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Comparison in copper accumulation and physiological responses of Gracilaria lemaneiformis and G. lichenoides (Rhodophyceae).
- Source :
- Chinese Journal of Oceanology & Limnology; Jul2013, Vol. 31 Issue 4, p803-812, 10p
- Publication Year :
- 2013
-
Abstract
- Heavy metal pollution has become a worldwide problem in aquaculture. We studied copper (Cu) accumulation and physiological responses of two red algae Gracilaria lemaneiformis and Gracilaria lichenoides from China under Cu exposure of 0-500 μg/L in concentration. Compared with G. lemaneiformis, G. lichenoides was more capable in accumulating Cu, specifically, more Cu on extracellular side (cell wall) than on intracellular side (cytoplasm) and in cell organelles (especially chloroplast, cell nucleus, mitochondria, and ribosome). In addition, G. lichenoides contained more insoluble polysaccharide in cell wall, which might promote the extracellular Cu-binding as an efficient barrier against metal toxicity. Conversely, G. lemaneiformis was more vulnerable than G. lichenoides to Cu toxin for decreases in growth, pigment (chlorophyll a, chlorophyll b, phycobiliprotein, and β-carotene) content, and photosynthetic activity. Moreover, more serious oxidative damages in G. lemaneiformis than in G. lichenoides, in accumulation of reactive oxidative species and malondialdehyde, and in electrolyte leakage, because of lower antioxidant enzyme (superoxide dismutase and glutathione reductase) activities. Therefore, G. lichenoides was less susceptible to Cu stress than G. lemaneiformis. [ABSTRACT FROM AUTHOR]
- Subjects :
- HEAVY metal toxicology
AQUACULTURE
COPPER poisoning
GRACILARIA
ORGANELLES
CHLOROPHYLL
Subjects
Details
- Language :
- English
- ISSN :
- 02544059
- Volume :
- 31
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Chinese Journal of Oceanology & Limnology
- Publication Type :
- Academic Journal
- Accession number :
- 88936187
- Full Text :
- https://doi.org/10.1007/s00343-013-2261-5