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KMID : 0613820150250060615
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Journal of Life Science
2015 Volume.25 No. 6 p.615 ~ p.623
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Stress Resistance of Zacco koreanus due to Exposure of Cement Powder
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Shin Myung-Ja
Lee Jong-Eun
Seo Eul-Won
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Abstract
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This study investigated the effects of dissolved cement powder on Zacco koreanus by analyzing morphophysiological changes. The gills exposed to dissolved cement powder developed abnormal shapes in their secondary lamellae and increased numbers of mucous cells after long-term exposure. Additionally, clubbing, edema, and exfoliation of the epithelial cells were observed in the secondary lamellae. In the kidney tissue, the space in Bowman’s capsule was widened, and in the integument tissue the arrangement of the dermis was irregular due to the thinned epidermis. These results suggest that long-term exposure to cement powder can significantly affect morphological change, resulting death. The activities of antioxidant enzymes and LDH tended to increase commensurately with the duration of cement exposure. It was concluded that up-regulated proteins were the stress proteins involved in myofibrillar-protein production and down-regulated proteins were involved in glycolysis and energy metabolism after the integument’s exposure to cement. According to these results dissolved cement powder is a serious threat to the survival of fish because it causes morphological changes and weakens physiological activity in Z. koreanus tissues.
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KEYWORD
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Cement exposure, cement powder, enzyme, tissues, Zacco koreanus
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