2023
DOI: 10.3390/plants12162930
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Cadmium up Taking and Allocation in Wood Species Associated to Cacao Agroforestry Systems and Its Potential Role for Phytoextraction

Donald A. Galvis,
Yeirme Y. Jaimes-Suárez,
Jairo Rojas Molina
et al.

Abstract: Trees in cacao Agroforestry systems (AFS) may present a high potential for cadmium (Cd) phytoextraction, helping to reduce Cd in cacao (Theobroma cacao L.) plants grown in contaminated soils. To assess this potential, four forest fine-woody species commonly found in cacao high-productive sites in Colombia (Tabebuia rosea, Terminalia superba, Albizia guachapele, and Cariniana pyriformis) were exposed to contrasting CdCl2 contamination levels (0, 6, and 12 ppm) on a hydroponic medium. Growth dynamics, tolerance … Show more

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“…During the translocation process, heavy metals may concentrate in greater quantities in aerial parts such as shoots and beans, mediated by the xylem (Wang et al, 2021 ). Some species may exhibit higher concentrations of heavy metals in older or senescent leaves, indicating an active exclusion or defence mechanism against toxic elements, including Cd (Galvis et al, 2023 ). Once the leaves fall off the tree, they carry the toxic element with them.…”
Section: Discussionmentioning
confidence: 99%
“…During the translocation process, heavy metals may concentrate in greater quantities in aerial parts such as shoots and beans, mediated by the xylem (Wang et al, 2021 ). Some species may exhibit higher concentrations of heavy metals in older or senescent leaves, indicating an active exclusion or defence mechanism against toxic elements, including Cd (Galvis et al, 2023 ). Once the leaves fall off the tree, they carry the toxic element with them.…”
Section: Discussionmentioning
confidence: 99%