Climate change is the defining issue of our time, causing increased water stress and droughts. Water stress is one of the most serious threats to food security and sustainable deve-lopment today. In order to improve tolerance to this constraint, in addition to traditional and biotechnological methods, a new approach can be adopted by pregermination treatment. This technique, known as priming, consists of rehydrating seeds during the reversible phase of germination, before putting them back to germinate. The aim of our research is to study the consequences of applying different types of priming on the development and stress tolerance of certain crop species, and to understand the mechanisms governing seed priming at embryonic level. The results obtained in our experi-ments allow us to conclude that seed pre-germination treatments and, more specifically, double rehydration can improve germination performance, growth and development of plants under favorable or stressful conditions, by inducing physiological, biochemical and cellular modifications. This suggests that the biochemical and physiological mechanisms governing seed priming obey several complex and heterogeneous regulatory and signalling pathways, controlled by the expression of numerous genes. Some of the consequences of priming may be due to epigenetic events.

1. Priming des Semences : Une Méthode Prometteuse pour
l’Amélioration de la Résistance au Stress Hydrique
1er Symposium international de la protection des végétaux
École Nationale Supérieure Agronomique, 21,22 et 23 Novembre 2023
Lilya BOUCELHA et Réda DJEBBAR
Laboratoire de Biologie et Physiologie des Organisme, Faculté des Sciences Biologiques, USTHB, Alger, Algérie, Algérie
liliaboucelha@yahoo.fr / reda_djebbar@yahoo.fr
Quels sont les facteurs menaçant notre Sécurité Alimentaire ?
Conclusion et
Perspectives
Comment peut-on résoudre ce problème majeur à moindre coût ?
Quel est le principe du priming ? Quels sont les types du priming ?
Comment appliquer le priming ? Obtention de plantes tolérantes au déficit hydrique
Floraison et
Fructification
plus précoces
Traitement avec des bactéries,
extraits végétaux ou animaux, …
Coton
Hydropriming
Hydropriming +
Chimiopriming –Silicium
Fenugrec
Fenugrec
Simple et Double
Hydropriming +
Osmopriming–PEG
Vigna
unguiculta
Hydropriming +
Chimiopriming
SNP + CaCl2