, as demonstrated by the Asterix cultivar, is the most important factor for achieving a greater P-uptake capacity. Under P-sufficient conditions, potato cultivars such as Markies and Mondial showed a balance between morphological root characteristics (medium/large length and surface area) and physiological parameters (medium/high I-max values and net P influx) and had a greater P-uptake capacity. However, under field conditions, the responses to P deficiency may be different due to the very limited diffusion of P in the soil and because plants can use additional mechanisms to improve their P uptake from the soil. (C) 2014 Elsevier B.V. All rights reserved.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherElsevier B.V.
dc.relationScientia Horticulturae
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectSolanum tuberosum
dc.subjectUptake kinetics
dc.subjectMineral nutrition
dc.subjectRoot length
dc.subjectRoot surface area
dc.subjectPhosphorus uptake efficiency
dc.titleRoot morphology and phosphorus uptake by potato cultivars grown under deficient and sufficient phosphorus supply
dc.typeOtro


Este ítem pertenece a la siguiente institución