Summary
The effect of salinity on the ionic balance and the hexitol content of the halophyteP. maritima L. and the nonhalophytesP. major L. ssp.major, P. lanceolata L., andP. media L. was studied in a culture experiment. In response to salt application the nonhalophilous species increased their internal electrolyte content to a considerably greater extent at high transpiration thanP. maritima. Excessive uptake of Cl and SO4 following salt-treatment was in most cases compensated by a decline in the total organic anion content in all species under investigation. Na was strongly accumulated in the shoots ofP. maritima when subjected to salt-stress, while the nonhalophytic species tended to exclude this ion from leaf tissue enhancing Mg-uptake for charge balance. Acyclic polyhydric alcohols (sorbitol and mannitol), the dominant soluble carbohydrates in allPlantago species studied, increased, with one exception, in all plants under saline conditions. The results indicate marked physiological differences between the halophyteP. maritima and the nonhalophytic members of the genusPlantago in their reaction to salinity being perhaps partially responsible for differences in the degree of salt tolerance.
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Königshofer, H. Changes in ion composition and hexitol content of differentPlantago species under the influence of salt stress. Plant Soil 72, 289–296 (1983). https://doi.org/10.1007/BF02181968
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DOI: https://doi.org/10.1007/BF02181968