Role of the arbuscular mycorrhizal symbiosis in tolerance response against Armillaria mellea in lavender
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Publication date
2015-08-28ISSN
1695-971X
Abstract
Lavender species form the arbuscular mycorrhizal symbiosis and are at the same time highly susceptible to white root rot. In an attempt to evaluate the response of mycorrhizal Lavandula angustifolia L. to Armillaria mellea (Vahl:Fr) P. Kumm in a greenhouse experiment, plants were previously inoculated with an isolate of the arbuscular mycorrhizal fungus Rhizophagus irregularis (former Glomus intraradices BEG 72) and the influence of the pH growing medium on the plant-symbiont-pathogen interaction was tested
in gnotobiotic autotrophic growth systems in which mycorrhizal inoculum was obtained from root organ cultures. After ten months growth dual-inoculated lavender plants grown in containers with a pasteurized substrate mixture produced a similar number of spikes than healthy plants and achieved equivalent plant diameter coverage. When the growing medium in the autotrophic systems was supplemented with calcium carbonate, the inoculation of lavender plantlets with R. irregularis at higher pH (7.0 and 8.5) media caused a significant decrease of A. mellea presence in plant roots, as detected by qPCR. Moreover, the observation of internal root mycorrhizal infection showed that the extent of mycorrhizal colonization increased in plant roots grown at higher pH, indicating that tolerance to white root rot in lavender plants inoculated with R. irregularis could be associated to mycorrhizal establishment.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
632 - Plant damage, injuries. Plant diseases. Pests, organisms injurious to plants. Plant protection
Pages
8
Publisher
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Is part of
Spanish Journal of Agricultural Research
Citation
Calvet, Cinta, Francesc Garcia-Figueres, Paulo Lovato, and Amelia Camprubi. 2015. "Role Of The Arbuscular Mycorrhizal Symbiosis In Tolerance Response Against Armillaria Mellea In Lavender". Spanish Journal Of Agricultural Research 13 (3): e1008. doi:10.5424/sjar/2015133-7677.
Grant agreement number
MICINN/Programa Nacional de Proyectos de Investigación Fundamental/AGL2010-15017/ES/DESAROLLO BIOTECNOLOGICO DE LOS PROCESOS DE MICORRIZACION Y DE TRAZABILIDAD PARA LA GESTION SOSTENIBLE DE EXPLOTACIONES AGRARIAS Y DE ENTORNOS PAISAJISTICOS/
Program
Protecció Vegetal Sostenible
This item appears in the following Collection(s)
- ARTICLES CIENTÍFICS [2850]
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/