New molecules in plant defence against pathogens
Laura Eccleston1, Alessandro Brambilla1, A Corina Vlot1,2
1Helmholtz Munich, Institute of Biochemical Plant Pathology, Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany.
Essays in Biochemistry
|June 1, 2022
Summary
Plants utilize complex immune signaling networks, including systemic acquired resistance (SAR), to defend against pathogens. Recent findings highlight novel signaling molecules and plant volatiles in modulating these crucial defense pathways.
Area of Science:
- Plant pathology
- Molecular biology
- Plant immunity
Background:
- Plants possess intricate immune signaling networks to combat pathogens.
- Systemic acquired resistance (SAR) and induced systemic resistance (ISR) are key plant defense mechanisms.
- Second messengers like calcium, ROS, and NO are vital for signal propagation in plant immunity.
Purpose of the Study:
- To review recent advancements in plant induced defense signaling.
- To focus on novel signaling molecules and their integration into defense networks.
- To explore the role of plant volatiles in modulating plant immunity.
Main Methods:
- Literature review of recent findings in plant defense signaling.
- Analysis of the roles of second messengers and signaling metabolites.
- Examination of plant volatile organic compounds (VOCs) in defense.
Main Results:
- Lysine-derived signals, pipecolic acid (Pip) and N-hydroxypipecolic acid (NHP), are key SAR metabolites.
- Plant volatiles, including monoterpenes, can promote SAR via ROS signaling.
- Both plant and microbial VOCs modulate salicylic acid and jasmonic acid pathways.
Conclusions:
- Induced defense signaling in plants is a complex, integrated network.
- Novel signaling molecules and plant volatiles represent promising targets for enhancing plant immunity.
- Understanding these pathways is crucial for developing sustainable agriculture strategies.
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