Acclimation of the Euryhaline Toad Bufo Viridis to Hyperosmotic Solution (NaCl, Urea and Mannitol) | Zendy

U. Katz | Zendy; Gad Degani | Zendy; S. Gabbay | Zendy

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Acclimation of the Euryhaline Toad Bufo Viridis to Hyperosmotic Solution (NaCl, Urea and Mannitol)

Author(s) -

U. Katz,

Gad Degani,

S. Gabbay

Publication year - 1984

Publication title -

journal of experimental biology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.367

H-Index - 185

eISSN - 1477-9145

pISSN - 0022-0949

DOI - 10.1242/jeb.108.1.403

Subject(s) - urea , mannitol , osmotic concentration , acclimatization , toad , euryhaline , sodium , bufo marinus , chemistry , osmoregulation , biology , biochemistry , botany , ecology , salinity , organic chemistry

Bufo viridis were acclimated to hyperosmotic solutions of NaCl, urea or mannitol. The toads could not be acclimated to mannitol solutions of osmotic strength higher than 300 mosmol kg-1 H2O, but could be acclimated easily to NaCl and urea higher than 500 mosmol kg-1 H2O. Water uptake diminished under mannitol acclimation while the apparent osmotic permeability under NaCl and urea acclimation increased. Urea and sodium influx across the isolated skin changed inversely upon hyperosmotic acclimation, but they did not seem to depend on one another. The adaptational advantages of the observed changes are discussed.

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