An Eco-Physiological Investigation Into the Salt Tolerance of Glaux Maritima L.

Growth physiology, salt tolerance and mineral status of Glaux maritima L. were studied. This species is only at high salinity reduced in growth. At 300 mM NaCl still some vegetative growth occurs. Chlorophyll content is not strongly influenced by salt. Succulence degree does slightly increase when salinity is raised. The osmotic potential of the pressed sap grows progressively at higher salinities. K+ produces a relatively important contribution to the total osmotic potential. Salinity stimulates salt secretion up to 150 mM, at 300 mM NaCl secretion is firmly reduced. 40% of the absorbed Na+ may be secreted and 20% of Cl−. As compared with results established in Chenopodiaceae, organic acids seem to be of minor importance in the salt tolerance of this species as yet.