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  Sex ratio of mirid populations shifts in response to hostplant co-infestation or altered cytokinin signaling

Adam, N., Erler, T., Kallenbach, M., Kaltenpoth, M., Kunert, G., Baldwin, I. T., et al. (2017). Sex ratio of mirid populations shifts in response to hostplant co-infestation or altered cytokinin signaling. Journal of Integrative Plant Biology, 59(1), 44-59. doi:10.1111/jipb.12507.

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http://dx.doi.org/10.1111/jipb.12507 (Publisher version)
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 Creators:
Adam, Nora1, 2, Author              
Erler, Theresa1, Author              
Kallenbach, Mario1, Author              
Kaltenpoth, Martin3, Author              
Kunert, Grit4, Author              
Baldwin, Ian Thomas1, Author              
Schuman, Meredith C.1, Author              
Affiliations:
1Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society, ou_24029              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              
3Max Planck Research Group Insect Symbiosis, MPI for Chemical Ecology, Max Planck Society, ou_421897              
4Statistical Service, Dr. Grit Kunert, MPI for Chemical Ecology, Max Planck Society, ou_3171479              

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 Abstract: Herbivore species sharing a host plant often compete. In this study, we show that host plant-mediated interaction between two insect herbivores – a generalist and a specialist – results in a sex ratio shift of the specialist's offspring. We studied demographic parameters of the specialist Tupiocoris notatus (Hemiptera: Miridae) when co-infesting the host plant Nicotiana attenuata (Solanaceae) with the generalist leafhopper Empoasca sp. (Hemiptera: Cicadellidae). We show that the usually female-biased sex ratio of T. notatus shifts toward a higher male proportion in the offspring on plants co-infested by Empoasca sp. This sex ratio change did not occur after oviposition, nor is it due differential mortality of female and male nymphs. Based on pyrosequencing and PCR of bacterial 16S rRNA amplicons, we concluded that sex ratio shifts were unlikely to be due to infection with Wolbachia or other known sex ratio- distorting endosymbionts. Finally, we used transgenic lines of N. attenuata to evaluate if the sex ratio shift could be mediated by changes in general or specialized host plant metabolites. We found that the sex ratio shift occurred on plants deficient in two cytokinin receptors (irCHK2/3). Thus, cytokinin-regulated traits can alter the offspring sex ratio of the specialist T. notatus.

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 Dates: 2016-11-082016-11-142017
 Publication Status: Published in print
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 Identifiers: Other: ITB533
DOI: 10.1111/jipb.12507
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Title: Journal of Integrative Plant Biology
Source Genre: Journal
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Publ. Info: Beijing : Blackwell Publ. Asia Pty
Pages: - Volume / Issue: 59 (1) Sequence Number: - Start / End Page: 44 - 59 Identifier: Other: 1672-9072
CoNE: https://pure.mpg.de/cone/journals/resource/1672-9072