International Moss Stock Center
The International Moss Stock Center (IMSC) is a biorepository which is specialized in collecting, preserving and distributing moss plants of a high value of scientific research. The IMSC is located at the Faculty of Biology, Department of Plant Biotechnology, at the Albert-Ludwigs-University of Freiburg, Germany.
The moss collection of the IMSC currently includes various ecotypes of Physcomitrella patens, Physcomitrium and Funaria as well as several transgenic and mutant lines of Physcomitrella patens, including knockout mosses.
The long-term storage of moss samples in the IMSC is carried out via cryopreservation in the gas phase of liquid nitrogen at temperatures below -135°C in special freezer containers. It has been shown for Physcomitrella patens that the regeneration rate after cryopreservation is 100%.
- Schulte, J., R. Reski (2004): High-throughput cryopreservation of 140,000 Physcomitrella patens mutants. Plant Biology 6, 119-127. 
- Website International Moss Stock Center (IMSC) Freiburg
- Website Chair Plant Biotechnology, University of Freiburg
- Website Centre for Biological Signalling Studies (bioss)
- Sciencedaily: Mosses, deep frozen
- BIOPRO "A small moss turns professional"