Visualizing Dolichogenidea gelechiidivoris parasitism within Tuta absoluta larvae through fluorescence microscopy in...

Area of Science:

• Entomology
• Developmental Biology
• Microscopy

Background:

• Tissue opacity limits detailed anatomical studies of host-parasitoid interactions.
• Traditional histological dissection is time-consuming and may damage delicate structures.

Purpose of the Study:

• To present novel protocols for visualizing host-parasitoid internal anatomy using tissue clarification and 3D fluorescence microscopy.
• To enable detailed three-dimensional analysis of endoparasitoid development within host insects.

Main Methods:

• Tissue clarification using 1-propanol/ECi and 1-propanol/BABB protocols.
• 3D volumetric fluorescence microscopy, including laser scanning confocal microscopy and light sheet fluorescence microscopy.
• Autofluorescence visualization of internal structures in Tuta absoluta and Dolichogenidea gelechiidivoris.

Main Results:

• Successful visualization of the internal anatomy of Tuta absoluta and its endoparasitoid Dolichogenidea gelechiidivoris.
• Determination of the 3D position, orientation, size, and morphology of D. gelechiidivoris at various developmental stages within the host.
• Preservation of the overall morphological context due to the minimally invasive nature of the methods.

Conclusions:

• The developed protocols offer a non-destructive alternative to traditional methods for studying host-parasitoid relationships.
• These techniques provide a foundation for deeper understanding of parasitism and host-parasitoid interactions.
• The methods are applicable to other species, broadening their utility in biological research.