Interactive effects of metal contamination and pathogenic organisms on the marine bivalve Cerastoderma edule

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• 作者：Ika Paul-Pont ; Patrice Gonzalez ; Magalie Baudrimont ; Florence Jude ; Natalie Raymond ; Line Bourrasseau ; Nelly Le Goï ; c ; Frances Haynes ; Alexia Legeay ; Christine Paillard ; Xavier de Montaudouin
• 关键词：Cerastoderma edule ; Metal ; Parasite ; Bacteria ; Metallothionein ; Immune response
• 刊名：Marine Pollution Bulletin
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：60
• 期：4
• 页码：515-525
• 全文大小：438 K

文摘

The present study evaluated the interactive effects of cadmium contamination and pathogenic organisms (trematodes Himasthla elongata and bacteria Vibrio tapetis) singularly and in combination during 7 days on the bivalve Cerastoderma edule. Some defense-related activities were analyzed such as genetic expression, metallothionein and immune responses. Trematode metacercarial infection, similar whatever the treatment, induced the strongest responses of immune parameters. Particularly, the interaction between cadmium and parasite exposures induced unusual responses on gene expression and immune responses. No effect of bacterial challenge appeared on bivalve responses, nevertheless a strong mortality of V. tapetis infected cockles occured between 7 and 14 days. Cadmium bioaccumulation was significantly modulated by both pathogenic organisms. Furthermore, an antagonistic effect of trematodes and bacteria was shown on metal bioaccumulation of co-infected cockles. These results highlighted the importance of considering the multiplicity of perturbation sources in coastal ecosystems to assess the health status of organisms.