Screening of cold tolerance in fifteen springtail species.

https://arctichealth.org/en/permalink/ahliterature295816
Source
J Therm Biol. 2018 Oct; 77:1-6
Publication Type
Journal Article
Date
Oct-2018
Author
Martin Holmstrup
Author Affiliation
Section of Soil Fauna Ecology and Ecotoxicology, Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark; Arctic Research Center, Aarhus University, Ny Munkegade 114, 8000 Aarhus C, Denmark. Electronic address: martin.holmstrup@bios.au.dk.
Source
J Therm Biol. 2018 Oct; 77:1-6
Date
Oct-2018
Language
English
Publication Type
Journal Article
Keywords
Acclimatization
Animals
Arthropods - chemistry - physiology
Cold Temperature
Freezing
Hemolymph - chemistry - physiology
Seasons
Transition Temperature
Water - analysis - metabolism
Abstract
Springtails (Collembola) are ubiquitous and help ecosystem processes such as the decomposition of dead plant material. Their ability to survive low winter temperatures is an important trait that partly defines their geographic distribution. The cold tolerances of 15 laboratory-reared species of springtails were investigated. Springtails were cold acclimated in the laboratory over two months in order to simulate a seasonal change in temperature during autumn. Springtails were then exposed to decreasing sub-zero temperatures and at the same time simulating the moisture conditions in frozen soil. The cold tolerance of the species reflected well the climate of region of origin. Differential scanning calorimetry of individual springtails showed that melting points of body fluids did not become lower due to long-term cold acclimation (from 20° to 1.5°C). However, both water content and melting point of two arctic species (Hypogastrura viatica and Protaphorura macfadyeni) decreased drastically during exposure to sub-zero temperatures indicating cryoprotective dehydration (CPD). These arctic species survived exposure to -?9?°C for two weeks and -?20?°C for at least one week using CPD. Four other subarctic or cool temperate species also used CPD and survived -?9?°C for weeks, whereas springtails in culture from less cool temperate regions had poor cold tolerance.
PubMed ID
30196888 View in PubMed
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