J 2013

The ice nucleation activity of extremophilic alga

KVÍDEROVÁ, Jana, Josef HÁJEK and Roger M WORLAND

Basic information

Original name

The ice nucleation activity of extremophilic alga

Authors

KVÍDEROVÁ, Jana (203 Czech Republic), Josef HÁJEK (203 Czech Republic, guarantor, belonging to the institution) and Roger M WORLAND (826 United Kingdom of Great Britain and Northern Ireland)

Edition

CryoLetters, 2013, 0143-2044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10600 1.6 Biological sciences

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 0.640

RIV identification code

RIV/00216224:14310/13:00065794

Organization unit

Faculty of Science

UT WoS

000337718200004

Keywords in English

ice nucleation; lichen symbiotic algae; snow algae; supercooling point

Tags

Tags

International impact, Reviewed
Změněno: 28/4/2014 11:14, Ing. Zdeňka Rašková

Abstract

V originále

Differences in the level of cold acclimation and cryoprotection estimated as ice nucleation activity in snow algae (Chlamydomonas cf. nivalis and Chloromonas nivalis), lichen symbiotic algae (Trebouxia asymmetrica, Trebouxia erici and Trebouxia glomerata), and a mesophilic strain (Chlamydomonas reinhardti) were evaluated. Ice nucleation activity was measured using the freezing droplet method. Measurements were performed using suspensions of cells of A750 (absorbance at 750 nm) ~ 1, 0.1, 0.01 and 0.001 dilutions for each strain. The algae had lower ice nucleation activity, with the exception of Chloromonas nivalis contaminated by bacteria. The supercooling points of the snow algae were higher than those of lichen photobionts. The supercooling points of both, mesophilic and snow Chlamydomonas strains were similar. The lower freezing temperatures of the lichen algae may reflect either the more extreme and more variable environmental conditions of the original localities or the different cellular structure of the strains examined.

Links

KJB601630808, research and development project
Name: Účinky chladu a mrazu na fotosyntézu lišejníkových symbiotických řas ovlivněných ribitolem.
Investor: Academy of Sciences of the Czech Republic, Effects of low and freezing temperatures on photosynthesis in lichen symbiotic algae affected by ribitol
LM2010009, research and development project
Name: Projekt CzechPolar - České polární stanice: Stavba a operační náklady
Investor: Ministry of Education, Youth and Sports of the CR