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Title

Environmental Maternal Effects Mediate the Resistance of Maritime Pine to Biotic Stress

AuthorsVivas, María; Zas Arregui, Rafael ; Sampedro Pérez, Luis ; Solla, Alejandro
KeywordsEpigenetics
Genetically modified plants
Necrosis
Phylogenetic analysis
Pines
Plant-herbivore interactions
Seedlings
Seeds
Issue Date26-Jul-2013
PublisherPublic Library of Science
CitationPLoS ONE 8(7):1-8 (2013)
AbstractThe resistance to abiotic stress is increasingly recognised as being impacted by maternal effects, given that environmental conditions experienced by parent (mother) trees affect stress tolerance in offspring. We hypothesised that abiotic environmental maternal effects may also mediate the resistance of trees to biotic stress. The influence of maternal environment and maternal genotype and the interaction of these two factors on early resistance of Pinus pinaster half-sibs to the Fusarium circinatum pathogen was studied using 10 mother genotypes clonally replicated in two contrasting environments. Necrosis length of infected seedlings was 16% shorter in seedlings grown from favourable maternal environment seeds than in seedlings grown from unfavourable maternal environment seeds. Damage caused by F. circinatum was mediated by maternal environment and maternal genotype, but not by seed mass. Mechanisms unrelated to seed provisioning, perhaps of epigenetic nature, were probably involved in the transgenerational plasticity of P. pinaster, mediating its resistance to biotic stress. Our findings suggest that the transgenerational resistance of pines due to an abiotic stress may interact with the defensive response of pines to a biotic stress.
Publisher version (URL)http://dx.doi.org/10.1371/journal.pone.0070148
URIhttp://hdl.handle.net/10261/98580
DOI10.1371/journal.pone.0070148
ISSN1932-6203
E-ISSN1932-6203
Appears in Collections:(MBG) Artículos
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