Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx
The terrestrial flora of Antarctica’s frozen continent is restricted to sparse ice-free areas and dominated by lichens and bryophytes. These plants frequently battle sub-zero temperatures, extreme winds and reduced water availability; all influencing their ability to survive and grow. Antarctic moss...
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ftfrontimediafig:oai:figshare.com:article/12800798 2023-05-15T14:04:09+02:00 Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx Alicia V. Perera-Castro Melinda J. Waterman Johanna D. Turnbull Michael B. Ashcroft Ella McKinley Jennifer R. Watling Jessica Bramley-Alves Angelica Casanova-Katny Gustavo Zuniga Jaume Flexas Sharon A. Robinson 2020-08-13T13:52:56Z https://doi.org/10.3389/fpls.2020.01178.s001 https://figshare.com/articles/dataset/Table_1_It_Is_Hot_in_the_Sun_Antarctic_Mosses_Have_High_Temperature_Optima_for_Photosynthesis_Despite_Cold_Climate_docx/12800798 unknown doi:10.3389/fpls.2020.01178.s001 https://figshare.com/articles/dataset/Table_1_It_Is_Hot_in_the_Sun_Antarctic_Mosses_Have_High_Temperature_Optima_for_Photosynthesis_Despite_Cold_Climate_docx/12800798 Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Antarctica bryophytes carbon balance electron transport rate mesophyll conductance net CO2 assimilation non-photochemical quenching respiration Dataset 2020 ftfrontimediafig https://doi.org/10.3389/fpls.2020.01178.s001 2020-08-19T22:56:09Z The terrestrial flora of Antarctica’s frozen continent is restricted to sparse ice-free areas and dominated by lichens and bryophytes. These plants frequently battle sub-zero temperatures, extreme winds and reduced water availability; all influencing their ability to survive and grow. Antarctic mosses, however, can have canopy temperatures well above air temperature. At midday, canopy temperatures can exceed 15°C, depending on moss turf water content. In this study, the optimum temperature of photosynthesis was determined for six Antarctic moss species: Bryum pseudotriquetrum, Ceratodon purpureus, Chorisodontium aciphyllum, Polytrichastrum alpinum, Sanionia uncinata, and Schistidium antarctici collected from King George Island (maritime Antarctica) and/or the Windmill Islands, East Antarctica. Both chlorophyll fluorescence and gas exchange showed maximum values of electron transport rate occurred at canopy temperatures higher than 20°C. The optimum temperature for both net assimilation of CO 2 and photoprotective heat dissipation of three East Antarctic species was 20–30°C and at temperatures below 10°C, mesophyll conductance did not significantly differ from 0. Maximum mitochondrial respiration rates occurred at temperatures higher than 35°C and were lower by around 80% at 5°C. Despite the extreme cold conditions that Antarctic mosses face over winter, the photosynthetic apparatus appears optimised to warm temperatures. Our estimation of the total carbon balance suggests that survival in this cold environment may rely on a capacity to maximize photosynthesis for brief periods during summer and minimize respiratory carbon losses in cold conditions. Dataset Antarc* Antarctic Antarctica East Antarctica King George Island Schistidium antarctici Windmill Islands Frontiers: Figshare Antarctic East Antarctica King George Island Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) |
institution |
Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Antarctica bryophytes carbon balance electron transport rate mesophyll conductance net CO2 assimilation non-photochemical quenching respiration |
spellingShingle |
Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Antarctica bryophytes carbon balance electron transport rate mesophyll conductance net CO2 assimilation non-photochemical quenching respiration Alicia V. Perera-Castro Melinda J. Waterman Johanna D. Turnbull Michael B. Ashcroft Ella McKinley Jennifer R. Watling Jessica Bramley-Alves Angelica Casanova-Katny Gustavo Zuniga Jaume Flexas Sharon A. Robinson Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx |
topic_facet |
Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Antarctica bryophytes carbon balance electron transport rate mesophyll conductance net CO2 assimilation non-photochemical quenching respiration |
description |
The terrestrial flora of Antarctica’s frozen continent is restricted to sparse ice-free areas and dominated by lichens and bryophytes. These plants frequently battle sub-zero temperatures, extreme winds and reduced water availability; all influencing their ability to survive and grow. Antarctic mosses, however, can have canopy temperatures well above air temperature. At midday, canopy temperatures can exceed 15°C, depending on moss turf water content. In this study, the optimum temperature of photosynthesis was determined for six Antarctic moss species: Bryum pseudotriquetrum, Ceratodon purpureus, Chorisodontium aciphyllum, Polytrichastrum alpinum, Sanionia uncinata, and Schistidium antarctici collected from King George Island (maritime Antarctica) and/or the Windmill Islands, East Antarctica. Both chlorophyll fluorescence and gas exchange showed maximum values of electron transport rate occurred at canopy temperatures higher than 20°C. The optimum temperature for both net assimilation of CO 2 and photoprotective heat dissipation of three East Antarctic species was 20–30°C and at temperatures below 10°C, mesophyll conductance did not significantly differ from 0. Maximum mitochondrial respiration rates occurred at temperatures higher than 35°C and were lower by around 80% at 5°C. Despite the extreme cold conditions that Antarctic mosses face over winter, the photosynthetic apparatus appears optimised to warm temperatures. Our estimation of the total carbon balance suggests that survival in this cold environment may rely on a capacity to maximize photosynthesis for brief periods during summer and minimize respiratory carbon losses in cold conditions. |
format |
Dataset |
author |
Alicia V. Perera-Castro Melinda J. Waterman Johanna D. Turnbull Michael B. Ashcroft Ella McKinley Jennifer R. Watling Jessica Bramley-Alves Angelica Casanova-Katny Gustavo Zuniga Jaume Flexas Sharon A. Robinson |
author_facet |
Alicia V. Perera-Castro Melinda J. Waterman Johanna D. Turnbull Michael B. Ashcroft Ella McKinley Jennifer R. Watling Jessica Bramley-Alves Angelica Casanova-Katny Gustavo Zuniga Jaume Flexas Sharon A. Robinson |
author_sort |
Alicia V. Perera-Castro |
title |
Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx |
title_short |
Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx |
title_full |
Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx |
title_fullStr |
Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx |
title_full_unstemmed |
Table_1_It Is Hot in the Sun: Antarctic Mosses Have High Temperature Optima for Photosynthesis Despite Cold Climate.docx |
title_sort |
table_1_it is hot in the sun: antarctic mosses have high temperature optima for photosynthesis despite cold climate.docx |
publishDate |
2020 |
url |
https://doi.org/10.3389/fpls.2020.01178.s001 https://figshare.com/articles/dataset/Table_1_It_Is_Hot_in_the_Sun_Antarctic_Mosses_Have_High_Temperature_Optima_for_Photosynthesis_Despite_Cold_Climate_docx/12800798 |
long_lat |
ENVELOPE(110.417,110.417,-66.350,-66.350) |
geographic |
Antarctic East Antarctica King George Island Windmill Islands |
geographic_facet |
Antarctic East Antarctica King George Island Windmill Islands |
genre |
Antarc* Antarctic Antarctica East Antarctica King George Island Schistidium antarctici Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica King George Island Schistidium antarctici Windmill Islands |
op_relation |
doi:10.3389/fpls.2020.01178.s001 https://figshare.com/articles/dataset/Table_1_It_Is_Hot_in_the_Sun_Antarctic_Mosses_Have_High_Temperature_Optima_for_Photosynthesis_Despite_Cold_Climate_docx/12800798 |
op_doi |
https://doi.org/10.3389/fpls.2020.01178.s001 |
_version_ |
1766275166289002496 |