title: Physiological responses of Corythucha ciliata adults to high temperatures under laboratory and field conditions.
abstract: Under high temperature conditions, insects can tolerate to survive through various physiological mechanisms, which have been well documented in laboratory studies. However, it is still unclear as to whether these laboratory data can scale up to those in the field. Here we studied dynamics of heat-induced metabolites in Corythucha ciliata adults under both laboratory and field conditions to examine their significance in thermal tolerance of the species. We compared the effects of controlled thermal treatments (2h at 33-43 °C at 2 °C intervals in the laboratory) and naturally increasing thermal conditions (10:00-14:00 at 2-h intervals (33.5-37.2 °C) on a hot summer day in a field in Shanghai, China) on water content and levels of water-soluble protein, triglycerides, mannitol, and sorbitol in the adult bodies. The results showed that water content significantly decreased and all other metabolic parameters significantly increased in response to temperature stresses with similar patterns in both the laboratory and field, although the respective threshold temperatures were different under the two conditions. The close linkage observed in the two conditions suggests that a short period of heat stress induces water loss and accumulation of thermal metabolites in C. ciliata adults. This heat-resistance provides a defense mechanism counteracting thermal damage in C. ciliata.
authors.affiliation: Department of Plant Protection, Shanghai Landscape Gardening Research Institute, #899 Longwu Road, Shanghai 200232, PR China; Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, Shanghai 200433, PR China.
authors.forename: Rui-Ting
authors.initials: RT
authors.lastname: Ju
authors.affiliation: Department of Plant Protection, Shanghai Landscape Gardening Research Institute, #899 Longwu Road, Shanghai 200232, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Gao
authors.affiliation: Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, Shanghai 200433, PR China.
authors.forename: Xu-Hui
authors.initials: XH
authors.lastname: Zhou
authors.affiliation: Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, #220 Handan Road, Shanghai 200433, PR China. Electronic address: bool@fudan.edu.cn.
authors.forename: Bo
authors.initials: B
authors.lastname: Li
mesh_terms: D000818:Animals; D018869:Heat-Shock Response; D020062:Heteroptera / Q000378:metabolism / Q000502:physiology*; D008353:Mannitol / Q000378:metabolism; D011506:Proteins / Q000378:metabolism; D013012:Sorbitol / Q000378:metabolism; D014280:Triglycerides / Q000378:metabolism; D014867:Water / Q000378:metabolism
chemical_list: D011506:Proteins; D014280:Triglycerides; D014867:Water; D008353:Mannitol; D013012:Sorbitol
keywords: Heat stress; Laboratory population; Metabolic process; Nature population; Sycamore lace bug