Tetranychus urticae-triggered responses promote genotype-dependent conspecific repellence or attractiveness in citrus

The New Phytologist
Blas AgutVictor Flors

Abstract

The citrus rootstocks sour orange and Cleopatra mandarin display differential resistance against Tetranychus urticae. Sour orange plants support reduced oviposition, growth rates and damage compared with Cleopatra mandarin plants. Jasmonic acid signalling and flavonoid accumulation have been revealed as key mechanisms for the enhanced resistance of sour orange plants. In this study, we observed that the release of T. urticae herbivore-induced plant volatiles (HIPVs) from sour orange plants has a marked repellent effect on conspecific mites associated with the production of the terpenes α-ocimene, α-farnesene, pinene and d-limonene, and the green leaf volatile 4-hydroxy-4-methyl-2-pentanone. By contrast, T. urticae HIPVs from Cleopatra mandarin plants promote conspecific mite attraction associated with an increase in (2-butoxyethoxy) ethanol, benzaldehyde and methyl salicylate levels. HIPVs released from sour orange plants following T. urticae infestation induce resistance in Cleopatra mandarin plants, thereby reducing oviposition rates and stimulating the oxylipin biosynthetic gene lipoxygenase2 (LOX2). Cleopatra HIPVs do not affect the response to T. urticae of these rootstocks. We conclude that sour orange plants promote herb...Continue Reading

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Citations

Oct 17, 2015·Experimental & Applied Acarology·E Aguilar-FenollosaJ A Jaques
Jun 23, 2016·International Journal of Molecular Sciences·Lijuan WangMengzhu Lu
Jul 30, 2016·International Journal of Molecular Sciences·Mario NaselliMeritxell Pérez-Hedo
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Sep 1, 2017·Molecular Plant-microbe Interactions : MPMI·Cristina RiojaVojislava Grbic
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Apr 11, 2020·Plants·M Estrella SantamariaIsabel Diaz
Jun 27, 2017·Frontiers in Plant Science·M Estrella SantamaríaIsabel Diaz
Apr 24, 2018·Frontiers in Plant Science·M E SantamariaManuel Martinez
Oct 7, 2019·Journal of Economic Entomology·Bodil N CassJay A Rosenheim
Dec 31, 2020·Environmental Entomology·Rebecca A Schmidt-JeffrisBrian A Nault

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