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A Transcriptomic Analysis of Xylan Mutants Does Not Support the Existence of A Secondary Cell Wall Integrity System in Arabidopsis

Nuno Faria-Blanc, Jenny Mortimer, Paul Dupree
doi: https://doi.org/10.1101/246330
Nuno Faria-Blanc
University of Cambridge;
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Jenny Mortimer
Lawrence Berkeley National Laboratory
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Paul Dupree
University of Cambridge;
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  • For correspondence: p.dupree@bioc.cam.ac.uk
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Abstract

Yeast have long been known to possess a cell wall integrity (CWI) system, and recently an analogous system has been described for the primary walls of plants (PCWI) that leads to changes in plant growth and cell wall composition. A similar system has been proposed to exist for secondary cell walls (SCWI). However, there is little data to support this. Here, we analysed the stem transcriptome of a set of cell wall biosynthetic mutants in order to investigate whether cell wall damage, in this case caused by aberrant xylan synthesis, activates a signalling cascade or changes in cell wall synthesis gene expression. Our data revealed remarkably few changes to the transcriptome. We hypothesise that this is because cells undergoing secondary cell wall thickening have entered a committed programme leading to cell death, and therefore a SCWI system would have limited impact. The absence of transcriptomic responses to secondary cell wall alterations may facilitate engineering of the secondary cell wall of plants.

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The copyright holder for this preprint is the author/funder. It is made available under a CC-BY-NC-ND 4.0 International license.
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  • Posted January 10, 2018.

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A Transcriptomic Analysis of Xylan Mutants Does Not Support the Existence of A Secondary Cell Wall Integrity System in Arabidopsis
Nuno Faria-Blanc, Jenny Mortimer, Paul Dupree
bioRxiv 246330; doi: https://doi.org/10.1101/246330
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A Transcriptomic Analysis of Xylan Mutants Does Not Support the Existence of A Secondary Cell Wall Integrity System in Arabidopsis
Nuno Faria-Blanc, Jenny Mortimer, Paul Dupree
bioRxiv 246330; doi: https://doi.org/10.1101/246330

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