Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/16676
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Plant isotopic composition provides insight into mechanisms underlying growth stimulation by AM fungi in a semiarid environment |
Autor: | Querejeta Mercader, José Ignacio CSIC ORCID; Allen, Michael F.; Alguacil García, María del Mar CSIC ORCID; Roldán Garrigos, Antonio CSIC ORCID | Palabras clave: | Pistacia lentiscus Retama sphaerocarpa δ13C δ15N δ18O |
Fecha de publicación: | 9-mar-2007 | Editor: | Commonwealth Scientific and Industrial Research Organization (Australia) | Citación: | Functional Plant Biology 34(): 683-691 (2007) | Resumen: | We hypothesised that improved plant water status and enhanced transpiration are key mechanisms involved in plant growth stimulation by native arbuscular mycorrhizal fungi (AMF) in semiarid calcareous soils. Seedlings of the dryland shrubs Pistacia lentiscus L. and Retama sphaerocarpa L. were pre-inoculated with a mixture of eight native Glomus spp. fungi, or left un-inoculated, before transplanting into a degraded site in south-eastern Spain. Pre-inoculated Pistacia and Retama shrubs grew faster after transplanting, despite spontaneous colonisation of control plants by local AMF. Pre-inoculation enhanced shoot water content and shoot δ15N in both shrub species. Increased potassium uptake and improved water relations were key mechanisms behind growth stimulation by native AMF in Pistacia. Shoot δ18O (a proxy measure of stomatal conductance) was significantly less negative in AMF-inoculated than in control Pistacia seedlings, indicating enhanced cumulative transpiration in the former. In contrast, shoot δ18O was unaffected by AMF inoculation in Retama, a leafless leguminous shrub with photosynthetic stems. Growth stimulation by native AMF in Retama was attributed to increased phosphorus uptake, enhanced atmospheric nitrogen fixation and a largely nutrient-mediated improvement of plant water status. Shoot δ13C was not significantly influenced by AMF inoculation in either shrub species, thus suggesting roughly parallel upshifts in photosynthetic and transpiration rates which did not affect plant water use efficiency. | Versión del editor: | http://dx.doi.org/10.1071/FP07061 | URI: | http://hdl.handle.net/10261/16676 | DOI: | 10.1071/FP07061 | ISSN: | 1445-4408 |
Aparece en las colecciones: | (CEBAS) Artículos |
Mostrar el registro completo
CORE Recommender
SCOPUSTM
Citations
37
checked on 16-abr-2024
WEB OF SCIENCETM
Citations
36
checked on 25-feb-2024
Page view(s)
367
checked on 17-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.