Baseline expression of heat-shock proteins (HSPs) of a "thermotolerant" Mediterranean marine species largely influenced by natural temperature fluctuations

作者: Christophe Lejeusne , Thierry Pérez , Vanessa Sarrazin , Pierre Chevaldonné , None

DOI: 10.1139/F06-102

关键词:

摘要: Northwestern Mediterranean warming-related disease outbreaks and species shifts have recently been documented. Biomarkers of short-term effects on the health or resistance organisms are necessary to assess understand mechanisms affecting marine biodiversity. Heat-shock protein (HSP) expression was here believed present finer variations than previously reported in experimental studies, which we tested HSP sensitivity relevance global warming context. One population "thermophilic" cave mysid Hemimysis margalefi monitored over 4 years. Three HSPs presented recurrent expression. Among them, HSP50 HSP60 expressions varied seasonally with environmental temperature. displayed greatest variability most closely related temperature fluctuations. Multiple regression showed that while main stressor temperature, demographic variables (proportion immatures, proportion gravid females) also influenced variability. Such a monitoring baseline natural had only rarely conducted. are, how- ever, good biomarkers evaluate episodes heat stress wild. This study provides essential spatial temporal reference for further situ analyses is prerequisite diagnostic predictive approaches.

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