Examinando por Autor "Fernie, Alisdair R."

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    Deciphering the metabolic pathways influencing heat and cold responses during post-harvest physiology of peach fruit
    (Wiley, 2014-01-21) Lauxmann, Martín Alexander; Borsani, Julia; Osorio, Sonia; Lombardo, Verónica Andrea; Budde, Claudio O.; Bustamante, Claudia Anabel; Monti, Laura Lucía; Andreo, Carlos Santiago; Fernie, Alisdair R.; Drincovich, María Fabiana; Lara, María Valeria
    Peaches are highly perishable and deteriorate quickly at ambient temperature. Cold storage is commonly used to prevent fruit decay; however, it affects fruit quality causing physiological disorders collectively termed ‘chilling injury’ (CI). To prevent or ameliorate CI, heat treatment is often applied prior to cold storage. In the present work, metabolic profiling was performed to determine the metabolic dynamics associated with the induction of acquired CI tolerance in response to heat shock. ‘Dixiland’ peach fruits exposed to 39 °C, cold stored, or after a combined treatment of heat and cold, were compared with fruits ripening at 20 °C. Dramatic changes in the levels of compatible solutes such as galactinol and raffinose were observed, while amino acid precursors of the phenylpropanoid pathway were also modified due to the stress treatments, as was the polyamine putrescine. The observed responses towards temperature stress in peaches are composed of both common and specific response mechanisms to heat and cold, but also of more general adaptive responses that confer strategic advantages in adverse conditions such as biotic stresses. The identification of such key metabolites, which prime the fruit to cope with different stress situations, will likely greatly accelerate the design and the improvement of plant breeding programs.
  • Miniatura
    ÍtemAcceso Abierto
    Differential metabolic rearrangements after cold storage are correlated with chilling injury resistance of peach fruits
    (Frontiers Media, 2016-09-30) Bustamante, Claudia Anabel; Monti, Laura Lucía; Gabilondo, Julieta; Scossa, Federico; Budde, Claudio O.; Lara, María Valeria; Fernie, Alisdair R.; Drincovich, María Fabiana
  • Miniatura
    ÍtemAcceso Abierto
    Unravelling early events in the Taphrina deformans–Prunus persica interaction: an insight into the differential responses in resistant and susceptible genotypes
    (Wiley, 2017-07-12) Svetaz, Laura Andrea; Bustamante, Claudia Anabel; Goldy, Camila; Rivero, Nery Alberto; Müller, Gabriela Leticia; Valentini, Gabriel Hugo; Fernie, Alisdair R.; Drincovich, María Fabiana; Lara, María Valeria; https://orcid.org/0000-0003-4914-0242; Dr. Bellini, E.: provide P. persica selections DOFI-84.364.089 and DOFI-84.364.060; Dr. Giordani, E.: provide P. persica selections DOFI-84.364.089 and DOFI-84.364.060
    Leaf peach curl is a devastating disease affecting leaves, flowers and fruits, caused by the dimorphic fungus Taphrina deformans. To gain insight into the mechanisms of fungus pathogenesis and plant responses, leaves of a resistant and two susceptible Prunus persica genotypes were inoculated with blastospores (yeast), and the infection was monitored during 120 h post inoculation (h.p.i.). Fungal dimorphism to the filamentous form and induction of reactive oxygen species (ROS), callose synthesis, cell death and defence compound production were observed independently of the genotype. Fungal load significantly decreased after 120 h.p.i. in the resistant genotype, while the pathogen tended to grow in the susceptible genotypes. Metabolic profiling revealed a biphasic re-programming of plant tissue in susceptible genotypes, with an initial stage co-incident with the yeast form of the fungus and a second when the hypha is developed. Transcriptional analysis of PRs and plant hormone-related genes indicated that pathogenesis-related (PR) proteins are involved in P. persica defence responses against T. deformans and that salicylic acid is induced in the resistant genotype. Conducted experiments allowed the elucidation of common and differential responses in susceptible versus resistant genotypes and thus allow us to construct a picture of early events during T. deformans infection.