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Auxin transport and stem vascular reconnection - has our thinking become canalised?

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posted on 2023-05-19, 21:03 authored by Kate WulfKate Wulf, James ReidJames Reid, Eloise FooEloise Foo

Background: The presence of a polar auxin transport stream has long been correlated with the differentiation and patterning of vascular cells across vascular plants. As our understanding of auxin transport and vascular development has grown, so too has evidence for the correlation between these processes. However, a clear understanding of the cellular and molecular mechanisms driving this correlation has not been elucidated.

Scope: This article examines the hypothesis that canalisation via polar auxin transport regulates vascular reconnection and patterning in the stem after wounding or grafting. We examine the evidence for the causal nature of the relationship and the suggested role that other hormones may play. Data are presented indicating that in grafted plants the degree of auxin transport may not always correlate with vascular reconnection. Furthermore, data on grafting success using plants with a range of hormone-related mutations indicate that these hormones may not be critical for vascular reconnection.

Conclusions: In the past, excellent work examining elements of auxin synthesis, transport and response in relation to vascular development has occurred. However, new experimental approaches are required to more directly test the hypothesis that auxin transport regulates stem vascular reconnection after wounding or grafting. This could include studies on the timing of the re-establishment of auxin transport and vascular reconnection after grafting and the influence of auxin transport mutants and inhibitors on these processes using live imaging.

Funding

Australian Research Council

History

Publication title

Annals of Botany

Volume

123

Pagination

429-439

ISSN

0305-7364

Department/School

School of Natural Sciences

Publisher

Oxford Univ Press

Place of publication

Great Clarendon St, Oxford, England, Ox2 6Dp

Rights statement

Copyright The Author(s) 2018

Repository Status

  • Restricted

Socio-economic Objectives

Environmentally sustainable plant production not elsewhere classified

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