Publications by authors named "Carmen Callejas"

Spain is the leading producer of olives and olive oil. Ninety-five percent of world production originate from Spain and other regions of the Mediterranean Basin. However, these olive-growing countries face a major problem, the harmful fly , the main pest of olive crops.

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The olive fruit fly () is the most damaging olive pest. The intensive use of organophosphates (OPs) to control it, led to an increase in resistance in field populations. This study assesses the presence and distribution of three mutations at the gene related to target site insensitivity to OPs in Spain.

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Spanish freshwater ecosystems are suffering great modification and some macroinvertebrates like Austropotamobius italicus, the white-clawed crayfish, are threatened. This species was once widely distributed in Spain, but its populations have shown a very strong decline over the last thirty years, due to different factors. Three Spanish populations of this crayfish--from different scenarios--were analysed with nuclear (microsatellites) and mitochondrial markers (COI and 16S rDNA).

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Fusarium proliferatum is together with Fusarium verticillioides the main source of fumonisins, a health risk mycotoxin, contaminating agro-products. Contrary to F. verticillioides, it colonizes a wide range of host plants besides maize, such as wheat or barley among others, in particular in certain regions (Southern Europe).

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The major facilitator superfamily (MFS) is a ubiquitous group of proteins involved in the transport of a wide range of compounds, including toxins produced by fungal species. In this paper, a novel MFS encoding gene (Fusarium iron related gene or FIR1), which had shown an up-regulation in fumonisin-inducing conditions, has been identified and characterized. The deduced protein sequence, which predicted 14 transmembrane domains typical of MFS transporters and its phylogenetic relationships with representative members of MFS transporters suggested a possible function of FIR1 as a siderophore transporter.

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