When storing microalgae in glycerol stocks for long-term purposes, a commonly used glycerol concentration is 10-20% (v/v). This concentration helps to protect the microalgae cells and preserve their viability during freezing and storage at -80°C.
Here are a couple of references that discuss the use of glycerol stocks for microalgae preservation:
Pignolet, O., Jubeau, S., Vaca-Garcia, C., & Michaud, P. (2013). Highly efficient cryopreservation of microalgae using solid cryoprotective media. Bioresource Technology, 149, 432-440. doi: 10.1016/j.biortech.2013.09.057
Day, J. G., Slocombe, S. P., & Stanley, M. S. (2012). Overcoming biological constraints to enable the exploitation of microalgae for biofuels. Bioresource Technology, 109, 245-251. doi: 10.1016/j.biortech.2012.04.088
These references provide insights into the cryopreservation and storage of microalgae using glycerol stocks. They discuss the optimal glycerol concentrations and techniques for maintaining the viability of microalgae during long-term storage at low temperatures.
Additionally, you may want to read some of my publications
Technical Report Algae Strain Identification for Wastewater Treatment
Article Using Microalgae for Treating Wastewater
Poster Reaction Energy: Fueling tomorrow
Technical Report Sustainable Future With Green Technolgy
Technical Report How to develop Green Culture with Sustainable actions for Cl...