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Increased polyamine levels correlated with resistant responses to powdery mildew in oat

AuthorsMontilla-Bascón, Gracia ; Altabella, Teresa ; Rubiales, Diego ; Prats, Elena
Issue DateSep-2012
PublisherPhytochemical Society of Europe
CitationCongress on Bio-communication (2012)
AbstractOat crop is attracting increasing interested due to its good adaptation to a wide range of soil types and because on marginal soils can perform better than other small-grain cereals. The use of oat for uses other than fodder is increasing due to the beneficial antioxidant properties of this species. Indeed, oats constitute a rich source of biologically active secondary metabolites with a wide spectrum of activities. Several classes of compounds with antioxidant activity have been identified in oat including vitamin E tocols, flavonoids, and phenolic compounds that have been extensively used as additive to food and beverage products to preserve quality and are associated with flavor, color, and/or aroma. However, it has been hypothesized that most of these secondary compounds act as a chemical defence and constitutes a potential source for the development of pest control methods for specific diseases. Polyamines are secondary metabolites involved in various physiological events such as development, senescence and stress responses. They have been mainly related to abiotic stress resistance, i.e drought and cold, but recently their potential in disease resistance has being investigated. In this work we quantified by high performance liquid chromatographic (HPLC) methods polyamine content on oat leaves during a susceptible and a resistance response to one of the main constrains of this crop, the powdery mildew. Our results show significant differences, both constitutive and induced, between the susceptible and resistance genotypes for specific polyamines, such as putrescine and spermidine at crucial stages of the infection process. In addition, the level of polyamine degradation products such as 1,3-diamino propane suggests the involvement of these compounds in the generation of reactive oxygen species known to be involved in disease resistance.
DescriptionPóster presentado en el Congress on Bio-communication (biocom12), celebrado en Cádiz del 10 al 12 de septimebre de 2012.
Appears in Collections:(IAS) Comunicaciones congresos
(CRAG) Comunicaciones congresos
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