AI Article Synopsis
- Mangroves, particularly the species Avicennia schaueriana, show significant metal contamination from cadmium (Cd), resulting in metabolic, morphological, and cellular disturbances.
- Seedlings exposed to high levels of Cd experienced reduced leaf gas exchanges and died within 10 days, with the roots accumulating the most cadmium.
- The presence of cadmium led to structural changes in plant cells, including lignin deposition, chloroplast deformities, and general cytoplasm disorganization, posing risks to seedling survival and local biodiversity over time.
Article Abstract
Mangroves have been subject to more metal contamination, including cadmium (Cd). This study evaluated if a relatively short Cd exposure may induce metabolic, morphological and ultrastructural cell disturbance in Avicennia schaueriana. Cd induced evident constraints to seedlings since there was reduction in leaf gas exchanges and the plants did not survive for more than 10 days at a higher Cd exposure in controlled conditions. The highest Cd accumulation was observed in roots and gradually less in stem and leaves. Cadmium induced lignin deposition was observed in xylem cells of all vegetative organs. Intense sclerification in xylem cells, endoderm and change in the hypoderm organization were also detected. Cadmium clearly induced chloroplast deformities with ruptures of its membranes, thylakoids and core and provoked cytoplasm disorganization. These metal constraints under natural conditions for long term can lead to the accumulation of cellular and metabolic damages and jeopardize seedlings establishment and local biodiversity.
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| http://dx.doi.org/10.1016/j.marpolbul.2018.03.058 | DOI Listing |
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