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Descripción
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| AVRk1 and AVRa10 are effector proteins that contribute to the successful establishment of haustoria in Blumeria graminis f sp hordei (Bgh), the causal agent of barley powdery mildew. They belong to a large gene family in the genome of Bgh, with homologous sequences in other formae speciales (ff. spp) infecting other grasses. Members of the AVRk1 family are found in the proximity of TE1a LINE-1 retrotransposons and both can be expressed as a single transcript. We have studied the extensive proliferation of the AVRk1 gene family throughout the genome of B. graminis, with sequences diverging in ff. spp adapted to infect different hosts. The frequency with which members of the AVRk1 and TE1a retrotransposon lineages occur together in the genome is highly significant, and phylogenetic analysis show that both classes of sequences have coevolved. This is the first direct evidence that a parasite effector gene family and a particular retrotransposon lineage are consistently associated and have coevolved. The coevolution of these two entities indicates a mutual benefit to the association, which could ultimately contribute to parasite adaptation and success. We propose that the association would benefit 1) the powdery mildew fungus, by providing a mechanism for amplifying and diversifying effectors and 2) the associated retrotransposons, by providing a basis for their maintenance through selection in the fungal genome. | |
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Internacional
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Si |
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Nombre congreso
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12th International Cereal Rusts and Powdery Mildews Conference |
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Tipo de participación
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960 |
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Lugar del congreso
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Antalya, Turquía |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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13/10/2009 |
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Fecha fin congreso
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16/10/2009 |
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Desde la página
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13 |
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Hasta la página
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13 |
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Título de las actas
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ABSTRACTS |