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Int. J. Mol. Sci. 2019, 20(4), 806; https://doi.org/10.3390/ijms20040806

Unravelling the Complexity of Plant Defense Induced by a Simultaneous and Sequential Mite and Aphid Infestation

1
Department of Applied Entomology, Warsaw University of Life Sciences—SGGW, 02-776 Warsaw, Poland
2
Department of Plant Genetics, Breeding and Biotechnology, Warsaw University of Life Sciences—SGGW, 02-776 Warsaw, Poland
3
School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK
*
Author to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 5 February 2019 / Accepted: 10 February 2019 / Published: 13 February 2019
(This article belongs to the Special Issue Plant-Insect Interactions 2018)
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Abstract

In natural and agricultural conditions, plants are attacked by a community of herbivores, including aphids and mites. The green peach aphid and the two-spotted spider mite, both economically important pests, may share the same plant. Therefore, an important question arises as to how plants integrate signals induced by dual herbivore attack into the optimal defensive response. We showed that regardless of which attacker was first, 24 h of infestation allowed for efficient priming of the Arabidopsis defense, which decreased the reproductive performance of one of the subsequent herbivores. The expression analysis of several defense-related genes demonstrated that the individual impact of mite and aphid feeding spread systematically, engaging the salicylic acid (SA) and jasmonic acid (JA) signaling pathways. Interestingly, aphids feeding on the systemic leaf of the plant simultaneously attacked by mites, efficiently reduced the magnitude of the SA and JA activation, whereas mites feeding remotely increased the aphid-induced SA marker gene expression, while the JA-dependent response was completely abolished. We also indicated that the weaker performance of mites and aphids in double infestation essays might be attributed to aliphatic glucosinolates. Our report is the first to provide molecular data on signaling cross-talk when representatives of two distinct taxonomical classes within the phylum Arthropoda co-infest the same plant. View Full-Text
Keywords: Myzus persicae; Tetranychus urticae; co-infestation; local and systemic responses; reproduction performance Myzus persicae; Tetranychus urticae; co-infestation; local and systemic responses; reproduction performance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Kiełkiewicz, M.; Barczak-Brzyżek, A.; Karpińska, B.; Filipecki, M. Unravelling the Complexity of Plant Defense Induced by a Simultaneous and Sequential Mite and Aphid Infestation. Int. J. Mol. Sci. 2019, 20, 806.

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