Rewiring of jasmonate and phytochrome B signalling uncouples plant growth-defense tradeoffs

Marcelo L. Campos, Yuki Yoshida, Ian T. Major, Dalton de Oliveira Ferreira, Sarathi M. Weraduwage, John E. Froehlich, Brendan F. Johnson, David M. Kramer, Georg Jander, Thomas D. Sharkey and Gregg A. Howe ()
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Marcelo L. Campos: Department of Energy-Plant Research Laboratory
Yuki Yoshida: Department of Energy-Plant Research Laboratory
Ian T. Major: Department of Energy-Plant Research Laboratory
Dalton de Oliveira Ferreira: Department of Energy-Plant Research Laboratory
Sarathi M. Weraduwage: Department of Energy-Plant Research Laboratory
John E. Froehlich: Department of Energy-Plant Research Laboratory
Brendan F. Johnson: Department of Energy-Plant Research Laboratory
David M. Kramer: Department of Energy-Plant Research Laboratory
Georg Jander: Boyce Thompson Institute for Plant Research
Thomas D. Sharkey: Michigan State University
Gregg A. Howe: Department of Energy-Plant Research Laboratory

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Plants resist infection and herbivory with innate immune responses that are often associated with reduced growth. Despite the importance of growth-defense tradeoffs in shaping plant productivity in natural and agricultural ecosystems, the molecular mechanisms that link growth and immunity are poorly understood. Here, we demonstrate that growth-defense tradeoffs mediated by the hormone jasmonate are uncoupled in an Arabidopsis mutant (jazQ phyB) lacking a quintet of Jasmonate ZIM-domain transcriptional repressors and the photoreceptor phyB. Analysis of epistatic interactions between jazQ and phyB reveal that growth inhibition associated with enhanced anti-insect resistance is likely not caused by diversion of photoassimilates from growth to defense but rather by a conserved transcriptional network that is hardwired to attenuate growth upon activation of jasmonate signalling. The ability to unlock growth-defense tradeoffs through relief of transcription repression provides an approach to assemble functional plant traits in new and potentially useful ways.

Date: 2016
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DOI: 10.1038/ncomms12570

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