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  Evidence of an evolutionary hourglass pattern in herbivory-induced transcriptomic responses

Durrant, M., Boyer, J., Zhou, W., Baldwin, I. T., & Xu, S. (2017). Evidence of an evolutionary hourglass pattern in herbivory-induced transcriptomic responses. New Phytologist, 215(3), 1264-1273. doi:10.1111/nph.14644.

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http://dx.doi.org/10.1111/nph.14644 (Publisher version)
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 Creators:
Durrant, Matthew1, Author              
Boyer, Justin1, Author              
Zhou, Wenwu1, Author              
Baldwin, Ian Thomas1, Author              
Xu, Shuqing1, Author              
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1Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society, ou_24029              

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 Abstract: Herbivory-induced defenses are specific and activated in plants when elicitors, frequently found in the herbivores’ oral secretions, are introduced into wounds during attack. While complex signaling cascades are known to be involved, it remains largely unclear how natural selection has shaped the evolution of these induced defenses. We analyzed herbivory-induced transcriptomic responses in wild tobacco, Nicotiana attenuata, using a phylotranscriptomic approach that measures the origin and sequence divergence of herbivory-induced genes. Highly conserved and evolutionarily ancient genes of primary metabolism were activated at intermediate time points (2–6 h) after elicitation, while less constrained and young genes associated with defense signaling and biosynthesis of specialized metabolites were activated at early (before 2 h) and late (after 6 h) stages of the induced response, respectively – a pattern resembling the evolutionary hourglass pattern observed during embryogenesis in animals and the developmental process in plants and fungi. The hourglass patterns found in herbivory-induced defense responses and developmental process are both likely to be a result of signaling modularization and differential evolutionary constraints on the modules involved in the signaling cascade.

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 Dates: 2017-04-282017-06-152017-07
 Publication Status: Published in print
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 Identifiers: Other: ITB551
DOI: 10.1111/nph.14644
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Title: New Phytologist
  Other : New Phytol.
Source Genre: Journal
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Publ. Info: London : Academic Press.
Pages: - Volume / Issue: 215 (3) Sequence Number: - Start / End Page: 1264 - 1273 Identifier: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695