How the Apple Scab Fungus Interacts with Apple Leaves
Author Information
Author(s): Ulrike Steiner, Erich-Christian Oerke
Primary Institution: Institute of Crop Science and Resource Conservation—Plant Pathology, Rheinische Friedrich-Wilhelms-Universitaet Bonn, Germany
Hypothesis
Does the hemibiotrophic fungus Venturia inaequalis induce a biotrophic interface without a necrotrophic stage?
Conclusion
The study found that Venturia inaequalis maintains a strictly biotrophic lifestyle on apple leaves, lacking a necrotrophic stage.
Supporting Evidence
- V. inaequalis grows subcuticularly without killing host cells.
- The fungus modifies host cells to facilitate nutrient flow.
- Microscopic evidence shows a biotrophic interface with no necrotrophic stage.
- Enzymatic activity is localized to cuticle penetration.
- Fungal structures increase the surface area for nutrient uptake.
Takeaway
The apple scab fungus sticks to the surface of apple leaves and takes nutrients without killing the plant cells.
Methodology
The study used light microscopy, scanning electron microscopy, and transmission electron microscopy to investigate the host-pathogen interface.
Limitations
The study did not explore the long-term effects of the fungus on apple trees beyond the immediate infection period.
Participant Demographics
Apple seedlings of Malus × domestica, specifically Golden Delicious and Cripps Pink cultivars.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website