College of Life Sciences, Peking University, Beijing 100871, PR China; Department of Biosciences, PL 65, Viikinkaari 1, FI-00014 University of Helsinki, Finland.
Department of Biosciences, PL 65, Viikinkaari 1, FI-00014 University of Helsinki, Finland.
J Therm Biol. 2014 May;42:33-9. doi: 10.1016/j.jtherbio.2014.02.018. Epub 2014 Mar 7.
Ambient temperature is an ubiquitous environmental factor affecting all organisms. Global climate change increases temperature variation and the frequency of extreme temperatures, which may pose challenges to ectotherms. Here, we examine phenotypic plasticity to temperature and genotypic effects on thermal tolerance in the Glanville fritillary butterfly (Melitaea cinxia). We found no significant difference in heat or cold tolerance in populations originating from a continental climate in China and from Finland with moderate temperature variation. Acclimation to large-amplitude temperature variation increased heat tolerance in both populations, but decreased cold tolerance and increased hsp70-2 expression in the Chinese population only. The latter result indicates a genotypic effect in the response to temperature variation. In the Finnish population, a non-synonymous SNP in the phosphoglucose isomerase (Pgi) gene was associated with heat knock-down time.
环境温度是影响所有生物体的无处不在的环境因素。全球气候变化增加了温度变化和极端温度的频率，这可能对变温动物构成挑战。在这里，我们研究了温度的表型可塑性和热耐受性的基因型效应在格氏萤叶甲蝴蝶（Melitaea cinxia）中。我们发现，来自中国大陆性气候和芬兰温和温度变化的种群在耐热性或耐寒性方面没有显著差异。对大振幅温度变化的驯化增加了两个种群的耐热性，但降低了耐寒性，并仅增加了中国种群的 hsp70-2 表达。后一结果表明对温度变化的响应存在基因型效应。在芬兰种群中，磷酸葡萄糖异构酶（Pgi）基因中的非同义 SNP 与热击倒时间有关。
