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Updated: Jul 8, 2025
07:44
Measuring Microbial Mutation Rates with the Fluctuation Assay
Published on: November 28, 2019
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Bacterial Mutation During Seasonal Epidemics.
Anuj Sharma1,2, Sujan Timilsina1, Peter Abrahamian2
1Department of Plant Pathology, University of Florida, Gainesville, FL, U.S.A.
Molecular Plant-Microbe Interactions : MPMI
|December 17, 2023
Summary
Bacterial pathogens like Xanthomonas perforans rapidly mutate during plant disease epidemics. This study quanties mutation rates in tomato fields, providing a benchmark for managing evolving bacterial plant diseases.
Area of Science:
- Plant pathology
- Microbial genetics
- Evolutionary biology
Background:
- Bacterial pathogens present significant challenges for sustainable agriculture.
- Understanding pathogen evolution is crucial for effective disease management strategies.
Purpose of the Study:
- To investigate the types and mutation rates of bacterial populations during seasonal disease epidemics.
- To establish a benchmark for bacterial mutation rates in host-associated environments.
Main Methods:
- Two distinct strains of Xanthomonas perforans were marked and released into tomato fields.
- Bacterial isolates were recaptured throughout the growing season.
- Whole-genome sequencing and comparative analysis were used to identify genomic variations.
Main Results:
- A total of 180 unique variations were identified across 300 sequenced genomes.
- Variations included substitutions, insertions/deletions, and structural changes.
- The host-associated mutation rate was estimated between 0.3 and 0.9 mutations per genome per week.
Conclusions:
- The study provides a quantitative measure of bacterial mutation rates in a pathosystem.
- These findings are valuable for predicting pathogen evolution and developing long-term disease management plans.
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