Pathogens pulling the strings: Effectors manipulating salicylic acid and phenylpropanoid biosynthesis in plants
Lander Bauters1, Boris Stojilković1, Godelieve Gheysen1
1Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.
Molecular Plant Pathology
|August 20, 2021
Summary
Pathogens secrete effectors to manipulate plant defenses, specifically targeting salicylic acid (SA) and phenylpropanoid levels. This review explores pathogen strategies to disrupt these crucial plant immune pathways, increasing host susceptibility.
Area of Science:
- Plant pathology
- Plant biochemistry
- Molecular plant-microbe interactions
Background:
- Plants utilize phytohormones like salicylic acid (SA) and secondary metabolites, particularly phenylpropanoids, for robust defense against pathogens.
- Pathogen-derived effectors are crucial virulence factors that target host pathways to facilitate infection.
- Understanding plant immune signaling and pathogen counter-strategies is vital for agricultural resilience.
Purpose of the Study:
- To review the diverse strategies employed by plant pathogens to interfere with salicylic acid (SA) and phenylpropanoid metabolism.
- To elucidate how pathogens manipulate these key plant defense compounds to enhance host susceptibility.
- To highlight the intricate molecular interplay between plants and pathogens during infection.
Main Methods:
- Literature review of existing research on plant immunity and pathogen effectors.
- Analysis of molecular mechanisms by which effectors target SA and phenylpropanoid pathways.
- Synthesis of information on pathogen-induced alterations in plant defense signaling.
Main Results:
- Pathogens secrete effectors that actively suppress SA biosynthesis and signaling.
- Effectors can also disrupt the phenylpropanoid pathway, reducing the production of defense compounds.
- These targeted disruptions compromise the plant's overall immune capacity, favoring pathogen establishment.
Conclusions:
- Pathogen effectors represent a sophisticated evolutionary adaptation to overcome plant defenses.
- Manipulating SA and phenylpropanoid pathways is a common and effective strategy for pathogens.
- Further research into these interactions can inform the development of novel disease-resistance strategies in crops.
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