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Orientador(es)
Resumo(s)
The bacterium Pseudomonas savastanoi pv. savastanoi [Psv), is responsible for the
'olive knot' disease producing tumorous galls mostiy on stems and branches of olive trees. This
endangers olive harvest, reducing tree strength and ultimately killing them. Interaction of Psv
at infection sites with other microorganisms, mainly epiphytic but in the knots as well, cause
disease spread. In olive knots some of the latter either depress Psv growth or increase knot
sizes. Preventíon strategies appear the better way to contrai olive knot. Naturally occurring
antagonistíc microorganisms able to suppress Psv constitute biological agents, that can reduce
olive knot incidence. The endophytic fungal community associated to Psv in the phyllosphere
of olive tree cultivars is able to antagonize Psv following experiments in vitro. This antagonistíc
activity againts Psv was particularly displayed by the fungus Epícoccum nigrum, that was
showed the capacity to inhibited the Psv growth/biomass on 96%, after 48 hours ofinteraction.
A nonlinear mathematical system is introduced for understanding the action of this resident
fungus [E. nigrum) in Psv development. It accounts for interactions between o\ive-Psv-E. nígrum
and increases our knowledge on the olive knot disease spreading.
Descrição
Palavras-chave
Olea europaea Pseudomonas savastanoi
Contexto Educativo
Citação
Venturino, Ezio; Berardo, C.; Bulai, I.M.; Baptista, Paula; Gomes, Teresa (2018). A three way trees-fungi-bacteria interactions (Olea europaea, Epicoccum nigrum and Pseudomonas savastanoi pv. savastanoi (Psv)) mathematical model for the “olive knot” disease eradication. In 3rd Annual Meeting of the COST Action FA1405, Three-way interactions between plants, microbes and arthropods: impacts, mechanisms and utilization. St Julians, Malta