Freezing and desiccation tolerance in the Antarctic bangiophyte Pyropia endiviifolia (Rhodophyta): a chicken and egg problem? ...
Antarctic macroalgal communities of the upper intertidal zone are particularly poor compared with other coastal regions. Exposure to desiccation and freezing combined with the abrasive effect of ice threatens the life of sessile organisms. One of the few species able to colonize this environment is...
| Main Authors: | , , , , , , , , |
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| Format: | Dataset |
| Language: | unknown |
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Taylor & Francis
2022
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.6084/m9.figshare.21617817 https://tandf.figshare.com/articles/dataset/Freezing_and_desiccation_tolerance_in_the_Antarctic_bangiophyte_i_Pyropia_endiviifolia_i_Rhodophyta_a_chicken_and_egg_problem_/21617817 |
| Summary: | Antarctic macroalgal communities of the upper intertidal zone are particularly poor compared with other coastal regions. Exposure to desiccation and freezing combined with the abrasive effect of ice threatens the life of sessile organisms. One of the few species able to colonize this environment is the rhodophyte Pyropia endiviifolia . It belongs to the Bangiales, one of the oldest extant clades of photosynthetic eukaryotes, which has occurred for more than one billion years with basically the same morphological structure. Considering that the extent of Antarctic glaciation is a geologically recent event, we hypothesized that pre-adaptations to desiccation in bangiophytes may have contributed to the success of P. endiviifolia in Antarctica. To test this, we compared its photosynthetic performance and tolerance to desiccation and freezing with those from a related intertidal species, the temperate Atlantic species Porphyra linearis . As evidenced by gas exchange and chlorophyll fluorescence, P. endiviifolia ... |
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