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An evolutionary hourglass of herbivore-induced transcriptomic responses in Nicotiana attenuata

Matthew Durrant, Justin Boyer, Ian T. Baldwin, View ORCID ProfileShuqing Xu
doi: https://doi.org/10.1101/034603
Matthew Durrant
1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Germany.
2Brigham Young University, USA.
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Justin Boyer
1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Germany.
2Brigham Young University, USA.
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Ian T. Baldwin
1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Germany.
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Shuqing Xu
1Department of Molecular Ecology, Max Planck Institute for Chemical Ecology, Germany.
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  • ORCID record for Shuqing Xu
  • For correspondence: sxu@ice.mpg.de
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Abstract

Herbivore induced defences are robust, evolve rapidly and activated in plants when specific elicitors, frequently found in the herbivores’ oral secretions (OS) are introduced into wounds during attack. How these complex induced defences evolve remains unclear. Here, we show that herbivore-induced transcriptomic responses in a wild tobacco, Nicotiana attenuata, display an evolutionary hourglass: the pattern that characterises the transcriptomic evolution of embryogenesis in animals, plants, and fungi. While relatively young and rapidly evolving genes involved in signal perception and processing to regulate defence metabolite biosynthesis are recruited both early (1 h) and late (9-21 h) in the defence elicitation process, a group of highly conserved and older genes involved in transcriptomic regulation are activated in the middle stage (5 h). The appearance of the evolutionary hourglass architecture in both developmental and defence elicitation processes may reflect the importance of robustness and evolvability in the signalling of these important biological processes.

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Posted March 07, 2016.
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An evolutionary hourglass of herbivore-induced transcriptomic responses in Nicotiana attenuata
Matthew Durrant, Justin Boyer, Ian T. Baldwin, Shuqing Xu
bioRxiv 034603; doi: https://doi.org/10.1101/034603
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An evolutionary hourglass of herbivore-induced transcriptomic responses in Nicotiana attenuata
Matthew Durrant, Justin Boyer, Ian T. Baldwin, Shuqing Xu
bioRxiv 034603; doi: https://doi.org/10.1101/034603

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