AtWRKY15 perturbation abolishes the mitochondrial stress response that steers osmotic stress tolerance in Arabidopsis

Sammanfattning

Environmental stresses adversely affect plant growth and development. A common theme within these adverse conditions is the perturbation of reactive oxygen species (ROS) homeostasis. Here, we demonstrate that the ROS-inducible Arabidopsis thaliana WRKY15 transcription factor (AtWRKY15) modulates plant growth and salt/osmotic stress responses. By transcriptome profiling, a divergent stress response was identified in transgenic WRKY15-overexpressing plants that linked a stimulated endoplasmic reticulum-to-nucleus communication to a disrupted mitochondrial stress response under salt-stress conditions. We show that mitochondrial calcium-flux sensing might be important for regulating an active mitochondrial retrograde signaling and launching an appropriate defense response to confer salt-stress tolerance.

Nyckelord

abiotic stress signaling; cell expansion; microarray; hydrogen peroxide

Publicerad i

Proceedings of the National Academy of Sciences
2012, volym: 109, nummer: 49, sidor: 20113-20118
Utgivare: NATL ACAD SCIENCES

SLU författare

• Mühlenbock, Per

  • Universiteit Gent

UKÄ forskningsämne

Botanik

Publikationens identifierare

• DOI: https://doi.org/10.1073/pnas.1217516109

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/41168