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

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Wulf, KE, Reid, JB ORCID: 0000-0003-4317-0977 and Foo, E ORCID: 0000-0002-9751-8433 2018 , 'Auxin transport and stem vascular reconnection - has our thinking become canalised?' , Annals of Botany, vol. 123, no. 3 , pp. 429-439 , doi: 10.1093/aob/mcy180.

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Abstract

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.

Item Type: Article
Authors/Creators:Wulf, KE and Reid, JB and Foo, E
Keywords: auxin, grafting, canalisation, vascular development
Journal or Publication Title: Annals of Botany
Publisher: Oxford Univ Press
ISSN: 0305-7364
DOI / ID Number: 10.1093/aob/mcy180
Copyright Information:

Copyright The Author(s) 2018

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