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


Wulf, KE and Reid, JB and Foo, E, Auxin transport and stem vascular reconnection - has our thinking become canalised?, Annals of Botany, 123, (3) pp. 429-439. ISSN 0305-7364 (2019) [Refereed Article]

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Copyright The Author(s) 2018

DOI: doi:10.1093/aob/mcy180


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 Details

Item Type:Refereed Article
Keywords:auxin, grafting, canalisation, vascular development
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Environmentally sustainable plant production
Objective Field:Environmentally sustainable plant production not elsewhere classified
UTAS Author:Wulf, KE (Miss Kate Wulf)
UTAS Author:Reid, JB (Professor Jim Reid)
UTAS Author:Foo, E (Associate Professor Eloise Foo)
ID Code:128180
Year Published:2019 (online first 2018)
Funding Support:Australian Research Council (FT140100770)
Web of Science® Times Cited:4
Deposited By:Plant Science
Deposited On:2018-09-06
Last Modified:2020-06-24
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