Filter paper degrading ability of a Trichoderma strain with multinucleate conidia

Area of Science:

• Biotechnology
• Microbiology
• Enzyme Engineering

Background:

• Trichoderma reesei is a fungus known for producing cellulolytic enzymes.
• Improving the efficiency of enzyme production is crucial for industrial applications like biofuel production and textile processing.
• Genetic modification and strain selection are key strategies to enhance enzyme activity.

Purpose of the Study:

• To develop a novel strain of Trichoderma reesei with enhanced filter paper degrading ability.
• To investigate the enzymatic properties of the modified strain.
• To assess the potential of the improved strain for industrial applications.

Main Methods:

• Multinucleate conidia were induced in Trichoderma reesei Rut C-30 using colchicine treatment.
• A double-layer selection medium was employed to screen for conidia with superior filter paper degrading capabilities.
• The selected strain (JS-2) was analyzed for its filter paper collapse time, reducing sugar production, and hydrolyzing activity against Avicel, CMC-Na, and Salicin.

Main Results:

• The selected strain, JS-2, demonstrated a significantly reduced filter paper collapse time (15 min) compared to the original strain (25 min).
• Strain JS-2 exhibited a higher yield of reducing sugar.
• Hydrolyzing activity against Avicel, CMC-Na, and Salicin increased by 2.1, 1.2, and 3.6 times, respectively, in strain JS-2 compared to the original strain.

Conclusions:

• Colchicine treatment and subsequent strain selection effectively enhanced the filter paper degrading ability of Trichoderma reesei.
• The JS-2 strain possesses superior enzymatic activity, making it a promising candidate for industrial applications requiring efficient cellulose hydrolysis.
• This study highlights the potential of targeted strain improvement for optimizing enzyme production in Trichoderma reesei.