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Descripción
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| Symbiotic nitrogen fixation is a process that requires relatively vast amounts of essential transition metals. These are nutrients that have to be transferred from the host plant to the nodule, where nitrogen fixation is being carried out. Using synchrotron-based X-ray fluorescence, trace element distribution in Medicago truncatula nodules was studied. The results indicated that iron, and most likely other metals, are released from the vasculature into the apoplast of the infection/maturation area of the nodule, where plasma membrane transporters would introduce them into the infected cell cytosol. MtZIP6 is a ZIP family member that transports towards the cell cytosol Fe2+, Zn2+, and Mn2+. Transcriptomic analyses indicate that MtZIP6 is expressed exclusively in the nodule, with the highest expression levels in the infection/maturation zone. This makes MtZIP6 a candidate for introducing divalent transition metal ions into rhizobia-infected cells. | |
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Internacional
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ISBN
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Tipo de Tesis
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Master |
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Calificación
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Sobresaliente |
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Fecha
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06/06/2013 |