Rapid protocol for visualization of rust fungi structures using fluorochrome Uvitex 2B

Area of Science:

• Plant Pathology
• Mycology
• Microscopy

Background:

• Histological examination with fluorochromes is standard for observing microorganisms in tissues.
• Studying unculturable fungi like biotrophic fungi requires histological methods to understand host-parasite interactions.
• Fluorochrome Uvitex 2B and fluorescence microscopy are used for studying rust fungi and host-pathogen interactions.

Purpose of the Study:

• To develop a rapid staining protocol for the rust fungus Puccinia triticina using fluorochrome Uvitex 2B.
• To compare the efficacy of the new rapid protocol with a standard staining technique.
• To observe in planta fungal infection structure development during wheat-Puccinia triticina interaction.

Main Methods:

• Development of a rapid staining protocol using fluorochrome Uvitex 2B.
• Pre-heating the Uvitex 2B stain during the rapid protocol.
• Comparison of the rapid protocol with a standard staining technique for observing fungal infection structures.

Main Results:

• The rapid protocol is equally or more efficient than the standard procedure in detecting fungal infection structures.
• Pre-heating the stain enhances detection of all infection structures, including haustoria.
• The rapid staining procedure significantly reduces background noise from plant tissue.

Conclusions:

• A simple and quick staining process for rust fungi was developed.
• The new protocol is six times faster than the standard Uvitex 2B staining procedure, completing in 4 hours.
• This rapid method aids in understanding host-parasite interactions by efficiently visualizing fungal structures.