Transcriptome profiling of Fraxinus excelsior genotypes infested by emerald ash borer

Area of Science:

• Forestry and Plant Pathology
• Molecular Biology and Genomics
• Entomology and Invasive Species Research

Background:

• European ash (Fraxinus excelsior) faces severe threats from Hymenoscyphus fraxineus and the emerald ash borer (EAB, Agrilus planipennis).
• EAB is spreading across Europe, posing a significant risk to F. excelsior populations.
• Understanding molecular resistance mechanisms in European ash against EAB is crucial for conservation.

Purpose of the Study:

• To investigate the molecular basis of resistance in European ash genotypes against the emerald ash borer.
• To identify differential gene expression patterns associated with EAB susceptibility and resistance.

Main Methods:

• Transcriptomic data was collected from European ash genotypes with varying EAB susceptibility.
• Gene expression profiles were analyzed in EAB-inoculated F. excelsior samples.
• Differential gene expression analysis was performed to compare resistant and susceptible genotypes.

Main Results:

• Significant differences in gene expression were observed between susceptible and resistant European ash genotypes following EAB infestation.
• Identified specific molecular traits and pathways involved in the response to EAB.

Conclusions:

• The study provides critical insights into the molecular mechanisms underlying European ash resistance to EAB.
• Findings will inform the development of management and conservation strategies for threatened European ash populations.
• This research is vital for protecting a culturally and ecologically important tree species.