Composition, speciation and distribution of iron minerals in Imperata cylindrica.
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.
Amils
Ricardo
R
Centro de Biología Molecular, UAM, Cantoblanco, Madrid 28049, Spain. ramils@cbm.uam.es
de la Fuente
Vicenta
V
Rodríguez
Nuria
N
Zuluaga
Javier
J
Menéndez
Nieves
N
Tornero
Jesús
J
D007501:Iron / Q000032:analysis* / Q000737:chemistry* / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism / Q000648:ultrastructure; D018517:Plant Roots / Q000378:metabolism / Q000648:ultrastructure; D018547:Plant Stems / Q000378:metabolism / Q000648:ultrastructure; D006109:Poaceae / Q000737:chemistry* / Q000378:metabolism*; D027343:Rhizome / Q000378:metabolism / Q000648:ultrastructure
D007501:Iron