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Molecular interactions between the olive and the fruit fly Bactrocera oleae
Giandomenico Corrado1, Fiammetta Alagna, Mariapina Rocco
1Dipartimento di Scienze del Suolo, Pianta, Ambiente e Produzioni Animali, Universita' degli Studi di Napoli Federico II, Via Università 100, Portici, Napoli 80055, Italy.
BMC Plant Biology
|June 15, 2012
Summary
Olive fruit respond to the damaging olive fruit fly (Bactrocera oleae) by activating complex molecular defense pathways. This study identifies key genes and proteins involved in the olive-B. oleae interaction, revealing insights into drupe resistance mechanisms.
Area of Science:
- Plant-insect interactions
- Molecular plant pathology
- Olive fruit biology
Background:
- The olive fruit fly (Bactrocera oleae) is a major pest of olive crops, causing significant yield and quality losses.
- Understanding the molecular dialogue between olive fruit and B. oleae is crucial for developing effective control strategies.
Purpose of the Study:
- To investigate the molecular response of olive drupes to Bactrocera oleae infestation.
- To identify genes and proteins involved in the plant's defense mechanisms against this pest.
Main Methods:
- Transcriptomic analysis using Suppression Subtractive Hybridisation (SSH).
- Proteomic analysis using bi-dimensional electrophoresis and nanoLC-ESI-LIT-MS/MS.
- Validation of gene expression using real-time PCR.
Main Results:
- Identified 196 differentially expressed sequence tags (ESTs) and 26 protein spots in infested olives.
- Bioinformatic analysis revealed alterations in stress response, phytohormone signaling, and primary metabolism.
- Confirmed wound-inducible expression of Oe-chitinase I and Oe-PR27 genes upon B. oleae attack.
Conclusions:
- This study provides the first comprehensive molecular insight into the olive fruit's interaction with B. oleae.
- Olive drupe defense involves complex pathways including photosynthesis, reactive oxygen species (ROS) production, and direct defense compounds.
- Trypsin inhibitors are highlighted as potentially crucial for drupe resistance against phytophagous larvae.
