The physiological consequences of varied heat exposure events in adult Myzus persicae : a single prolonged exposure compared to repeated shorter exposures

Behnaz Ghaedi; Nigel R. Andrew

doi:10.7717/peerj.2290

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The physiological consequences of varied heat exposure events in adult Myzus persicae : a single prolonged exposure compared to repeated shorter exposures

Journal article

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The physiological consequences of varied heat exposure events in adult Myzus persicae : a single prolonged exposure compared to repeated shorter exposures

Behnaz Ghaedi and Nigel R. Andrew

PeerJ (San Francisco, CA), Vol.4, e2290

02/08/2016

DOI: https://doi.org/10.7717/peerj.2290

PMCID: PMC4975027

PMID: 27547583

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Abstract

Multidisciplinary Sciences

Science & Technology

Ecosystem Science

Entomology

Environmental Sciences

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.

Details

Title: The physiological consequences of varied heat exposure events in adult Myzus persicae : a single prolonged exposure compared to repeated shorter exposures
Creators: Behnaz Ghaedi - University of New England
Nigel R. Andrew - University of New England
Publication Details: PeerJ (San Francisco, CA), Vol.4, e2290
Publisher: Peerj Inc
Number of pages: 22
Grant note: UNE
Identifiers: 991013087220602368
Copyright: (c) 2016 Ghaedi and Andrew. Distributed under Creative Commons CC-BY 4.0.
Academic Unit: Faculty of Science and Engineering; Science
Language: English
Resource Type: Journal article

The physiological consequences of varied heat exposure events in adult Myzus persicae : a single prolonged exposure compared to repeated shorter exposures

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