Cited by 22Collembola Taxonomy and Ecology StudiesPhysiological and biochemical adaptationsTardigrade Biology and Ecology

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Water relations and drought sensitivity of Folsomia candida eggs (Collembola: Isotomidae)

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HOLMSTRUP, Martin·2019·European Journal of Entomology

Abstract

Drought tolerance of juvenile and adult life stages is relatively well understood, but very little is known about the tolerance of eggs to drought in this group of animals. The aim of the present study was therefore to investigate the water relations and drought sensitivity of eggs of the hygrophilic springtail, Folsomia candida Willem, 1902 (Isotomidae), exposed to a range of soil water potentials above and below the permanent wilting point of plants (-1.5 MPa). Under saturated conditions, eggs absorbed water during development and increased water content from 1.1 to 2.9 mg mg-1 dry weight. By increasing drought conditions, water absorption was gradually reduced and was nullified approximately at the soil water potential equivalent to the osmolality of egg fluids (630 mOsm corresponding to -1.53 MPa). Eggs had a lower permeability for water (68 ± 13 µg water cm-2 h-1 mm Hg-1) than adults (about 400 µg water cm-2 h-1 mm Hg-1), but eggs were much more sensitive to drought than adults. Eggs did not survive exposure to -1.5 MPa, whereas adults readily survive this level of drought by absorbing water vapour. In conclusion, eggs of F. candida are sensitive to drought and would perish if soil water potential in the field approaches the wilting point of plants, which is often reached during summer droughts. The persistence of this species depends on the survival of post-embryonic life stages.

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Metadata

Authors
HOLMSTRUP, M.
Affiliations
Aarhus University (DK)
Corresponding author
HOLMSTRUP, Martin
Venue
European Journal of Entomology
Published
2019-06-28
Volume
116
Pages
229-234
ISSN
  • 1210-5759 (ISSN-L)
  • 1802-8829
OpenAlex
W2954913831
Cited by
22
References
37
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 7 · 2022: 5 · 2021: 2 · 2020: 1 · 2019: 1
FWCI
1.76
Type
journal article
Language
en
Open access
Locations
  • European Journal of Entomology (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Collembola Taxonomy and Ecology Studies
  • Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Tardigrade Biology and Ecology
Keywords
Folsomia candida, Collembola, Isotomidae, drought sensitivity, drought tolerance, soil water potential, permanent wilting point, water absorption, egg permeability, osmolality, summer drought

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