期刊
MICROSCOPY RESEARCH AND TECHNIQUE
卷 83, 期 2, 页码 148-155出版社
WILEY
DOI: 10.1002/jemt.23397
关键词
coastal lagoon; copper; zinc; hepatopancreas; Orchestia; transmission electron microscopy
资金
- Research Laboratory of Diversity, Management and Conservation of Biological Systems, Faculty of Science of Tunis, University of Tunis El Manar
- Erasmus Mundus Al Idrisi II Programme of the European Union
The hepatopancreas of crustaceans species has been recognized as an essential target organ to assess trace elements' effects. Due to its dynamic and capability of detoxifying trace metal, this organ often indicates distinct pathological disturbances. In the present work, we intend to evaluate the bioaccumulation of trace metal in three Orchestia species (Orchestia montagui, Orchestia gammarellus, and Orchestia mediterranea) living in symmetry in the banks of Bizerte lagoon (37 degrees 13 ' 8 '' N 09 degrees 55 ' 1 '' E) after their exposure during 14 days to a mixture of copper and zinc, and to highlight the effect of these metals on their hepatopancreas ultrastructure using transmission electron microscopy. At the end of the experiment, results showed that the mortality and the body mass varied according to the used nominal concentrations. Significant alterations were noted in all the treatment groups. The degree of these alterations depends on the used concentration, and they are represented especially by the cells remoteness and the border lyses, the reduction of the nuclear volume, the increase in the cytoplasm density with the presence of trace metal in the nucleus as well as in the vacuole, the disorganization and the destruction of microvilli, the condensation of the majority of cellular organelles and mitochondria swelling. Through this study, Orchestia genus could be an attractive candidate for the biochemical study of trace metal toxicity in Tunisian wetlands.
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