CO2 dark fixation in the halophytic species mesembryanthemum crystallinum |
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Authors: | Klaus Winter, Ulrich Lü ttge,Erika Ball |
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Abstract: | The time course of 14CO2 dark fixation was studied in leaves of the facultatively halophytic plant species Mesembryanthemum crystallinum cultivated with and without 400 mM NaCl in the nutrient medium. It is generally known from the literature that plants grown under saline conditions incorporate 14C predominately into amino acids. By contrast in leaves of M. crystallinum grown on NaCl and exposed to 14CO2 in the dark, relatively more radioactivity is incorporated in the organic acids (especially malate) than in amino acids. The data obtained are discussed in relation to the NaCl induced Crassulacean acid metabolism in M. crystallinum reported earlier. |
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