Related Experiment Video
Updated: May 7, 2026
07:24
Production of Chemicals by Klebsiella pneumoniae Using Bamboo Hydrolysate as Feedstock
Published on: June 29, 2017
Exo-polygalacturonase production by Bacillus subtilis CM5 in solid state fermentation using cassava bagasse
Manas R Swain1, Shaktimay Kar, Ramesh C Ray
1Central Tuber Crops Research Institute (Regional Centre) , Bhubaneswar - 751019 , India.
Summary
Bacillus subtilis CM5 efficiently produces exo-polygalacturonase (exo-PG) using cassava bagasse in solid-state fermentation. Optimal conditions for enzyme production were identified as a 6-day incubation period, pH 7.0, 70% moisture, and 50°C.
Area of Science:
- Biotechnology
- Enzyme Engineering
- Microbial Fermentation
Background:
- Solid-state fermentation (SSF) offers an eco-friendly approach for enzyme production.
- Cassava bagasse presents a sustainable substrate for microbial processes.
- Exo-polygalacturonase (exo-PG) is a key enzyme in pectin degradation.
Purpose of the Study:
- To investigate the efficacy of Bacillus subtilis CM5 for exo-polygalacturonase (exo-PG) production.
- To optimize SSF conditions for enhanced exo-PG yield using cassava bagasse.
Main Methods:
- Solid-state fermentation (SSF) with Bacillus subtilis CM5.
- Response surface methodology (RSM) with Central Composite Design (CCD).
- Evaluation of incubation period, pH, moisture holding capacity (MHC), and temperature.
Main Results:
- Identified optimal incubation period: 6 days.
- Determined optimal initial medium pH: 7.0.
- Established optimal moisture holding capacity (MHC): 70%.
- Found optimal incubation temperature: 50°C.
Conclusions:
- Bacillus subtilis CM5 is a potent producer of exo-PG via SSF.
- Optimized parameters significantly enhance exo-PG production.
- Cassava bagasse is a viable substrate for industrial enzyme synthesis.
Related Concept Videos
01:25Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
01:18Production of Biopesticides
Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...
01:26Biosynthesis of Polysaccharides
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...