Journal ArticleDOI
A comparison of the rate of drying of four nematode species using a liquid paraffin technique
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TLDR
A technique of immersion refractometry has been employed to compare the rates at which four species of nematodes lose water during desiccation at 0% r.h, and Ditylenchus dipsaci revived from ‘wool’ showed a marked decrease in ability to control water loss when compared with freshly extracted worms.Abstract:
SUMMARY
A technique of immersion refractometry has been employed to compare the rates at which four species of nematodes lose water during desiccation at 0% r.h. Panagrellus redivivus and Ditylenchus myceliophagus showed little ability to control water loss, although in the latter species coiling helped slow the rate of drying. Ditylenchus dipsaci and Anguina tritici exhibited a much greater degree of control over water loss during desiccation, A. tritici being more successful. D. dipsaci revived from ‘wool’ showed a marked decrease in ability to control water loss when compared with freshly extracted worms. The results obtained have been compared with those from work using interference microscopy, and a critical assessment of the liquid paraffin technique is presented.read more
Citations
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Journal ArticleDOI
Biochemical and physiological aspects of anhydrobiosis
TL;DR: Results suggest that the role of high lipid contents in nematode anhydrobiotes is essentially that of a food reserve, although the morphological distribution of such lipid may be important in maintaining the spatial distribution of body tissues in the absence of bulk water.
Journal ArticleDOI
Natural dehydration regimes as a prerequisite for the successful induction of anhydrobiosis in the nematode Rotylenchulus reniformis.
TL;DR: The results suggest that R. reniformis is well-adapted to its environment and emphasize the importance of natural dehydration regimes for assessing anhydrobiotic potential.
Journal ArticleDOI
Anhydrobiosis in nematodes—I. The role of glycerol myo-inositol and trehalose during desiccation
TL;DR: Significant differences in free and bound sugar levels were found between the two good anhydrobiotes Anguina tritici and Ditylenchus dipsaci and the three poor survivors Pangrellus redivivus, D. myceliophagous and Turbatrix aceti.
Journal Article
Genetics of the Nematode Heterorhabditis bacteriophora Strain HP88: The Diversity of Beneficial Traits
TL;DR: The heritability values for heat or ultraviolet tolerance and for host-finding ability were high, indicating that selection should be an efficient way for improving these traits in the population and suggesting that selective breeding for higher desiccation tolerance would be inefficient.
Journal ArticleDOI
Desiccation survival of parasitic nematodes.
TL;DR: Behavioural and morphological adaptations associated with desiccation survival serve primarily to reduce the rate of drying, to prolong the time taken for the nematode's water content to reach lethal low levels or, in true anhydrobiotes, to enable the structural and biochemical changes required for long-term survival to take place.
References
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Journal ArticleDOI
Desiccation survival in the plant parasitic nematodes, Heterodera rostochiensis Wollenweber and Ditylenchus dipsaci (Kuhn) Filipjev
TL;DR: Using interference microscopy, it is shown that the free second-stage larva of the potato-root eelworm, Heterodera rostochiensis, takes up water at the same rate as one still inside the eggshell; the enclosed larva, however, loses water far less rapidly.
Journal ArticleDOI
The water dynamics of stages of Ditylenchus dipsaci and D. myceliophagus during desiccation and rehydration
TL;DR: Interference microscopy has been used to study the rate at which water enters and is lost from larval and adult stages of Ditylenchus dipsaci and D. myceliophagus and demonstrates the remarkable ability of the 4th–stage larva of D. dipsaci to control its rate of drying.
Journal ArticleDOI
Desiccation survival of larval and abult stages of the plant parasitic nematodes, Ditylenchus dipsaci and D. myceliophagus
TL;DR: The effect of different relative humidities on the survival of individual larvae and adults of Ditylenchus dispasci and D. myceliophagus has been examined in this article.
Journal ArticleDOI
The effect of previous desiccation on the ability of 4th-stage larvae of Ditylenchus dipsaci to control rate of water loss and to survive drying
TL;DR: In this paper, the authors compared the desiccation survival of 4th-stage larvae of Ditylenchus dipsaci revived from dry worm aggregations (wool) with that of larvae extracted from narcissus bulbs (bulb) and concluded that the ability to control water loss does not guarantee survival.
Journal ArticleDOI
Observations on Panagrellus redivivus Goodey, 1945.
C. Ellenby,L. Smith +1 more
TL;DR: Comparison of the sex ratios of the mature worms present in the culture medium and on the walls and lids of the culture vessels indicated a shift towards maleness in the sex ratio with distance from the culturemedium.
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