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

Result code in 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>

Alternative codes found

RIV/00216208:11310/24:10490678

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10620 - Other biological topics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Journal of Phycology

ISSN

0022-3646

e-ISSN

1529-8817

Volume of the periodical

60

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

1105-1120

UT code for WoS article

001279867800001

EID of the result in the Scopus database

2-s2.0-85199985609