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Publication Type J
Authors Ramani, B., T. Reeck, A. Debez, R. Stelzer, B. Huchzermeyer, A. Schmidt and J. Papenbrock
Title Aster tripolium L. and Sesuvium portulacastrum L.: two halophytes, two strategies to survive in saline habitats
Source Plant Physiology and Biochemistry
Author Keywords ATPase; chlorophyll fluorescence; gas exchange; ion analysis crassulacean acid metabolism; chlorophyll fluorescence; salt tolerance; mesembryanthemum-crystallinum; electron-transport; coupling factor; gas-exchange; water-stress; nacl stress; photosynthesis
Abstract Aster tripolium L. (Dollart, Germany) and Sesuvium portulacastrum L. (Dakhla, Morocco) are potential halophytic vegetables, fodder plants, and ornamentals for re-vegetating saline land. To compare their strategies involved in salt tolerance both plants were grown with 0%, 1.5%, and 3% (Aster) or 0%, 2.5%, and 5% (Sesuvium) NaCl in the watering solution. The growth rate was reduced in both species with increasing NaCl concentrations. The quotient of Na+/K+ indicates that Aster accumulates more K+ in comparison to Na+ while the reverse is true for Sesuvium. Osmolality of the leaf sap increased with increasing NaCl concentration in both Aster and Sesuvium. Transpiration rate was severely reduced in both Aster (3%) and Sesuvium (5%) plants after 10 d of NaCl watering. The CO2 assimilation rate decreased in Aster (3%) and Sesuvium (5%) NaCl-treated plants from day 5 to day 10. The most important results from chlorophyll fluorescence measurements were derived from the non-photochemical quenching analysis (NPQ). First, both plants had linearly increasing levels of NPQ with increasing NaCl concentrations. Second, Sesuvium had almost half the NPQ value when compared to Aster under increased soil salinity. In Aster P-ATPase activities were decreased in plants treated with 3% NaCl after three days of treatment, F-ATPase activities increased with increasing NaCl concentrations and no clear changes were measured in V-ATPase activities. In Sesuvium any changes could be observed in the three ATPase activities determined. To conclude, Aster and Sesuvium use different strategies in adaptation to soil salinity. (c) 2006 Elsevier SAS. All rights reserved.
Author Address Univ Hannover, Inst Bot, D-30419 Hannover, Germany. Univ Hannover, Inst Biophys, D-30419 Hannover, Germany. INRST, Lab Adaptat Plantes Contraintes Abiot, Hammam Lif 2050, Tunisia. Tierarztl Hsch, Inst Tierokol & Zellbiol, D-30559 Hannover, Germany. Papenbrock, J, Univ Hannover, Inst Bot, Herrenhauserstr 2, D-30419 Hannover, Germany. Jutta.Papenbrock@botanik.uni-hannover.de
29-Character Source Abbreviation Plant Physiol. Biochem.
Publication Date May-Jun
Year Published 2006
Volume 44
Issue 5-6
Beginning Page 395-408
Unique Article Identifier ISI:000240554400016
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