VARIABILITE DE LA TOLERANCE AU STRESS SALIN CHEZ DEUX GENOTYPES CONTRASTES D’UNE LEGUMINEUSE Medicago truncatula AU STADE GERMINATION

AMOURI Adel Amar; , FYAD LAMECHE Fatima-Zohra; KARKACHI Noureddine

AMOURI Adel Amar Département de Biologie, Faculté des Sciences de la nature et de la vie, Université d’Oran1Ahmed Ben Bella, Es-Sénia BP1524, Oran, Algérie
, FYAD LAMECHE Fatima-Zohra Département de Biologie, Faculté des Sciences de la nature et de la vie, Université d’Oran1Ahmed Ben Bella, Es-Sénia BP1524, Oran, Algérie
KARKACHI Noureddine Département de Biologie, Faculté des Sciences de la nature et de la vie, Université d’Oran1Ahmed Ben Bella, Es-Sénia BP1524, Oran, Algérie

Keywords: Medicago truncatula, legumineuse, stress salin, germination, protéines solubles

Abstract

The study on the assessment of the variability of salt stress tolerance, focused on two contrasting genotypes of the plant M. truncatula under four levels of salt stress (distilled water as control 0; 68; 102 and 137 mM) of sodium chloride (NaCl) solution, one is tolerant (Tru 131) and the (Jemalong) the sensitive one. The data analysis of germination aptitude showed that the (Tru 131) genotype had the best germinatif ability, compared to (Jemalong). The soluble protein analysis, showed a high protein synthesis during salt stress application in the tolerant genotype compared to the sensitive one (Jemalong). The introduction of the most tolerant genotype (Tru 131) in arid and semi-arid areas in Algeria and Mediterranean regions, can improve significantly the vegetal productivity in order to ensure a good animal food and contribute to the fertilization of agricultural land.