Uptake and distribution of nickel and other metals in the hyperaccumulator Berkheya coddii

A - Papers appearing in refereed journals

Robinson, B. H., Lombi, E., Zhao, F-J. and McGrath, S. P. 2003. Uptake and distribution of nickel and other metals in the hyperaccumulator Berkheya coddii. New Phytologist. 158 (2), pp. 279-285.

AuthorsRobinson, B. H., Lombi, E., Zhao, F-J. and McGrath, S. P.
Abstract

Berkheya coddii is a fast-growing, high biomass nickel (Ni) hyperaccumulator plant that has recently attracted attention for its possible use in the phytoextraction of Ni. The mechanisms of Ni accumulation, however, are not well understood in this plant. Plants were grown hydroponically in varying Ni concentrations to assess the uptake and distribution of Ni, and other metals, at the whole plant level. X-ray microanalyses (EDXA) of frozen hydrated tissues were conducted to determine the distribution of Ni at the cellular level in the leaves. Most Ni was found in the shoots, especially in the leaves. Leaf Ni concentration increased with age, whereas older stem sections had lower Ni concentrations than new growth. EDXA analyses revealed that the cuticle of the upper epidermis had a significantly higher Ni concentration than the rest of the leaf. The Ni concentrations in the other leaf tissues were not significantly different. This pattern of distribution contrasts sharply with some other hyperaccumulator species that commonly show a preferential accumulation of Ni and other metals in the vacuoles of the epidermal cells.

KeywordsPlant Sciences
Year of Publication2003
JournalNew Phytologist
Journal citation158 (2), pp. 279-285
Digital Object Identifier (DOI)doi:10.1046/j.1469-8137.2003.00743.x
Open accessPublished as non-open access
Funder project or code443
512
ISSN0028646X
PublisherWiley

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