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A Dual-Color Imaging System for Sugarcane Smut Fungus Sporisorium scitamineum

Meixin Yan1, Enping Cai2, Jianuan Zhou3

  • 1Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, P. R. China, and Biotechnology Research Institute, Guangxi Academy of Agricultural Sciences, Guangxi, P. R. China.

Plant Disease
|January 29, 2019
PubMed

Insights

Researchers tagged sugarcane smut fungus (Sporisorium scitamineum) mating types with fluorescent proteins. This dual-color system successfully tracked fungal development, including mating and meiosis, aiding future pathogenesis studies.

Area of Science:

  • Plant Pathology
  • Mycology
  • Molecular Biology

Background:

  • Sugarcane smut, caused by Sporisorium scitamineum, is a significant agricultural disease.
  • Understanding the fungal life cycle is crucial for developing effective control strategies.
  • The sexual reproduction and meiotic processes of S. scitamineum are complex and not fully elucidated.

Purpose of the Study:

  • To develop a dual-color imaging system to monitor the life cycle of Sporisorium scitamineum.
  • To visualize and characterize key developmental stages, including mating, dikaryotic hyphae formation, and meiosis.
  • To establish a tool for investigating factors influencing fungal pathogenesis.

Main Methods:

  • Expressing green fluorescent protein (GFP) in MAT-1 and red fluorescent protein (RFP) in MAT-2 mating types of S. scitamineum.
  • Utilizing epifluorescence microscopy to observe fungal development after mating.
  • Analyzing fluorescent signals to confirm sexual reproduction and meiotic events.

Main Results:

  • Successful dual-color tagging of S. scitamineum sporidia with GFP and RFP.
  • Observation of conjugation tube formation and sporidia fusion within 4-8 hours post-mating.
  • Detection of dikaryotic filament formation at 12 hours and confirmation of meiosis in teliospores via fluorescent signals.

Conclusions:

  • Dual-color fluorescent tagging provides an effective method for studying the S. scitamineum life cycle.
  • This system allows for real-time monitoring of sexual mating and meiosis in this fungal pathogen.
  • The developed imaging system is a valuable tool for future research on sugarcane smut pathogenesis and control.

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