Fast reactivation of photosynthesis in arctic phytoplankton during the polar night(1)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F18%3A00493147" target="_blank" >RIV/61388971:_____/18:00493147 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1111/jpy.12750" target="_blank" >http://dx.doi.org/10.1111/jpy.12750</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/jpy.12750" target="_blank" >10.1111/jpy.12750</a>
Alternative languages
Result language
angličtina
Original language name
Fast reactivation of photosynthesis in arctic phytoplankton during the polar night(1)
Original language description
Arctic microalgae experience long periods of continuous darkness during the polar night, when they are unable to photosynthesize. Despite numerous studies on overwintering strategies, such as utilization of stored energy products, formation of resting stages, reduction of metabolic rates and heterotrophic lifestyles, there have been few attempts to assess the insitu physiological state and restoration of the photosynthetic apparatus upon re-illumination. In this study, we found diverse and active marine phytoplankton communities during the polar night at 78 degrees N. Furthermore, we observed rapid changes (20min) in the efficiency of photosynthetic electron transport upon re-illumination. High photosynthetic capacity and net primary production were established after 24h of re-illumination. Our results suggest that some Arctic autotrophs maintain fully functional photosystem II and downstream electron acceptors during the polar night even though the low insitu net primary production levels measured in January prove that light was not sufficient to support any measurable primary production. Due to low temperatures resulting in low respiratory rates as well as the absence of photodamage during the polar night, maintenance of basic photosynthetic machinery may actually pose relatively low metabolic costs for algal cells. This could allow Arctic microalgae to endure the polar night without the formation of dormant stages, enabling them to recover and take advantage of light immediately upon the suns return during the winter-spring transition.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10617 - Marine biology, freshwater biology, limnology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Phycology
ISSN
0022-3646
e-ISSN
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Volume of the periodical
54
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
461-470
UT code for WoS article
000441860300004
EID of the result in the Scopus database
2-s2.0-85051433024