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CATION COTOLERANCE IN A SALT‐TOLERANT CLONE OF AGROSTIS STOLONIFERA L.
Author(s) -
HODSON M. J.,
SMITH M. M.,
WAINWRIGHT S. J.,
ÖPIK H.
Publication year - 1982
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1982.tb03257.x
Subject(s) - agrostis stolonifera , salt (chemistry) , potassium , salt marsh , chemistry , clone (java method) , sodium , botany , agrostis , ammonium , salinity , horticulture , biology , biochemistry , ecology , poaceae , dna , organic chemistry
S ummary The tolerance of clones of Agrostis stolonifera from salt marsh and inland habitats to the chlorides of lithium, sodium, potassium, rubidium, caesium, magnesium and calcium was measured in water culture by a rooting index of tolerance technique. The salt marsh clone was always more tolerant than the inland clone. This was confirmed for LiCl, NaCl and KCl in separate experiments in which dry wt increments were measured. It is suggested that the evolution of tolerance to NaCl in the salt marsh clone has conferred cotolerance to the other alkali metal chlorides, and that the toxicity of LiCl, RbCl and CsCl at least, results from their cations and is not due to chloride ions nor to osmotic stress. Tolerance towards the two alkaline earth chlorides MgCl 2 and CaCl 2 was also examined. It is suggested that selection for MgCl 2 tolerance may have taken place in the salt marsh clone, and that this tolerance has conferred tolerance to CaCl 2 .