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Water relations during desiccation of cysts of the potato-cyst nematode Globodera rostochiensis

Wharton, D.A.; Worland, M.R.. 2001 Water relations during desiccation of cysts of the potato-cyst nematode Globodera rostochiensis. Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 171 (2). 121-126. 10.1007/s003600000160

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Abstract/Summary

The loss during desiccation of osmotically active water (OAW), which freezes during cooling to -45 °C, and osmotically inactive water (OIW), which remains unfrozen, from the cysts of the potato cyst nematode, Globodera rostochiensis, was determined using differential scanning calorimetry. Exotherms and endotherms associated with non-egg compartments were not detected after 5 min desiccation at 50% relative humidity and 20 °C. The pattern of water loss from the cysts indicates that water is lost from compartments outside the eggs first, that nearly all the non-egg water is OAW and that the OIW content of the cyst is contained within the eggs. Water is lost from the eggs only after the OAW content outside the eggs falls below that within the eggs. Both OAW and OIW are lost from the eggs during desiccation but the eggs retain a small amount of OIW. Other animals which survive some desiccation but which are not anhydrobiotic will tolerate the loss of OAW but not the loss of their OIW. Anhydrobiotic animals can survive the loss of both their OAW and a substantial proportion of their OIW.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s003600000160
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Life at the Edge - Stresses and Thresholds
ISSN: 0174-1578
Additional Keywords: desiccation, differential scanning, calorimetry, osmotically active water, osmotically inactive water, anhydrobiosis
Date made live: 14 Nov 2012 08:46
URI: http://nora.nerc.ac.uk/id/eprint/20350

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