Motility and Competitive Fitness of Photorhabdus luminescens in Insect Infection
Author Information
Author(s): Catherine A Easom, David J Clarke
Primary Institution: University College Cork, Ireland
Hypothesis
Motility plays a role in the interactions between Photorhabdus and its invertebrate hosts.
Conclusion
Motility contributes to the competitive fitness of Photorhabdus during insect infection, although it is not required for pathogenicity or mutualism.
Supporting Evidence
- Both ΔflgG and ΔmotAB mutants are out-competed by wild-type Photorhabdus during prolonged incubation in the insect.
- Motility is not required for pathogenicity but provides a fitness advantage during insect colonization.
- The production of flagella incurs a significant metabolic cost during growth on agar plates.
Takeaway
This study shows that while Photorhabdus bacteria don't need to move to infect insects, being able to move helps them survive better in the long run.
Methodology
Deletion mutants of flgG and motAB were constructed to study their effects on motility and competitive fitness in insect infection.
Limitations
The study did not investigate the role of chemotaxis in the interactions.
Statistical Information
P-Value
0.0065
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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