abstract: The effect of various concentrations of NaCl in the culture solution (up to 400 mM) on growth (fresh weight, dry weight, chlorophyll content) and net CO2gas exchange was studied in two halophytes, Mesembryanthemum nodiflorum L. and Suaeda maritima (L.) Dum. Mesembryanthemum nodiflorum reaches optimal growth at concentrations of 100 to 200 mM NaCl in the culture medium, whereas growth of Suaeda maritima is stimulated up to concentrations of 400 mM NaCl. Independent of this stimulated plant growth, net CO2uptake in the light appears to be decreased with increased salinity when net CO2assimilation is calculated on a fresh weight or dry weight basis. However, expressed per mg chlorophyll, net CO2uptake is clearly correlated with plant productivity at different levels of salinity.
authors.affiliation: Fachbereich Biologie der Technischen Hochschule Darmstadt, Darmstadt, Deutschland.|Fachbereich Biologie Botanisches Institut der Technischen Hochschule, Schnittspahnstr. 3-5, D-6100, Darmstadt, Bundesrepublik Deutschland.
authors.forename: Klaus
authors.initials: K
authors.lastname: Winter