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Título

Nickel distribution in the hyperaccumulator Alyssum serpyllifolium Desf. spp. from the Iberian Peninsula

AutorFuente, Vicenta de la; Rodríguez, Nuria ; Díez-Garretas, B.; Rufo, Lourdes; Asensi, A.; Amils, Ricardo
Palabras claveAlyssum serpyllifolium
EDXS
Elemental mapping
Hyperaccumulation
Iberian Peninsula
Nickel
Fecha de publicaciónjul-2007
EditorTaylor & Francis
CitaciónPlant Biosystems 141(2): 170-180 (2007)
ResumenThe relative concentration and distribution of nickel (Ni) in vegetative tissues (leaves, stems and trichomes) and reproductive organs (seeds) was studied using energy-dispersive X-ray microanalysis (EDXS) and scanning electron microscopy (SEM) in two previously studied Ni-hyperaccumulator subspecies of Alyssum serpyllifolium Desf. growing naturally in ultramafic soils of the Iberian Peninsula: A. serpyllifolium ssp. lusitanicum Dudley & P. Silva and A. serpyllifolium ssp. malacitanum Rivas Goday ex G. Lpez. Both taxa showed that Ni accumulates preferentially in the leaves, exhibiting a homogeneous distribution on both epidermis surfaces. The highest Ni concentrations were found inside the epidermal cells and at the base of trichome stalks. Ni accumulation in seeds was lower than in the vegetative organs. The location of Ni in these plants allows us to postulate that its accumulation is a protection mechanism against external stress.
Descripción11 pages.-- Research article.
Versión del editorhttp://dx.doi.org/10.1080/11263500701401422
URIhttp://hdl.handle.net/10261/18562
DOI10.1080/11263500701401422
ISSN1126-3504 (Print)
1724-5575 (Online)
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