Pathogenic Process-Associated Transcriptome Analysis of Stemphylium lycopersici from Tomato
Dezhen Zhang1, Wenjuan Chi1, Cuicui Wang1
1Shandong Facility Horticulture Bioengineering Research Center, Weifang University of Science and Technology, Weifang 262700, China.
International Journal of Genomics
|May 31, 2022
Summary
This study reveals key genes and pathways in Stemphylium lycopersici, the fungus causing tomato gray leaf spot. Understanding these pathogenicity factors is crucial for developing control strategies against this devastating tomato disease.
Area of Science:
- Plant Pathology
- Molecular Biology
- Mycology
Background:
- Tomato gray leaf spot, caused by *Stemphylium lycopersici*, is a major foliar disease in China.
- The pathogenic mechanisms of *S. lycopersici* remain largely uncharacterized.
Purpose of the Study:
- To investigate the genetic basis of *S. lycopersici* pathogenicity in tomato.
- To identify key genes and pathways involved in the infection process.
Main Methods:
- Comparative transcriptomic analysis using RNA sequencing (RNA-seq).
- Analysis of gene expression during early infection and necrotrophic phases.
Main Results:
- Identified 1,642 and 1,875 upregulated genes during early infection and necrotrophic phases, respectively.
- Upregulated genes were enriched in pathways related to pectin degradation, adhesion, colonization, and structural molecule activity.
- Commonly upregulated genes involved signal regulation, cell wall degradation (hemicellulose, cellulose), and extracellular proteases.
Conclusions:
- Key pathogenicity factors for *S. lycopersici* include host surface adhesion, colonization, cell wall degradation, signal regulation, and survival mechanisms.
- Functional characterization of identified genes provides a resource for understanding the *S. lycopersici*-tomato pathosystem.
- Findings may facilitate the development of novel control strategies against tomato gray leaf spot.
