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Hormone activities and the cell cycle machinery in immunity-triggered growth inhibition

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Reitz, M. U., Gifford, Miriam L. and Schäfer, Patrick (2015) Hormone activities and the cell cycle machinery in immunity-triggered growth inhibition. Journal of Experimental Botany, 66 (8). pp. 2187-2197. doi:10.1093/jxb/erv106

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Official URL: http://dx.doi.org/10.1093/jxb/erv106

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Abstract

Biotic stress and diseases caused by pathogen attack pose threats in crop production and significantly reduce crop yields. Enhancing immunity against pathogens is therefore of outstanding importance in crop breeding. However, this must be balanced, as immune activation inhibits plant growth. This immunity-coupled growth trade-off does not support resistance but is postulated to reflect the reallocation of resources to drive immunity. There is, however, increasing evidence that growth–immunity trade-offs are based on the reconfiguration of hormone pathways, shared by growth and immunity signalling. Studies in roots revealed the role of hormones in orchestrating growth across different cell types, with some hormones showing a defined cell type-specific activity. This is apparently highly relevant for the regulation of the cell cycle machinery and might be part of the growth–immunity cross-talk. Since plants are constantly exposed to Immuno-activating microbes under agricultural conditions, the transition from a growth to an immunity operating mode can significantly reduce crop yield and can conflict our efforts to generate next-generation crops with improved yield under climate change conditions. By focusing on roots, we outline the current knowledge of hormone signalling on the cell cycle machinery to explain growth trade-offs induced by immunity. By referring to abiotic stress studies, we further introduce how root cell type-specific hormone activities might contribute to growth under immunity and discuss the feasibility of uncoupling the growth–immunity cross-talk.

Item Type: Journal Article
Divisions: Faculty of Science > Life Sciences (2010- )
Journal or Publication Title: Journal of Experimental Botany
Publisher: OUP
ISSN: 0022-0957
Official Date: April 2015
Dates:
DateEvent
April 2015Published
28 March 2015Available
19 February 2015Accepted
16 October 2014Submitted
Volume: 66
Number: 8
Page Range: pp. 2187-2197
DOI: 10.1093/jxb/erv106
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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