Journal
PLANT SIGNALING & BEHAVIOR
Volume 5, Issue 4, Pages 393-396Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.5.4.10793
Keywords
biotic stress; chloroplasts; flavodoxin; hypersensitive response (HR); reactive oxygen species (ROS); ROS signaling
Categories
Funding
- National Agency for the Promotion of Science and Technology (ANPCyT, Argentina)
- National Research Council (CONICET, Argentina)
- German Academic Exchange Service (DAAD, Germany)
- Leibniz-Institute of Plant Genetics and Crop Plant Research (Leibniz-IPK)
- German Research Foundation (DFG)
- European Molecular Biology Organization (EMBO, European Union)
Ask authors/readers for more resources
Plants generally react to the attack of non-host and incompatible host microorganisms by inducing pathogenesis-related (PR) genes and localised cell death (LCD) at the site of infection, a process collectively known as the hypersensitive response (HR). Reactive oxygen species (ROS) are generated in various sub-cellular compartments shortly after pathogen recognition, and proposed to cue subsequent orchestration of the HR. Although apoplast-associated ROS production by plasma membrane NADPH oxidases have been most thoroughly studied, recent observations suggest that ROS are generated in chloroplasts earlier in the response and play a key role in execution of LCD. A model is presented in which the initial outcome of successful pathogen detection is ROS accumulation in plastids, likely mediated by mitogen-activated protein kinases and caused by dysfunction of the photosynthetic electron transport chain. ROS signaling is proposed to spread from plastids to the apoplast, through the activation of NADPH oxidases, and from there to adjacent cells, leading to suicidal death in the region of attempted infection.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available