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Unveiling the Behavior of an Endangered Facultative Cuprophyte Coincya Species in an Abandoned Copper Mine (Southeast Portugal)
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Orientador(es)
Resumo(s)
Plant–soil interactions of endangered species with a high-priority conservation status are
important to define in situ and ex situ conservation and restoration projects. The threatened endemic
Coincya transtagana, thriving in the southwest of the Iberian Peninsula, can grow in metalliferous
soils. The main goal of this study was to investigate the behavior of this species in soils rich in
potentially toxic elements in the abandoned Aparis Cu mine. Soil samples were characterized for
physicochemical properties and multielemental composition, as well as biological activity, through
an analysis of enzymatic activities. Plant biomass was assessed, and multielemental analysis of the
plants was also performed. The mine soils had slightly basic pH values and were non-saline and
poor in mineral N-NH4, with medium-to-high organic matter concentration and medium cation-
exchange capacity. In these soils, dehydrogenase had the highest activity, whereas protease had
the lowest activity. The total concentrations of Cu (1.3–5.9 g/kg) and As (37.9–118 mg/kg) in soils
were very high, and the available fraction of Cu in the soil also had high concentration values
(49–491 mg/kg). Moreover, this study shows for the first time that C. transtagana had high uptake
and translocation capacities from roots to shoots for Cu, Ni, and Cr. Although Cu in the plants’ aerial
parts (40–286 mg/kg) was considered excessive/toxic, no signs of plant toxicity disorders or P uptake
reduction were detected. This preliminary study revealed that C. transtagana is Cu-tolerant, and it
could be used for phytoremediation of soils contaminated with potentially toxic elements, while also
contributing to its conservation.
Descrição
Palavras-chave
Aparis mine Coincya transtagana conservation metallophytes soil enzymatic activities threatened species
Contexto Educativo
Citação
Caperta, A.D.; Couchinho, F.; Cortinhas, A.; Abreu, M.M. Unveiling the Behavior of an Endangered Facultative Cuprophyte Coincya Species in an Abandoned Copper Mine (Southeast Portugal). Plants 2024, 13, 2847
Editora
MDPI