title: Effects of different arbuscular mycorrhizal fungal backgrounds and soils on olive plants growth and water relation properties under well-watered and drought conditions.
abstract: The adaptation capacity of olive trees to different environments is well recognized. However, the presence of microorganisms in the soil is also a key factor in the response of these trees to drought. The objective of the present study was to elucidate the effects of different arbuscular mycorrhizal (AM) fungi coming from diverse soils on olive plant growth and water relations. Olive plants were inoculated with native AM fungal populations from two contrasting environments, that is, semi-arid - Freila (FL) and humid - Grazalema (GZ) regions, and subjected to drought stress. Results showed that plants grew better on GZ soil inoculated with GZ fungi, indicating a preference of AM fungi for their corresponding soil. Furthermore, under these conditions, the highest AM fungal diversity was found. However, the highest root hydraulic conductivity (Lpr) value was achieved by plants inoculated with GZ fungi and growing in FL soil under drought conditions. So, this AM inoculum also functioned in soils from different origins. Nine novel aquaporin genes were also cloned from olive roots. Diverse correlation and association values were found among different aquaporin expressions and abundances and Lpr, indicating how the interaction of different aquaporins may render diverse Lprvalues.
authors.affiliation: Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/Profesor Albareda, Granada, 18008, Spain.|Biochimie et Physiologie Moléculaire des Plantes, SupAgro/INRA UMR 5004. 2, Place Viala, Montpellier, Cedex 2 34060, France.
authors.forename: Monica
authors.initials: M
authors.lastname: Calvo-Polanco
authors.affiliation: Department of Microbiology, University of Granada, Av. Fuentenueva s/n, Granada, 18071, Spain.
authors.forename: Iván
authors.initials: I
authors.lastname: Sánchez-Castro
authors.affiliation: Department of Plant Biotechnology, Instituto de Recursos Naturales y Agrobiología (CSIC), Av. Reina Mercedes, 10, Sevilla, 41012, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Cantos
authors.affiliation: Department of Plant Biotechnology, Instituto de Recursos Naturales y Agrobiología (CSIC), Av. Reina Mercedes, 10, Sevilla, 41012, Spain.
authors.forename: José Luis
authors.initials: JL
authors.lastname: García
authors.affiliation: Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/Profesor Albareda, Granada, 18008, Spain.
authors.forename: Rosario
authors.initials: R
authors.lastname: Azcón
authors.affiliation: Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/Profesor Albareda, Granada, 18008, Spain.
authors.forename: Juan Manuel
authors.initials: JM
authors.lastname: Ruiz-Lozano
authors.affiliation: Department of Cellular Biology, Genetics and Physiology, Campus de Teatinos, University of Málaga, Málaga, 29010, Spain.
authors.forename: Carmen R
authors.initials: CR
authors.lastname: Beuzón
authors.affiliation: Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (CSIC), C/Profesor Albareda, Granada, 18008, Spain. raroca@eez.csic.es.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Aroca
mesh_terms: D020346:Aquaporins / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D003681:Dehydration; D055864:Droughts; D038821:Mycorrhizae / Q000378:metabolism / Q000502:physiology*; D031658:Olea / Q000235:genetics / Q000382:microbiology* / Q000502:physiology; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D032107:Populus / Q000235:genetics / Q000382:microbiology / Q000502:physiology; D012988:Soil Microbiology; D013312:Stress, Physiological; D014867:Water / Q000378:metabolism*
chemical_list: D020346:Aquaporins; D010940:Plant Proteins; D014867:Water
keywords: Olea europaea; aquaporins; arbuscular mycorrhizal fungi; root hydraulic conductivity