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Context-dependent integrated stress resistance promotes a global invasive pest

Insect Science 2022年第6期29卷 1790-1804页

作者： vimbai l.tarusikirwa Ross N.Cuthbert Reyard Mutamiswa Casper Nyamukondiwa Department of Biological Sciences and Biotechnology Botswana International University of Science and TechnologyPalapyeBotswana GEOMAR Helmholtz-Zentrum fur Ozeanforschung Kiel KielGermany School of Biological Sciences Queen's University BelfastNorth ern IrelandUnited Kingdom Department of Zoology and Entomology University of the Free StateBloemfonteinSouth Africa Tugwi-Mukosi Multidisciplinary Research Institute Midlands State UniversityGweruZimbabwe Department of Zoology and Entomology.Rhodes University MakhandaSouth Africa

In nature,insects concurrently face multiple environmental stressors,a sce-nario likely increasing with climate *** stress resistance(ISR)thus often improves fitness and could drive invasiveness,but how physiological mechanisms influ-ence invasion has lacked ***,we investigated cross-tolerance to abiotic stress factors which may influence range limits in the South American tomato pinworm a global invader that is an ecologically and socially damaging crop ***,we tested the effects of prior rapid cold-and heat-hardening(RCH and RHH),fasting,and desiccation on cold and heat tolerance traits,as well as starvation and desiccation sur-vivability between *** life *** effects on critical thermal minima(CT_(min))and maxima(CT_(max))were inconsistent,showing significantly deleterious effects of RCH on adult CT_(max) and CT_(min) and,conversely,beneficial acclimation effects of RCH on larval CT_(min).While no beneficial effects of desiccation acclimation were recorded for desiccation tolerance,fasted individuals had significantly higher survival in adults,whereas fasting negatively affected larval ***,fasted and desiccation acclimated adults had significantly higher starvation tolerance,showing strong evidence for *** results show context-dependent ISR traits that may promote *** fitness and *** the frequent overlapping occurrence of these divergent stressors,ISR reported here may thus partly elucidate the observed rapid global spread of *** into more stressful environments than *** information is vital in determining the underpinnings of multistressor responses,which are fundamental in forecasting species responses to changing environments and management responses.

关键词： acclimation cross-talk cross-tolerance invasive species thermal tolerance tomato leaf miner

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