Freezing temperature effects on photosystem II in Antarctic lichens evaluated by chlorophyll fluorescence
| Authors | |
|---|---|
| Year of publication | 2024 |
| Type | Article in Periodical |
| Magazine / Source | Journal of Plant Physiology |
| MU Faculty or unit | |
| Citation | |
| web | článek dostupný na tomto linku |
| Doi | http://dx.doi.org/10.1016/j.jplph.2024.154192 |
| Keywords | Chlorophyll fluorescence; Linear cooling; Antarctic lichens; Kautsky kinetic; Freezing tolerance; Photosynthesis |
| Attached files | |
| Description | This study explores and compares the limits for photosynthesis in subzero temperatures of six Antarctic lichens: Sphaerophorus globosus, Caloplaca regalis, Umbilicaria antarctica, Pseudephebe minuscula, Parmelia saxatilis and Lecania brialmontii combining linear cooling and chlorophyll fluorescence methods. The results revealed triphasic S-curves in the temperature response of the maximum quantum yield (FV/FM) and effective quantum yield of photosystem II (?PSII) for all species. All investigated species showed a high level of cryoresistance with critical temperatures (Tc) below - 20 ?C. |
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