Oukarroum A El Gharous M Strasser RJ 2017 Parmelina tiliacea lichens kept in the wet and dry state were stored in liquid nitrogen for 1 week and the subsequent recovery of their photosynthetic apparatus was followed. The chlorophyll a fluorescence rise and the maximum quantum yield of primary photochemistry φPo (FV/FM) were analysed for this purpose. Storage of wet thalli for 1 week in liquid nitrogen led to an impairment of photosystem II and probably the photosynthetic apparatus as a whole, from which the thalli did not recover over time. Thalli exposed in the dry state thalli were far less affected by the treatment and recovered well. These results indicate that the thalli are extremely tolerant to liquid nitrogen temperatures only in the dry state. application/pdf https://sonar.ch/global/documents/76526 eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cryobiol.2016.12.005 info:eu-repo/semantics/altIdentifier/pmid/27988167 info:eu-repo/semantics/openAccess Cryobiology. - 2017 Chlorophyll a fluorescence rise Dry and wet state Liquid nitrogen Parmelina tiliacea Chlorophyll Chlorophyll A Cold Temperature Nitrogen Parmeliaceae Photochemistry Photosynthesis Photosystem II Protein Complex Does Parmelina tiliacea lichen photosystem II survive at liquid nitrogen temperatures? http://purl.org/coar/resource_type/c_6501