Year: 1999
Type: article
Abstract: This study was designed to investigate the potential of Alyssum muralel/Ig to extract metals from pools in the soil that are not available
to plants. Two experiments were carried out. To establish the effect
of phosphorus deficiency on Ni uptake, A. muralel/Ig was grown on a
serpentine soil from Albania (total Ni concentration: 1 316 mg kg-1)
with increasing rates of phosphate fertilization (0-100 mg kglsupg-1l/supg P). A
second experiment tested whether A. muralel/Ig and red clover
(Trifolium pratensel/Ig L. cv. Violetta, a non-accumulating plant) had
access to the same labile Ni pools in different soils. The two species
were grown on three soils, the Albanian serpentine soil used in the
first experiment and two agricultural soils from northeastern
France (total Ni concentration: 24 and 33 mg kg-1). Labile Ni had
been labelled with 63Ni in all soils before culture. The isotopic
composition (ICP, i.e. specific activity) of the Ni taken up by the two
species was calculated. Phosphate fertilization had no significant
effect on Ni uptake by A. murale. Plant ICP was identical for the two
plant species on each of the three soils, showing that A. murale
takes up Ni from the same labile pool of Ni in soils as red clover. Ni
uptake by A. muralel/Ig ranged from 2% of labile Ni on the serpentine
soil to 17% on one of the agricultural soils. We concluded that
the accumulation of Ni by A. muralel/Ig might not be due to the
solubilization of unavailable forms of Ni in soils. Results allowed us
to draw some practical conclusions on the use of lIgAlyssuml/Ig species
in the phytoextraction of soil Ni.
Source: HAL
Institutions: Laboratoire Sols et Environnement, Université de Lorraine
Language: English
Topic: Heavy metals in environment
Subfield: Pollution
Field: Environmental Science
Domain: Physical Sciences
SDGs: Zero hunger, Life on land
Open Access status: green
OpenAlex ID: W2460306791