Effects of exogenous proline on the physiological characteristics of Triticum aestivum L. and Lens culinaris Medik. under drought stress


  • Selma BEKKA University of Sciences and Technology Houari Boumediene (U.S.T.H.B), BP 32 El Alia, Bab Ezzouar 16111, Algeria.
  • Ouzna ABROUS-BELBACHIR University of Sciences and Technology Houari Boumediene (U.S.T.H.B), BP 32 El Alia, Bab Ezzouar 16111, Algeria.
  • Réda DJEBBAR University of Sciences and Technology Houari Boumediene (U.S.T.H.B), BP 32 El Alia, Bab Ezzouar 16111, Algeria.




Triticum aestivum L., Lens culinaris Medik., exogenous proline, drought tolerance


Proline, which is an indicator of stress, is often considered as a good parameter for the testing of plants with good drought tolerance capacity. Thus, exogenous application of proline is a possible technique to avoid the deleterious effects of the drought on plant growth. The objectives of this study are to investigate the impact exogenous proline on the physiological behavior of two plant species, bread wheat, a monocot, and lentil, a dicot, under drought stress conditions. After several preliminary tests, optimal concentrations of exogenous proline were determined (6 mM for bread wheat and 2 mM for lentil) and both species were treated in normal and drought conditions. The results showed that water deficit affected both species leading to a reduction in growth, chlorophyll content and relative water content. Likewise, 15 % PEG-6000, which is equivalent to osmotic potential of -0.31MPa, caused a high accumulation of proline. In almost of cases we also noted a remarkable decrease in catalase (Cat), ascorbate peroxidase (APX) and gaiacol peroxidase (GPX) activities which was probably due to the oxidative stress caused by drought stress. The application of proline in stressful conditions reduced the deleterious effects caused by the stress on both species, due, particularly, to the accumulation of free endogenous proline and the increase of Cat, APX and GPX activities.

Author Biographies

  • Selma BEKKA, University of Sciences and Technology Houari Boumediene (U.S.T.H.B), BP 32 El Alia, Bab Ezzouar 16111, Algeria.
    Laboratory of Biology and Physiology of Organisms, Faculty of Biological Sciences
  • Ouzna ABROUS-BELBACHIR, University of Sciences and Technology Houari Boumediene (U.S.T.H.B), BP 32 El Alia, Bab Ezzouar 16111, Algeria.
    Laboratory of Biology and Physiology of Organisms, Faculty of Biological Sciences
  • Réda DJEBBAR, University of Sciences and Technology Houari Boumediene (U.S.T.H.B), BP 32 El Alia, Bab Ezzouar 16111, Algeria.
    Laboratory of Biology and Physiology of Organisms, Faculty of Biological Sciences


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29. 10. 2018



Agronomy section

How to Cite

BEKKA, S., ABROUS-BELBACHIR, O., & DJEBBAR, R. (2018). Effects of exogenous proline on the physiological characteristics of Triticum aestivum L. and Lens culinaris Medik. under drought stress. Acta Agriculturae Slovenica, 111(2), 477–491. https://doi.org/10.14720/aas.2018.111.2.20

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