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Egg-shell permeability and hatching of Ascaris suum
- Source :
- Parasitology. 80(3)
- Publication Year :
- 1980
-
Abstract
- SummaryWhen eggs ofAscaris suumwere transferred from glass-distilled water into 0·1–0·4mNaCl solutions, the water content of the unhatched juveniles fell with increasing concentration of solute. The effect was reversible. The egg-shell was thus permeable to water. The osmotic pressure of the egg fluid was osmotically equivalent to between 0·1 and 0·2mtrehalose. In hatching experiments in Fairbairn's medium containing 0·1 or 0·2mtrehalose, only 5 and 3% respectively of the eggs hatched; 83% of the eggs hatched in the absence of trehalose. The evidence suggests that loss of solutes from the egg fluid permits an increase in the water content of the unhatched juveniles and that this may be responsible for ending their quiescence.
- Subjects :
- biology
Hatching
Nacl solutions
Ascaris
Water
biology.organism_classification
Trehalose
Permeability
chemistry.chemical_compound
Egg Shell
Infectious Diseases
Animal science
chemistry
Osmotic Pressure
Water metabolism
Osmotic pressure
Animals
Animal Science and Zoology
Parasitology
Female
Eggshell
Water content
Ascaris suum
Ovum
Subjects
Details
- ISSN :
- 00311820
- Volume :
- 80
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Parasitology
- Accession number :
- edsair.doi.dedup.....df5d40b66eafa899ff9d746bb03cb3d0