Microplate assay for colletotrichum spore production

Area of Science:

• Mycology
• Plant Pathology
• Biotechnology

Background:

• Accurate assessment of fungal spore production is vital for biological control strategies.
• Traditional methods for quantifying fungal sporulation can be time-consuming and resource-intensive.
• Developing efficient assays is key to optimizing fungal growth media.

Purpose of the Study:

• To devise a simple, rapid, and inexpensive microplate method for assaying spore production in Colletotrichum gloeosporioides.
• To compare the efficacy of the microplate assay with traditional liquid batch cultures for assessing fungal growth and sporulation.
• To identify optimal media conditions for maximizing conidia yield and minimizing mycelial growth.

Main Methods:

• Culturing Colletotrichum gloeosporioides on solid media within microplate wells.
• Comparing microplate assays with 100-ml liquid batch cultures across 11 different media.
• Evaluating fungal growth and spore production at 4 and 8 days post-inoculation.
• Assessing mycelial growth qualitatively and spore production quantitatively per unit volume.

Main Results:

• Microplate assays demonstrated comparable spore production per unit volume to liquid cultures.
• Qualitative assessment of mycelial growth on microplates correlated well with liquid culture results.
• V8 juice emerged as the most effective medium for spore production.
• An optimal organic content of approximately 6 mg/ml was identified for high sporulation and low mycelium biomass.

Conclusions:

• The microplate assay offers a convenient and effective tool for screening media for fungal conidia production.
• This method is suitable for large-scale screening, supporting applications like biological control.
• The findings provide valuable insights into optimizing media for Colletotrichum gloeosporioides sporulation.