Combinatorially selected defense peptides protect plant roots from pathogen infection
Zhiwei David Fang1, James G Laskey, Shaoxing Huang
1Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA.
Summary
A novel peptide-delivery system enhances tomato root defense against pathogens. This strategy uses fused peptides to trigger pathogen encystment, significantly inhibiting infection and promoting sustainable agriculture.
Area of Science:
- Agricultural Science
- Plant Pathology
- Biotechnology
Background:
- Plant productivity faces constant threats from soil-borne pathogens.
- Current control methods rely on harmful biocides and fumigants.
- Developing sustainable, targeted pathogen control is crucial.
Purpose of the Study:
- To develop a rapid, pathogen-specific strategy for reducing root infections.
- To utilize a peptide-scaffold system for delivering defense attributes.
- To assess the efficacy of engineered peptides in deterring pathogen root colonization.
Main Methods:
- Defense peptides were fused to a maize cytokinin oxidase/dehydrogenase scaffold.
- The peptide-scaffold constructs were expressed in tomato roots.
- The accumulation and function of peptides in the rhizosphere were analyzed.
Main Results:
- Secreted peptide-scaffold constructs accumulated in the rhizosphere.
- These constructs induced premature encystment of Phytophthora capsici zoospores.
- Pathogen infection was significantly inhibited in engineered tomato roots.
Conclusions:
- The peptide-scaffold technology effectively deters pathogen root taxis.
- This approach offers a broadly applicable method for enhancing plant defense.
- It presents a sustainable alternative to conventional pathogen control strategies.
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