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Related Experiment Video

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Staining the Cytoplasmic Ca2+ with Fluo-4/AM in Apple Pulp

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Published on: November 6, 2021

The Apple Fruitlet Model System for Fire Blight Disease.

Sara M Klee¹, Judith P Sinn¹, Timothy W McNellis²

¹Department of Plant Pathology & Environmental Microbiology, The Pennsylvania State University, University Park, PA, USA.

Methods in Molecular Biology (Clifton, N.J.)

|May 2, 2019

Summary

Researchers propose using apple fruitlets as a model host for studying fire blight disease. This system facilitates genetic analysis of Erwinia amylovora and host resistance mechanisms.

Keywords:

Apple Disease rating scale Erwinia amylovora Fire blight Pathogenicity Virulence

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Area of Science:

Plant Pathology
Bacteriology
Genetics

Background:

Fire blight, caused by Erwinia amylovora, is a significant disease impacting global apple and pear production.
Effective management strategies and resistant cultivars are essential for controlling fire blight.
Current research is limited by the lack of a suitable model host for Erwinia amylovora due to host plant genetic complexity.

Purpose of the Study:

To establish apple fruitlets as a viable model host system for studying fire blight.
To develop a protocol for quantitative analysis of Erwinia amylovora infection in apple fruitlets.
To enable high-throughput genetic screens of Erwinia amylovora and investigate host-pathogen interactions.

Main Methods:

Development of a quantitative fruit inoculation protocol.
Measurement of bacterial growth within inoculated fruitlets.
Assessment of disease symptoms on apple fruitlets.

Main Results:

A reproducible protocol for inoculating and assessing fire blight in apple fruitlets was established.
This model system allows for quantitative measurement of bacterial proliferation.
The system is suitable for genetic screens of Erwinia amylovora mutants and studying host responses.

Conclusions:

Apple fruitlets offer a practical and effective model system for fire blight research.
This model facilitates molecular genetic analysis of Erwinia amylovora virulence.
It provides a valuable tool for understanding host resistance and plant-microbe interactions in fire blight.