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cis-Jasmone elicits aphid-induced stress signalling in potatoes

Sobhy, Islam S., Woodcock, Christine M., Powers, Stephen J., Caulfield, John C., Pickett, John and Birkett, Michael A. 2017. cis-Jasmone elicits aphid-induced stress signalling in potatoes. Journal of Chemical Ecology 43 (1) , pp. 39-52. 10.1007/s10886-016-0805-9

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Abstract

Elicitation of plant defense signaling that results in altered emission of volatile organic compounds (VOCs) offers opportunities for protecting plants against arthropod pests. In this study, we treated potato, Solanum tuberosum L., with the plant defense elicitor cis-jasmone (CJ), which induces the emission of defense VOCs and thus affects the behavior of herbivores. Using chemical analysis, electrophysiological and behavioral assays with the potato-feeding aphid Macrosiphum euphorbiae, we showed that CJ treatment substantially increased the emission of defense VOCs from potatoes compared to no treatment. Coupled GC-electroantennogram (GC-EAG) recordings from the antennae of M. euphorbiae showed robust responses to 14 compounds present in induced VOCs, suggesting their behavioral role in potato/aphid interactions. Plants treated with CJ and then challenged with M. euphorbiae were most repellent to alate M. euphorbiae. Principal component analysis (PCA) of VOC collections suggested that (E)-2-hexenal, (E,E)-4,8,12-trimethyl-1,3,7,11- tridecatetraene (TMTT), (E)-β-farnesene, (E)-4,8-dimethyl- 1,3,7-nonatriene (DMNT), methyl salicylate (MeSA), CJ, and methyl benzoate (MeBA) were the main VOCs contributing to aphid behavioral responses, and that production of TMTT, (E)-β-farnesene, CJ, and DMNT correlated most strongly with aphid repellency. Our findings confirm that CJ can enhance potato defense against aphids by inducing production of VOCs involved in aphid-induced signalling.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Publisher: Springer
ISSN: 0098-0331
Date of First Compliant Deposit: 22 November 2017
Date of Acceptance: 2 December 2016
Last Modified: 27 Nov 2017 11:53
URI: http://orca.cf.ac.uk/id/eprint/106901

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