hkr.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The effect of dehydration rates on anhydrobiotic survival and trehalose levels in tardigrades
Kristianstad University College.
Kristianstad University College.
2006 (English)In: Tsunami, ISSN 1651-5803, no 3Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [en]

The disaccharide trehalose is an important factor in many anhydrobiotic organisms, as it has a strong stabilizing effect on proteins and enzymes under desiccation. Trehalose has the ability to maintain biological structures at low water levels that would otherwise lead to irreversible denaturation. The rate at which anhydrobiotic tardigrades desiccate influence the probability to survive during a dry period, and this has earlier been documented in studies on nematodes. In this study we experimentally evaluated the effect of desiccation rate on trehalose production and anhydrobiotic survival in two tardigrade species, by using different relative humidities in desiccators. In R. coronifer the analysed trehalose level increased significantly with higher relative humidity during desiccation. In M. cf. hufelandi no such increase was observed. The survival increased at higher humidities and the revival rate showed the same pattern. We suggest that total desiccation is necessary before revival at humidities lower than about 70%. The desiccation rate in nature is not well known. Our results show high survival in lower humidities which suggest that the animals are able to cope with a wide range of desiccation rates.

Abstract [sv]

Disackariden trehalos är en viktig faktor hos många anhydrobiotiska organismer, eftersom det har en starkt stabiliserande effekt på proteiner och enzymer under uttorkning. Trehalos har förmågan att bibehålla biologiska strukturer vid låga vattenhalter vilka annars skulle leda till irreversibla denatureringar. Hastigheten då anhydrobiotiska tardigrader torkar ut påverkar trehalosackumuleringen och sannolikheten för överlevnad under en torrperiod, detta har tidigare dokumenterats hos nematoder. I den här studien har vi experimentellt analyserat effekten av uttorkningshastighet på trehalosproduktion och anhydrobiotisk överlevnad hos två tardigradarter genom att använda olika relativa fuktigheter i desiccatorer. Hos R. coronifer ökade den analyserade trehaloshalten signifikant vid högre relativa fuktigheter under uttorkningen. Hos M. cf. hufelandi observerades ingen sådan ökning. Överlevnaden ökade vid högre fuktigheter och återupplivningshastigheten visade samma mönster. Våra resultat antyder att total uttorkning är nödvändig innan återupplivning kan ske vid fuktigheter lägre än runt 70%. Uttorkningshastigheten i naturen är inte väl känd. Våra resultat visar en hög överlevnad vid låga fuktigheter vilket tyder på att djuren har möjlighet att klara en stor spännvidd av uttorkningshastigheter.

Place, publisher, year, edition, pages
2006. no 3
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:hkr:diva-807OAI: oai:DiVA.org:hkr-807DiVA, id: diva2:216870
Available from: 2009-05-05 Created: 2009-05-05 Last updated: 2009-05-12Bibliographically approved

Open Access in DiVA

fulltext(490 kB)1243 downloads
File information
File name FULLTEXT02.pdfFile size 490 kBChecksum SHA-512
b6fbd3cf9a99e3b259f4dfa93106ab1210411433368326bbe84ec438b2e2bb12e43b7eb7bce687b4d088d4ce599f8b9581e298838ef3b5a5acfcc31bf7a79724
Type fulltextMimetype application/pdf

By organisation
Kristianstad University College
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 1243 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 179 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf