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Published on: May 21, 2019
Nitric oxide function and signalling in plant disease resistance
Jeum Kyu Hong1, Byung-Wook Yun, Jeong-Gu Kang
1Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, King's Buildings, Edinburgh EH9 3JR, UK.
Journal of Experimental Botany
|November 28, 2007
Summary
Nitric oxide (NO) is a crucial gaseous signal in plants, regulating growth, development, and disease resistance. This molecule plays a key role in plant-pathogen interactions, influencing cell death and defense pathways.
Area of Science:
- Plant biology
- Molecular signaling
Background:
- Nitric oxide (NO) is a gaseous signaling molecule previously known for its role in animal physiology.
- NO's function in plants, particularly in growth, development, and environmental responses, is an emerging area of research.
Purpose of the Study:
- To explore the multifaceted roles of nitric oxide in plant cellular activities.
- To elucidate the involvement of NO in plant-pathogen interactions and disease resistance mechanisms.
Main Methods:
- Investigated NO's role in hypersensitive cell death during plant-pathogen interactions.
- Examined the regulation of metacaspase activity by NO.
- Analyzed NO's influence on the salicylic acid (SA) signaling pathway via S-nitrosylation.
Main Results:
- NO collaborates with reactive oxygen species to mediate plant cell death in response to pathogens.
- NO regulates metacaspases, proteases linked to programmed cell death in plants.
- NO modulates the salicylic acid (SA) pathway through S-nitrosylation, contributing to disease resistance.
Conclusions:
- Nitric oxide is a vital signaling molecule in plants, essential for orchestrating responses to pathogens.
- NO integrates with other signaling pathways, like SA, to mount effective plant defense.
- Understanding NO's biosynthesis and function is critical for enhancing plant disease resistance.
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