Salt tolerance in the halophyte Salicornia dolichostachya Moss: Growth, morphology and physiology.

D. Katschnig, R.A. Broekman, J. Rozema

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Salinization of agricultural land is an increasing problem. Because of their high tolerance to salinity, Salicornia spp. could become models to study salt tolerance; they also represent promising saline crops. The salinity-growth response curve for Salicornia dolichostachya Moss was evaluated at 12 salt concentrations in a hydroponic study in a greenhouse and at 5 different seawater dilutions in an outside setting. Salt concentrations ranged between 0. mM and 500. mM NaCl (≈seawater salinity). Plants were grown for six weeks and morphological and physiological adaptations in different tissues were evaluated.S. dolichostachya had its growth optimum at 300mM NaCl in the root medium, independent of the basis on which growth was expressed. The relative growth rate (RGR) in the greenhouse experiment was comparable with RGR-values in the outdoor growth experiment. Leaf succulence and stem diameter had the highest values at the growth optimum (300mM NaCl). Carbon isotope discrimination (δ
Original languageEnglish
Pages (from-to)32-42
JournalEnvironmental and Experimental Botany
Volume92
DOIs
Publication statusPublished - 2013

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