Effects of cryopreservation on viability and functional stability of an industrially relevant alga
| Autor: | María Huete-Ortega, Seetharaman Vaidyanathan, Rahul Vijay Kapoore, Michele S. Stanley, Stephen P. Slocombe, Katarzyna Okurowska, John G. Day |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Cryopreservation Multidisciplinary Cell Survival Genetic stability lcsh:R lcsh:Medicine Biology Contamination Pulp and paper industry Article Cold Temperature 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Untreated control Genetic resources Functional stability Freezing lcsh:Q lcsh:Science Chlorella vulgaris 030217 neurology & neurosurgery |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-12 (2019) |
| ISSN: | 2045-2322 |
| Popis: | As algal biotechnology develops, there is an increasing requirement to conserve cultures without the cost, time and genetic stability implications of conventional serial transfers, including issues regarding potential loss by failure to regrow, contamination on transfer, mix up and/or errors in the documentation on transfer. Furthermore, it is crucial to ensure both viability and functionality are retained by stored stock-cultures. Low temperature storage, ranging from the use of domestic freezers to storage under liquid nitrogen, is widely being used, but the implication to stability and function rarely investigated. We report for the first time, retention of functionality in the maintenance of master stock-cultures of an industrially relevant, lipid-producing alga, under a variety of cryopreservation regimes. Storage in domestic (−15 °C), or conventional −80 °C freezers was suboptimal, with a rapid reduction in viability observed for samples at −15 °C and a >50% loss of viability, within one month, for samples stored at −80 °C. No reduction in viability occurred at −196 °C. Post-thaw culture functional performance was also influenced by the cryopreservation approach employed. Only samples held at −196 °C responded to nitrogen limitation in terms of growth characteristics and biochemical profiles (lipid production and chlorophyll a) comparable to the untreated control, cultured prior to cryopreservation. These results have important implications in microbial biotechnology, especially for those responsible for the conservation of genetic resources. |
| Databáze: | OpenAIRE |
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