Comparative studies of nickel, cobalt, and copper uptake by some nickel hyperaccumulators of the genus Alyssum

Abstract

The uptake of Ni, Co, and Cu by the nickel hyperaccumulator Alyssum troodii Boiss and the non-accumulator Aurinia saxatilis (L.) Desv. were studied in pot trials using artificial rooting media with varying concentrations of the metals added as soluble salts, singly and in combination. The ability of five other Ni hyperaccumulating species of Alyssum to hyperaccumulate Co was also investigated.

The Role of Metal Transport and Tolerance in Nickel Hyperaccumulation by Thlaspi goesingense Halacsy

“…l), has also been reported for Alyssum sp. hyperaccumulators (Gabbrielli et al, 1991;Homer et al, 1991;Kramer et al, 1996), including fieldcollected samples of the Ni hyperaccumulator Alyssum pintodusilvae (Menezes de Sequeira and Pinto da Silva, 1991) and of the Zn hyperaccumulator T. caerulescens . Similar to the data concerning T. goesingense presented here, biomass production in other metal hyperaccumulators of the genera Tklaspi and Alyssum were unaffected by Ni concentrations of up to several hundred micromolar in hydroponic solution (Gabbrielli et al, 1982;Lloyd-Thomas, 1995;Kramer et al, 1996).…”

“…and more tolerant than a related species from a nonmetalliferous habitat (Homer et al, 1991;Rauser, 1995). Among the compounds that have been proposed to participate in metal detoxification in hyperaccumulators are lowmolecular-weight chelators such as citrate (Lee et al, 1978) and free His (Kramer et al, 1996).…”

Phytoextraction of Metal Contaminants by Typha Angustifolia: Interaction of Lead and Cadmium in Soil-Water Microcosms

“…Minnie et al [24] studied phytoextraction of soil cobalt using hyperaccumulator plants and found interaction and decreased uptake of nickel in the presence of cobalt. Homer et al [25] also reported that the uptake of cobalt may suppress nickel uptake, indicating a possible synergistic or antagonistic relationship between the elements.…”

Phytoremediation of Soil Trace Elements

“…Ni hyperaccumulators they collected in that same time period had much poorer Co accumulation from serpentine soils and had low tolerance of absorbed Co [151]. Li et al [41] reported that Alyssum murale could accumulate some Co from serpentine soils, and that plant Co concentration increased with soil acidification in contrast with Ni accumulation, which decreased with soil acidification.…”