High-value chemicals from Botryococcus braunii and their current applications - A review

Area of Science:

• Biotechnology
• Microalgal Research
• Biochemistry

Background:

• Botryococcus braunii is a microalga recognized for its substantial production of extracellular hydrocarbons and polysaccharides.
• These compounds hold potential as biofuels, alternative feedstocks, and materials for polyester production and nanoparticle synthesis.
• The alga also synthesizes unique secondary carotenoids, such as botryoxanthins, not found in other microalgae.

Purpose of the Study:

• To explore the complex morphology, physiology, and cell wall structure of Botryococcus braunii.
• To investigate the mechanisms of cell growth and chemical secretion.
• To identify pathways for optimizing the economic production of high-value chemicals from B. braunii.

Main Methods:

• Analysis of Botryococcus braunii morphology and colony structure.
• Physiological studies of B. braunii.
• Investigation of metabolic pathways and chemical composition, including hydrocarbons, polysaccharides, and carotenoids.

Main Results:

• Botryococcus braunii yields significant hydrocarbons (botryococcenes, squalene) and exopolysaccharides.
• Unique secondary carotenoids, botryoxanthins, are present.
• Complex colony structure influences growth and secretion.

Conclusions:

• Understanding B. braunii's complex structure and metabolic pathways is crucial for optimizing high-value chemical production.
• Advanced culture systems and strain selection can improve economic viability.
• B. braunii represents a promising source for sustainable biofuels, bioplastics, and novel compounds.