Composition, speciation and distribution of iron minerals in Imperata cylindrica. |
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Authors: | Ricardo Amils Vicenta de la Fuente Nuria Rodríguez Javier Zuluaga Nieves Menéndez Jesús Tornero |
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Affiliation: | Centro de Biología Molecular, UAM, Cantoblanco, Madrid 28049, Spain. ramils@cbm.uam.es |
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Abstract: | A comparative study of the roots, rhizomes and leaves of an iron hyperaccumulator plant, Imperata cylindrica, isolated from the banks of an extreme acidic environment, using complementary techniques: Mösbauer spectroscopy (MS), X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled to energy-dispersive X-ray microanalysis (EDAX) and transmission electron microscopy (TEM), has shown that two main biominerals, jarosite and ferrihydrate-ferritin, accumulate in the different tissues. Jarosite accumulates mainly in roots and rhizomes, while ferritin has been detected in all the structures. A model of iron management in I. cylindrica is presented. |
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