Physiological and biochemical response of Dunaliella salina to cadmium pollution
| Autor: | Khaled Bellassoued, Habib Ayadi, Abdelfatteh El Feki, Khaled Athmouni, Taheni Belghith |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification Cadmium Reactive oxygen species biology Plant physiology chemistry.chemical_element Chlorophyceae Plant Science 010501 environmental sciences Aquatic Science Carbohydrate biology.organism_classification 01 natural sciences 03 medical and health sciences 030104 developmental biology chemistry Phytochemical Biochemistry Polyphenol Dunaliella salina 0105 earth and related environmental sciences |
| Zdroj: | Journal of Applied Phycology. 28:991-999 |
| ISSN: | 1573-5176 0921-8971 |
| DOI: | 10.1007/s10811-015-0630-5 |
| Popis: | The present study investigates the growth of Dunaliella salina as influenced by cadmium (Cd) contamina- tion. Growth was measured in terms of cell number and chlorophyll a content and was found to decrease with increasing Cd concentration. This metal, which was mainly removed by bioadso rption to cell surfaces (95.34±3.04 % of total Cd removed), also drastically reduced the soluble and insoluble carbohydrate (0.41±0.01 and 0.81±0.07 pg cell �1 , respectively, for 150 mg Cd L �1 ) concentrations and increased the total metallothioneins protein content (from 0.11±0.02 for the control culture to 3.30±0.2 for 100 mg Cd L �1 ). In addition, the presence of this metal in the medium stimulated the synthesis of some secondary metabolites such as polyphenols, flavonoids, and carotenoids.Thesecompoundshadanimportantroletoprotect D. salina against the reactive oxygen species (ROS) generated by the presence of Cd in the medium as shown by the increase of the antioxidant capacity of D. salina exposed to Cd. |
| Databáze: | OpenAIRE |
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