查看文章

Hyperaccumulation of nickel to concentrations above 1000 mg kg-1 on a dry matter basis has become recognized as an unusual response by some plant species to the elevated nickel concentrations generally found in soils derived from ultramafic rocks (often referred to as serpentine soils). Such soils are widespread in the Balkans. h ese soils host some widespread species and a smaller number of regional or local endemics. Several serpentine areas in Albania (AL), Bulgaria (BG) and Greece (GR) have been surveyed because of the presence of nickel hyperaccumulating endemics, including some that are common for all three studied countries. he objectives of the study were to widen understanding of the distribution of the nickel hyperaccumulators and their uptake behaviour in relation to the characteristics of their native soil environments. Collection and chemical analysis of both plant and soil samples has allowed evaluation of phenotypic efficacy in hyperaccumulating nickel. In total, eight taxa were studied. In this work the highest Ni concentrations in leaves (1.5-2.0%) were found in Alyssum murale at Pojska (AL), A. murale at Kazak (BG), A. markgrafii at Gjegjan (AL) and h laspi kovatsii at Fotinovo (BG). he maximum quotients of plant Ni concentration to soil Ni concentration range from 13.9 for A. markgrafii to 6-7 for A. murale, T. kovatsii and T. tymphaeum from northern Greece. Eight of the taxa collected in this work show hyperaccumulation of Ni; these include A. murale subsp. pichleri and all of h laspi species studied from serpentine in Bulgaria. In total, twenty-five Ni hyperaccumulating taxa are now known from the Brassicaceae of …