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Impact of Abiotic Stresses on Plant Virus Transmission by Aphids

INRA, UMR385, CIRAD TA-A54K, Campus International de Baillarguet, CEDEX 05, 34398 Montpellier, France
Viruses 2020, 12(2), 216; https://doi.org/10.3390/v12020216
Received: 16 January 2020 / Revised: 5 February 2020 / Accepted: 8 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue Plant Virus Transmission by Vectors)
Plants regularly encounter abiotic constraints, and plant response to stress has been a focus of research for decades. Given increasing global temperatures and elevated atmospheric CO2 levels and the occurrence of water stress episodes driven by climate change, plant biochemistry, in particular, plant defence responses, may be altered significantly. Environmental factors also have a wider impact, shaping viral transmission processes that rely on a complex set of interactions between, at least, the pathogen, the vector, and the host plant. This review considers how abiotic stresses influence the transmission and spread of plant viruses by aphid vectors, mainly through changes in host physiology status, and summarizes the latest findings in this research field. The direct effects of climate change and severe weather events that impact the feeding behaviour of insect vectors as well as the major traits (e.g., within-host accumulation, disease severity and transmission) of viral plant pathogens are discussed. Finally, the intrinsic capacity of viruses to react to environmental cues in planta and how this may influence viral transmission efficiency is summarized. The clear interaction between biotic (virus) and abiotic stresses is a risk that must be accounted for when modelling virus epidemiology under scenarios of climate change. View Full-Text
Keywords: Plant virus; abiotic stress; insect; vector transmission; drought; temperature; CO2; viral accumulation; aphid Plant virus; abiotic stress; insect; vector transmission; drought; temperature; CO2; viral accumulation; aphid
MDPI and ACS Style

van Munster, M. Impact of Abiotic Stresses on Plant Virus Transmission by Aphids. Viruses 2020, 12, 216.

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