Effect of nitrogen deficiency, salinity and drought on proline metabolism in Sesuvium portulacastrum

  • Dorsaf Messedi
  • Ines Slama
  • Nahla Laabidi
  • Tahar Ghnaya
  • Arnould Savoure
  • Abdelaziz Soltani
  • Chedly Abdelly


Drought and high salinity are responsible for large decreases in crop productivity all over theworld [1]. These losses of crop yield result from limitations of plant development through excessive ion accumulation, water deficit and mineral deficiencies [2]. Under these prevalent stresses, tolerant plants adopt various strategies with a wide range of biochemical to physiological and morphological adaptations [3]. Morphological ones include modifications in growth and allocation of assimilates towards roots for an efficient exploitation of soil nutrients [4]. The physiological strategy is represented by a higher selectivity for K+ over Na+ [5], an increase in K+-use efficiency [6], and the synthesis of organic osmolytes, with low molecular weight, for osmo-protection [7]. These osmolytes are sugars, polyols, amino acids, tertiary and quarternary ammonium, and tertiary sulphonium compounds [8].


Glycine Betaine Proline Concentration Proline Biosynthesis Proline Metabolism Proline Dehydrogenase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Birkhäuser Verlag/Switzerland 2006

Authors and Affiliations

  • Dorsaf Messedi
    • 1
  • Ines Slama
    • 1
  • Nahla Laabidi
    • 1
  • Tahar Ghnaya
    • 1
  • Arnould Savoure
    • 2
  • Abdelaziz Soltani
    • 1
  • Chedly Abdelly
    • 1
  1. 1.Laboratoire d’Adaptation des Plantes aux Stress AbiotiquesINRSTHammam-LifTunisia
  2. 2.Unité Physiologie Cellulaire et Moléculaire des PlantesCNRS-UMR 7632ParisFrance

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