Variations in α-, β-amylase and α-glycosidase activities in two genotypes of wheat under NaCl salinity stress

Chaffei Haouari Chiraz


Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie (Tunisia)

Hajjaji Nasraoui Afef

hajajiafef@yahoo.fr
Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie (Tunisia)

Bouthour Donia


Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie (Tunisia)

Gouia Houda


Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie (Tunisia)


Abstract

Two wheat differing in salt sensitivity, was examined for osmolyte contents and activities of α-amylase, β-amylase and α-glucosidase enzymes involved in seeds germination, in absence as well as in presence of  100, 150, 200 and 300 mM NaCl. The inhibitory effects of NaCl differed, depending on the species tested. In wild wheat specie (Triticum monococcum), with reduced germination percentage and lower relative water  content, the   increase in NaCl concentration resulted in the decrease in endogenous level of proline, total soluble sugars and activities of the main enzymes involved in the germination process. In contrast, cultivated  wheat specie (Triticum aestivum) seed in response to salt stress accumulated higher proline and total soluble  carbohydrate concentrations  which improved  their  water  status and the enzyme  activities  involved  in the germination  process. Differential response of the different species of wheat to salt stress is governed by the accumulation of osmolytes in seeds.


Keywords:

amylases, glucosidases, salinity, wheat species

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Published
2012-08-20

Cited by

Chiraz, C. H., Afef, H. N. ., Donia, B. ., & Houda, G. . (2012). Variations in α-, β-amylase and α-glycosidase activities in two genotypes of wheat under NaCl salinity stress. Plant Breeding and Seed Science, 66, 89–98. Retrieved from http://ojs.ihar.edu.pl/index.php/pbss/article/view/320

Authors

Chaffei Haouari Chiraz 

Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie Tunisia

Authors

Hajjaji Nasraoui Afef 
hajajiafef@yahoo.fr
Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie Tunisia

Authors

Bouthour Donia 

Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie Tunisia

Authors

Gouia Houda 

Unité de Recherche Nutrition et Métabolisme Azotés et Protéines de Stress (99UR/09-20), Département de Biologie, Faculté des Sciences de Tunis. Campus Universitaire El Manar I, 1060, Tunis, Tunisie Tunisia

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