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Title: The physiological consequences of varied heat exposure events in adult 'Myzus persicae': A single prolonged exposure compared to repeated shorter exposures
Contributor(s): Ghaedi, Behnaz (author); Andrew, Nigel R  (author)orcid 
Publication Date: 2016
Open Access: Yes
DOI: 10.7717/PEERJ.2290Open Access Link
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Abstract: The study of environmental stress tolerance in aphids has primarily been at low temperatures. In these cases, and in the rare cases of high temperature tolerance assessments, all exposures had been during a single stress event. In the present study, we examined the physiological consequences of repeated high temperature exposure with recovery periods between these stress events in 'Myzus persicae'. We subjected individuals to either a single prolonged three hour heating event, or three one hour heating events with a recovery time of 24 h between bouts. Aphids exposed to repeated bouts of high temperatures had more glucose and higher expression of proteins and osmolyte compounds, such as glycerol, compared to the prolonged exposure group. However, aphids exposed to the repeated high temperature treatment had reduced sources of energy such as trehalose and triglyceride compounds than the prolonged exposure group. Recovery time had more physiological costs (based on production of more protein and consumption of more trehalose and triglyceride) and benefits (based on production of more osmolytes) in repeated high temperature treatments. As aphids are known to respond differently to constant versus 'natural' fluctuating temperature regimes, conclusions drawn from constant temperature data sets may be problematic. We suggest future experiments assessing insect responses to thermal stress incorporate a repeated stress and recovery pattern into their methodologies.
Publication Type: Journal Article
Source of Publication: PeerJ, v.4, p. 1-22
Publisher: PeerJ Ltd
Place of Publication: United Kingdom
ISSN: 2167-8359
Field of Research (FOR): 060808 Invertebrate Biology
060806 Animal Physiological Ecology
Socio-Economic Outcome Codes: 960301 Climate Change Adaptation Measures
970106 Expanding Knowledge in the Biological Sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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Appears in Collections:Journal Article
School of Environmental and Rural Science

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