Antarctic Lichens under Long-Term Passive Warming:
Species-Specific Photochemical Responses to Desiccation and
Heat Shock Treatments

J 2022

Antarctic Lichens under Long-Term Passive Warming: Species-Specific Photochemical Responses to Desiccation and Heat Shock Treatments

MARIN, Catalina; Miloš BARTÁK; Gotz PALFNER; Pablo VERGARA-BARROS; Francisco FERNANDOY et al.

Základní údaje

Originální název

Antarctic Lichens under Long-Term Passive Warming: Species-Specific Photochemical Responses to Desiccation and Heat Shock Treatments

Autoři

MARIN, Catalina; Miloš BARTÁK; Gotz PALFNER; Pablo VERGARA-BARROS; Francisco FERNANDOY; Josef HÁJEK a Angelica CASANOVA-KATNY

Vydání

Plants, MDPI, 2022, 2223-7747

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10611 Plant sciences, botany

Stát vydavatele

Švýcarsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.500

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/22:00128054

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

chlorophyll fluorescence; nitrogen isotope; climate change; thermal shock

Štítky

14314010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 17. 1. 2023 15:41, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Climate warming in the Antarctic tundra will affect locally dominant cryptogams. Being adapted to low temperatures and freezing, little is known about the response of the polar lichens’ primary photochemistry to warming and desiccation. Since 2008, we have monitored the ecophysiological responses of lichens to the future warming scenario during a long-term warming experiment through open top chambers (OTCs) on Fildes Peninsula. We studied the primary photochemical response (potential Fv/Fm and effective efficiency of photosystem II YPSII) of different lichen taxa and morphotypes under desiccation kinetics and heat shock experiments. As lichens grow slowly, to observe changes during warming we methodologically focused on carbon and nitrogen content as well as on the stable isotope ratios. Endemic Himantormia lugubris showed the strongest effect of long-term warming on primary photochemistry, where PSII activity occurred at a lower %RWC inside the OTCs, in addition to higher Fv/Fm values at 30 °C in the heat shock kinetic treatment. In contrast, Usnea aurantiaco-atra did not show any effect of long-term warming but was active at a thallus RWC lower than 10%. Both Cladonia species were most affected by water stress, with Cladonia aff. gracilis showing no significant differences in primary photochemical responses between the warming and the control but a high sensibility to water deficiency, where, at 60% thallus RWC, the photochemical parameters began to decrease. We detected species-specific responses not only to long-term warming, but also to desiccation. On the other hand, the carbon content did not vary significantly among the species or because of the passive warming treatment. Similarly, the nitrogen content showed non-significant variation; however, the C/N ratio was affected, with the strongest C/N decrease in Cladonia borealis. Our results suggest that Antarctic lichens can tolerate warming and high temperature better than desiccation and that climate change may affect these species if it is associated with a decrease in water availability.

Návaznosti

EF16_013/0001708, projekt VaV

Název: ECOPOLARIS - Změny ve struktuře a funkci součástí terestrických polárních ekosystémů (CzechPolar2)

VAN 2022, interní kód MU

Název: Český antarktický výzkumný program 2022 (Akronym: CARP 2022)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Český antarktický výzkumný program 2022, Výzkum v oblasti Antarktidy

Citovat

MARIN, Catalina; Miloš BARTÁK; Gotz PALFNER; Pablo VERGARA-BARROS; Francisco FERNANDOY; Josef HÁJEK a Angelica CASANOVA-KATNY. Antarctic Lichens under Long-Term Passive Warming: Species-Specific Photochemical Responses to Desiccation and Heat Shock Treatments. Plants. MDPI, 2022, roč. 11, č. 19, s. 1-23. ISSN 2223-7747. Dostupné z: https://doi.org/10.3390/plants11192463.

@article{2247391,
   author = {Marin, Catalina and Barták, Miloš and Palfner, Gotz and VergaraandBarros, Pablo and Fernandoy, Francisco and Hájek, Josef and CasanovaandKatny, Angelica},
   article_number = {19},
   doi = {https://doi.org/10.3390/plants11192463},
   keywords = {chlorophyll fluorescence; nitrogen isotope; climate change; thermal shock},
   language = {eng},
   issn = {2223-7747},
   journal = {Plants},
   title = {Antarctic Lichens under Long-Term Passive Warming: Species-Specific Photochemical Responses to Desiccation and Heat Shock Treatments},
   url = {https://www.mdpi.com/2223-7747/11/19/2463},
   volume = {11},
   year = {2022}
}

TY  - JOUR
ID  - 2247391
AU  - Marin, Catalina - Barták, Miloš - Palfner, Gotz - Vergara-Barros, Pablo - Fernandoy, Francisco - Hájek, Josef - Casanova-Katny, Angelica
PY  - 2022
TI  - Antarctic Lichens under Long-Term Passive Warming: Species-Specific Photochemical Responses to Desiccation and Heat Shock Treatments
JF  - Plants
VL  - 11
IS  - 19
SP  - 1-23
EP  - 1-23
PB  - MDPI
SN  - 22237747
KW  - chlorophyll fluorescence
KW  - nitrogen isotope
KW  - climate change
KW  - thermal shock
UR  - https://www.mdpi.com/2223-7747/11/19/2463
N2  - Climate warming in the Antarctic tundra will affect locally dominant cryptogams. Being adapted to low temperatures and freezing, little is known about the response of the polar lichens’ primary photochemistry to warming and desiccation. Since 2008, we have monitored the ecophysiological responses of lichens to the future warming scenario during a long-term warming experiment through open top chambers (OTCs) on Fildes Peninsula. We studied the primary photochemical response (potential Fv/Fm and effective efficiency of photosystem II YPSII) of different lichen taxa and morphotypes under desiccation kinetics and heat shock experiments. As lichens grow slowly, to observe changes during warming we methodologically focused on carbon and nitrogen content as well as on the stable isotope ratios. Endemic Himantormia lugubris showed the strongest effect of long-term warming on primary photochemistry, where PSII activity occurred at a lower %RWC inside the OTCs, in addition to higher Fv/Fm values at 30 °C in the heat shock kinetic treatment. In contrast, Usnea aurantiaco-atra did not show any effect of long-term warming but was active at a thallus RWC lower than 10%. Both Cladonia species were most affected by water stress, with Cladonia aff. gracilis showing no significant differences in primary photochemical responses between the warming and the control but a high sensibility to water deficiency, where, at 60% thallus RWC, the photochemical parameters began to decrease. We detected species-specific responses not only to long-term warming, but also to desiccation. On the other hand, the carbon content did not vary significantly among the species or because of the passive warming treatment. Similarly, the nitrogen content showed non-significant variation; however, the C/N ratio was affected, with the strongest C/N decrease in Cladonia borealis. Our results suggest that Antarctic lichens can tolerate warming and high temperature better than desiccation and that climate change may affect these species if it is associated with a decrease in water availability.
ER  -

MARIN, Catalina; Miloš BARTÁK; Gotz PALFNER; Pablo VERGARA-BARROS; Francisco FERNANDOY; Josef HÁJEK a Angelica CASANOVA-KATNY. Antarctic Lichens under Long-Term Passive Warming: Species-Specific Photochemical Responses to Desiccation and Heat Shock Treatments. \textit{Plants}. MDPI, 2022, roč.~11, č.~19, s.~1-23. ISSN~2223-7747. Dostupné z: https://doi.org/10.3390/plants11192463.

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