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Liana Attachment to Supports Leads to Profound Changes in Xylem Anatomy and Cambium and Differentiating Xylem Transcriptional Profile
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  • André Carvalho Lima,
  • Sónia Cristina da Silva Andrade,
  • Caian Souza Gerolamo,
  • Diego Souza,
  • Luiz Lehmann Coutinho,
  • Magdalena Rossi,
  • Veronica Angyalossy
André Carvalho Lima
Universidade de Sao Paulo Instituto de Biociencias

Corresponding Author:andrec.lima@gmail.com

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Sónia Cristina da Silva Andrade
Universidade de Sao Paulo Instituto de Biociencias
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Caian Souza Gerolamo
Universidade de Sao Paulo Instituto de Biociencias
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Diego Souza
Universidade de Sao Paulo Instituto de Biociencias
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Luiz Lehmann Coutinho
Universidade de Sao Paulo Escola Superior de Agricultura Luiz de Queiroz
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Magdalena Rossi
Universidade de Sao Paulo Instituto de Biociencias
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Veronica Angyalossy
Universidade de Sao Paulo Instituto de Biociencias
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Abstract

Wood serves crucial functions in plants, yet our understanding of the molecular regulation governing the composition, arrangement, and dimensions of its cells remains limited. The abrupt change in wood anatomy of lianas represents an excellent model to address the underlying mechanism, although consistent triggering factors for this process remain uncertain. In this study we examined how physical support attachment impacts the development of lianescent xylem anatomy in Bignonia magnifica (Bignoniaceae), employing a comprehensive approach integrating detailed anatomical analysis with gene expression profiling of cambium and differentiating xylem. Our findings demonstrate that attachment to physical supports triggers the formation of lianescent xylem, leading to increased vessel size, range of vessel sizes, broader vessel distribution, reduced fiber content, and higher potential specific water conductivity. These shifts in wood anatomy coincide with the downregulation of genes associated with cell division and cell wall biosynthesis, and the upregulation of transcription factors (TFs), defense/cell death, and hormone-responsive genes in the lianescent xylem. Based on our results, we propose a model delineating the molecular control underlying the formation of lianescent xylem, revealing how the increased complexity of lianescent anatomy reflects a more intricate transcriptional regulatory network encompassing a more diverse repertoire of TFs and hormone-responsive genes.
29 Aug 2023Submitted to Plant, Cell & Environment
29 Aug 2023Submission Checks Completed
29 Aug 2023Assigned to Editor
02 Sep 2023Review(s) Completed, Editorial Evaluation Pending
05 Sep 2023Reviewer(s) Assigned
20 Oct 2023Editorial Decision: Revise Minor
15 May 20241st Revision Received
12 Jul 2024Submission Checks Completed
12 Jul 2024Assigned to Editor
12 Jul 2024Review(s) Completed, Editorial Evaluation Pending
15 Jul 2024Reviewer(s) Assigned
04 Aug 2024Editorial Decision: Accept