Root uptake of inorganic and organic N chemical forms in two coexisting Mediterranean forest trees
Authors
Uscola Fernández, María Mercedes; Villar Salvador, Pedro; Oliet Palá, Juan Antonio; Warren , CharlesIdentifiers
Permanent link (URI): http://hdl.handle.net/10017/37395DOI: 10.1007/s11104-017-3172-6
ISSN: 0032-079X
Date
2017Funders
Ministerio de Educación y Ciencia
Ministerio de Ciencia e Innovación
Ministerio de Economía y Competitividad
Comunidad de Madrid
Bibliographic citation
Plant and Soil, 2017, v. 415, n. 1, p. 387-392
Keywords
Amino acid
Ammonium
Nitrate
Pinus halepensis
Quercus ilex
Root uptake preferences.
Project
info:eu-repo/grantAgreement/MICINN//AGL2011-24296/ES/TOLERANCIA Y ESTRATEGIAS ECOFISIOLÓGICAS DE LOS PINOS IBÉRICOS DURANTE LA FASE JUVENIL EN RESPUESTA AL ESTRÉS HÍDRICO, LAS BAJAS TEMPERATURAS Y LA DISPONIBILIDAD DE NUTRIENTES/ECOLPIN
info:eu-repo/grantAgreement/MINECO//CGL2014-53308-P/ES/SERVICIOS DE LA AVIFAUNA (HIGH MOBILE LINK SPECIES) EN MOSAICOS AGROFORESTALES: REGENERACION FORESTAL Y REGULACION DE PLAGAS/SERAVI
info:eu-repo/grantAgreement/CAM/Programa de Actividades de I+D por Grupos de Investigación Consolidados de la Comunidad de Madrid/S2013%2FMAE-2719/ES/Restauración y conservación de los ecosistemas mediterráneos: respuesta frente al cambio global/REMEDINAL-3
info:eu-repo/grantAgreement/CICYT//AGL2006-12609-C02-01%2FFOR/ES/Optimización de la nutrición de la encina en vivero: bases fisiológicas, técnicas de fertilización e implicaciones post-transplante/ENCINUT
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© 2017 Springer International Publishing
Access rights
info:eu-repo/semantics/openAccess
Abstract
Background and aims Plants differ in their ability to usedifferent nitrogen (N) chemical forms, these differencescan be related to their ecology and drive communitystructure. The capacity to uptake intact organic N hasbeen observed in plants of several ecosystems. However,soil organic N uptake by Mediterranean plants is unknowndespite organic N being abundant inMediterranean ecosystems. We compare the uptake ofdifferent N forms in two widespread coexistingMediterranean forest trees with contrasting ecophysiologicalcharacteristics: Quercus ilex and Pinus halepensis.Methods To estimate root uptake rate of eachN form weused equimolar solutions (1 mM N) of 15NO3-, 15NH4+ and 15N-13C glycine.Results NH4+ and glycine were taken up at a similarrate, but faster than NO3− in both species. Intact duallabeled glycine was found in both species, demonstratingthat both species can absorb intact organic N. Conclusions: Despite their ecological differences, both species had similar preference for N forms suggesting no niche complementarity for N uptake. The higher preference for NH4 +
and glycine over NO3
- possibly reflects adaptation to the differing proportions of N forms in Mediterranean soils.
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