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The Physiological Response of Nematodes To Osmotic Stress and an Osmotic Treatment for Separating Nematodes

The Physiological Response of Nematodes To Osmotic Stress and an Osmotic Treatment for Separating... THE PHYSIOLOGICAL RESPONSE OF NEMATODES TO OSMOTIC STRESS AND AN OSMOTIC TREATMENT FOR SEPARATING NEMATODES BY D. R. VIGLIERCHIO, N. A. CROLI *) and J. H. GORTZ Department of Nematology, University of California, Davis, California 95616 Ditylenchus dipsaci, Hemicycliophora arenaria, Meloidogyne hapla, 'Pratylenchu.r vulnus, Rhab. ditis spp. and Tylenchulus semipenetrans have been compared with respect to osmotic stress. After 24 hr in various concentrations of hypertonic electrolyte (NaCl) or non-electrolyte (urea), they were transferred to distilled water and their percentage mobility calculated. Their physiological responses varied considerably and from the results a treatment has been devised for separating Rhabditis spp. from D. dipsaci. The data are discussed with reference to possible mechanisms of osmotic tolerance and control and to differences in the biology of the nematodes. Saprobic nematodes from decaying organic materials are able to tolerate widely fluctuating osmotic potentials (Stephenson, 1942; Sachs, 1950; Osche, 1952). Following prolonged treatment in hypertonic solutions and subsequent return to distilled water, however, Rhabditi.r spp. burst (Osche, 1952). Stephenson (1942) found that 0.51 molar NaCl was toxic to 60% of R. terre.rtri.r after 26 hr but that they recovered if in 0.34 molar Nacl. Bursting was also observed for the marine nematode http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematologica Brill

The Physiological Response of Nematodes To Osmotic Stress and an Osmotic Treatment for Separating Nematodes

Viglierchio, D.R.; Croli, N.A.; Gortz, J.H.
Nematologica , Volume 15 (1): 7 – Jan 1, 1969
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2596
eISSN
1875-2926
DOI
10.1163/187529269X00047
Publisher site
See Article on Publisher Site

Abstract

THE PHYSIOLOGICAL RESPONSE OF NEMATODES TO OSMOTIC STRESS AND AN OSMOTIC TREATMENT FOR SEPARATING NEMATODES BY D. R. VIGLIERCHIO, N. A. CROLI *) and J. H. GORTZ Department of Nematology, University of California, Davis, California 95616 Ditylenchus dipsaci, Hemicycliophora arenaria, Meloidogyne hapla, 'Pratylenchu.r vulnus, Rhab. ditis spp. and Tylenchulus semipenetrans have been compared with respect to osmotic stress. After 24 hr in various concentrations of hypertonic electrolyte (NaCl) or non-electrolyte (urea), they were transferred to distilled water and their percentage mobility calculated. Their physiological responses varied considerably and from the results a treatment has been devised for separating Rhabditis spp. from D. dipsaci. The data are discussed with reference to possible mechanisms of osmotic tolerance and control and to differences in the biology of the nematodes. Saprobic nematodes from decaying organic materials are able to tolerate widely fluctuating osmotic potentials (Stephenson, 1942; Sachs, 1950; Osche, 1952). Following prolonged treatment in hypertonic solutions and subsequent return to distilled water, however, Rhabditi.r spp. burst (Osche, 1952). Stephenson (1942) found that 0.51 molar NaCl was toxic to 60% of R. terre.rtri.r after 26 hr but that they recovered if in 0.34 molar Nacl. Bursting was also observed for the marine nematode

Journal

Nematologica – Brill

Published: Jan 1, 1969

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