Freezing stress tolerance of benthic freshwater diatoms from the genus Pinnularia: Comparison of strains from polar, alpine, and temperate habitats

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F24%3A00600621" target="_blank" >RIV/67985939:_____/24:00600621 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/24:10490678

Výsledek na webu

<a href="https://doi.org/10.1111/jpy.13486" target="_blank" >https://doi.org/10.1111/jpy.13486</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jpy.13486" target="_blank" >10.1111/jpy.13486</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Freezing stress tolerance of benthic freshwater diatoms from the genus Pinnularia: Comparison of strains from polar, alpine, and temperate habitats

Popis výsledku v původním jazyce

Diatoms are among the most important primary producers in alpine and polar freshwaters. Although temperate diatoms are sensitive to freezing, polar diatoms often exhibit more resistance. This is particularly true for members of the (predominantly terrestrial) Pinnularia borealis species complex. However, it remains unclear to what extent this resistance applies to other representatives of the genus. Here, we compare the freezing-stress tolerance of 11 freshwater, benthic strains representing different species of Pinnularia (including Caloneis) from polar, alpine, and temperate habitats. As vegetative cells, strains were exposed to freezing temperatures of4,10,20,40,80, and196 degrees C. Survival was assessed by light microscopy and photosynthetic measurements. We observed vegetative cells to be sensitive to low freezing temperatures, only mild freezing was survived by all tested strains, and most tested strains did not survive treatments <=-10 degrees C. However, individual strain sensitivities appeared related to their original habitats. For example, polar and alpine strains better withstood mild and moderate freezing (-4 and10 degrees C, respectively), although temperate strains were significantly affected by the mild freezing treatment, polar and alpine strains were not. The10 degrees C treatment was survived exclusively by polar strains, and only P. catenaborealis survived all treatments. Interestingly, this species exhibited the lowest survival in the10 degrees C treatment, potentially implying some metabolic activity even at freezing temperatures. Thus, despite more extensive sampling throughout the genus and finer temperature scaling compared to previous studies, the remarkable freezing-stress tolerance of the P. borealis species complex remains unique within the genus.

Název v anglickém jazyce

Freezing stress tolerance of benthic freshwater diatoms from the genus Pinnularia: Comparison of strains from polar, alpine, and temperate habitats

Popis výsledku anglicky

Diatoms are among the most important primary producers in alpine and polar freshwaters. Although temperate diatoms are sensitive to freezing, polar diatoms often exhibit more resistance. This is particularly true for members of the (predominantly terrestrial) Pinnularia borealis species complex. However, it remains unclear to what extent this resistance applies to other representatives of the genus. Here, we compare the freezing-stress tolerance of 11 freshwater, benthic strains representing different species of Pinnularia (including Caloneis) from polar, alpine, and temperate habitats. As vegetative cells, strains were exposed to freezing temperatures of4,10,20,40,80, and196 degrees C. Survival was assessed by light microscopy and photosynthetic measurements. We observed vegetative cells to be sensitive to low freezing temperatures, only mild freezing was survived by all tested strains, and most tested strains did not survive treatments <=-10 degrees C. However, individual strain sensitivities appeared related to their original habitats. For example, polar and alpine strains better withstood mild and moderate freezing (-4 and10 degrees C, respectively), although temperate strains were significantly affected by the mild freezing treatment, polar and alpine strains were not. The10 degrees C treatment was survived exclusively by polar strains, and only P. catenaborealis survived all treatments. Interestingly, this species exhibited the lowest survival in the10 degrees C treatment, potentially implying some metabolic activity even at freezing temperatures. Thus, despite more extensive sampling throughout the genus and finer temperature scaling compared to previous studies, the remarkable freezing-stress tolerance of the P. borealis species complex remains unique within the genus.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10620 - Other biological topics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Phycology

ISSN

0022-3646

e-ISSN

1529-8817

Svazek periodika

60

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

1105-1120

Kód UT WoS článku

001279867800001

EID výsledku v databázi Scopus

2-s2.0-85199985609