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Unveiling Metabolic Crosstalk: Bacillus-Mediated Defense Priming in Pine Needles Against Pathogen Infection
Quan Yang1,2,3,4, Anqi Niu1,2,3,4, Shuang Li1,2,3,4
1Key Laboratory of National Forestry and Grassland Administration on Control of Artificial Forest Diseases and Pests in South China, Central South University of Forestry and Technology, Changsha 410004, China.
Metabolites
|December 27, 2024
Summary
Bacillus csuftcsp75 enhances pine needle defense against Diplodia pinea by boosting plant immune pathways. This PGPR treatment activates systemic acquired resistance (SAR) and induced systemic resistance (ISR), offering a sustainable biocontrol alternative.
Area of Science:
- Plant Pathology
- Microbiology
- Biochemistry
Background:
- Plant growth-promoting rhizobacteria (PGPR) are crucial for plant defense against pathogens.
- Bacillus species are recognized for their role in enhancing plant immunity.
Purpose of the Study:
- To investigate metabolic reprogramming in pine needles induced by Bacillus csuftcsp75.
- To evaluate Bacillus csuftcsp75 as a sustainable biocontrol agent against Diplodia pinea P9.
Main Methods:
- Liquid chromatography-mass spectrometry (LC-MS/MS) was used to analyze metabolic profiles.
- Principal component and cluster analyses assessed metabolic alterations in treated and control pine needles.
Main Results:
- Bacillus csuftcsp75 significantly altered pine needle metabolism.
- Increased metabolites in flavonoid biosynthesis, phenylpropanoid, and amino acid pathways were observed.
- Elevated levels of defense compounds like 5-hydroxytryptophol and oleanolic acid indicated enhanced resistance.
Conclusions:
- Bacillus csuftcsp75 effectively enhances pine needle defense against pathogen P9.
- Metabolic modulation activates key immune pathways, inducing systemic acquired resistance (SAR) and induced systemic resistance (ISR).
- This PGPR offers a natural, sustainable alternative to chemical pesticides in agriculture.
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