Nickel localization on tissues of hyperaccumulator species of phyllanthus L. (Euphorbiaceae) from ultramafic areas of Cuba

Two species of perennial Phyllanthus (Euphorbiaceae) (Phyllanthus orbicularis and Phyllanthus discolor, both endemic to ultramafic areas of Cuba, and their natural hybrid, Phyllanthus xpallidus) were selected for metal localization microanalysis. Different plant tissues were analyzed by X-ray fluore...

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Bibliographic Details
Published in:Biological trace element research 2007-01, Vol.115 (1), p.67-86
Main Authors: Berazaín, R, de la Fuente, V, Sánchez-Mata, D, Rufo, L, Rodríguez, N, Amils, R
Format: Article
Language:English
Subjects:
Alkalies
Botany
Cuba
Euphorbiaceae
Euphorbiaceae - metabolism
Euphorbiaceae - ultrastructure
Hydrogen-Ion Concentration
Microscopy, Electron, Scanning
Nickel
Nickel - metabolism
Phyllanthus
Phyllanthus orbicularis
Scanning electron microscopy
Soil
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Summary:Two species of perennial Phyllanthus (Euphorbiaceae) (Phyllanthus orbicularis and Phyllanthus discolor, both endemic to ultramafic areas of Cuba, and their natural hybrid, Phyllanthus xpallidus) were selected for metal localization microanalysis. Different plant tissues were analyzed by X-ray fluorescence, inductively coupled plasma-atomic emission spectroscopy, and scanning electron microscopy coupled with an energy-dispersive X-ray probe. All of the studied taxa are nickel (Ni) hyperaccumulators and significant concentrations of this element were found in different leaf and stem tissues. The highest Ni content was found in the laticifer tubes, whereas leaf epidermis Ni content resulted to be much more relevant in terms of total metal storage. Calcium and magnesium were found more evenly distributed in leaf and stem tissues.
ISSN:0163-4984
1559-0720
0163-4984
DOI:10.1385/BTER:115:1:67