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Descripción
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| The phloem is part of the plant long-distance transport system that is important for the distribution of assimilates between different organs. Moreover, its pathway is used to transfer important information that is neccessary to coordinate nutrient availability with the resources required for defense responses, growth and reproduction between organs. During recent years an increasing number of RNAs, including rRNAs, mRNAs, tRNAs, but also the important post-transcriptional gene expression regulators micro (mi) and short interfering (si) RNAs has been identified from phloem samples of different plant species. Because fully differentiated sieve elements are incapable of transcription and translation, their involvement in systemic communication has been suggested. Some nutrient-responsive miRNAs were recently shown to accumulate in phloem sap when plants were grown under the respective stress conditions (1,2). Moreover, grafting experiments provided evidence that specific miRNAs, in particular the nutrient deficiency-induced miR395 and miR399, are indeed mobile in vivo and can influence the expression of their target transcripts at their destination (3,4). The results indicate that miRNA translocation via the phloem is important for a temporal coordination of stress responses between plant organs. The presentation will summarize the current knowledge about miRNAs in the phloem, their translocation, and the possible functions they might have in nutrient stress responses. | |
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Internacional
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Si |
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Nombre congreso
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COST FA0806 Meeting |
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Tipo de participación
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960 |
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Lugar del congreso
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Montpellier, Francia |
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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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12/09/2011 |
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Fecha fin congreso
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14/09/2011 |
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Desde la página
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0 |
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Hasta la página
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0 |
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Título de las actas
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Libro de resúmenes del congreso |