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Drought acclimation and lipid composition in Folsomia candida: implications for cold shock, heat shock and acute desiccation stress

Holmstrup, M; Hedlund, Katarina LU and Boriss, H (2002) In Journal of Insect Physiology 48(10). p.961-970
Abstract
Many of the physiological adaptations evolved in terrestrial invertebrates to resist desiccation have also been shown to enhance the survival of low temperatures. In this study we have examined temporal changes in the physiology of the collembolan Folsomia candida during acclimation to mild desiccation stress (98.2% RH), and how physiological changes correlate with resistance to subsequent cold shock. heat shock and acute desiccation stress. Drought-acclimation increased the resistance to cold and acute drought but reduced the resistance to heat shock. The composition of membrane phospholipid fatty acids (PLFA) changed during acclimation resulting in a higher degree of unsaturation by the end of the 192-h acclimation period. This resembles... (More)
Many of the physiological adaptations evolved in terrestrial invertebrates to resist desiccation have also been shown to enhance the survival of low temperatures. In this study we have examined temporal changes in the physiology of the collembolan Folsomia candida during acclimation to mild desiccation stress (98.2% RH), and how physiological changes correlate with resistance to subsequent cold shock. heat shock and acute desiccation stress. Drought-acclimation increased the resistance to cold and acute drought but reduced the resistance to heat shock. The composition of membrane phospholipid fatty acids (PLFA) changed during acclimation resulting in a higher degree of unsaturation by the end of the 192-h acclimation period. This resembles typical membrane alterations seen in ectothermic animals exposed to cold. Only small changes were seen in the neutral lipid fraction. The temporal changes in cold resistance and drought resistance correlated well with changes in PLFA composition and accumulation of sugars and polyols ('cryoprotectives'). It is proposed that the drought-induced PLFA desaturation, combined with the membrane protecting accumulation of cryoprotectives, are important physiological adaptations providing tolerance to both desiccation and cold. (C) 2002 Elsevier Science Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Insect Physiology
volume
48
issue
10
pages
961 - 970
publisher
Elsevier
external identifiers
  • wos:000179126400006
  • scopus:0036804561
ISSN
1879-1611
DOI
10.1016/S0022-1910(02)00175-0
language
English
LU publication?
yes
id
ab9e8401-7061-4a1d-b60d-8c8caf7431c8 (old id 145469)
date added to LUP
2007-06-25 08:27:20
date last changed
2017-11-26 03:39:33
@article{ab9e8401-7061-4a1d-b60d-8c8caf7431c8,
  abstract     = {Many of the physiological adaptations evolved in terrestrial invertebrates to resist desiccation have also been shown to enhance the survival of low temperatures. In this study we have examined temporal changes in the physiology of the collembolan Folsomia candida during acclimation to mild desiccation stress (98.2% RH), and how physiological changes correlate with resistance to subsequent cold shock. heat shock and acute desiccation stress. Drought-acclimation increased the resistance to cold and acute drought but reduced the resistance to heat shock. The composition of membrane phospholipid fatty acids (PLFA) changed during acclimation resulting in a higher degree of unsaturation by the end of the 192-h acclimation period. This resembles typical membrane alterations seen in ectothermic animals exposed to cold. Only small changes were seen in the neutral lipid fraction. The temporal changes in cold resistance and drought resistance correlated well with changes in PLFA composition and accumulation of sugars and polyols ('cryoprotectives'). It is proposed that the drought-induced PLFA desaturation, combined with the membrane protecting accumulation of cryoprotectives, are important physiological adaptations providing tolerance to both desiccation and cold. (C) 2002 Elsevier Science Ltd. All rights reserved.},
  author       = {Holmstrup, M and Hedlund, Katarina and Boriss, H},
  issn         = {1879-1611},
  language     = {eng},
  number       = {10},
  pages        = {961--970},
  publisher    = {Elsevier},
  series       = {Journal of Insect Physiology},
  title        = {Drought acclimation and lipid composition in Folsomia candida: implications for cold shock, heat shock and acute desiccation stress},
  url          = {http://dx.doi.org/10.1016/S0022-1910(02)00175-0},
  volume       = {48},
  year         = {2002},
}