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Hiroshima University (2016)

Molecular Physiological Study on the Adaptive Mechanisms to Salinity Stress in Egyptian Rice Cultivars

Ahmad Mohammad Mohammad Mekawy

Titre : Molecular Physiological Study on the Adaptive Mechanisms to Salinity Stress in Egyptian Rice Cultivars

Auteur : Ahmad Mohammad Mohammad Mekawy

Université de soutenance : Hiroshima University

Grade : Doctoral Thesis 2016

Descriptif
The objective of this study was to characterize the physiological responses and adaptation mechanisms to salinity stress in some Egyptian rice cultivars by comparing the physiological parameters, Na+accumulation patterns and expression profiles of the genes that encode Na+ and K+ transport proteins. Moreover, further elucidation of salinity-tolerance mechanisms in the salinity-tolerant cultivar through the isolation and characterization of salinity inducible genes which might function in other tolerance pathways under salinity stress conditions, thus could be another adaptation strategy to abiotic stress in this cultivar.

Study objectives
1. Investigating the physiological responses and mode of adaptation to salinity stress in the Egyptian rice cultivars, Sakha 102 and Egyptian Yasmine by comparing the growth criteria, Na+ and K+ accumulation patterns and other physiological parameters under salinity stress conditions in a hydroponic culture system.
2. Elucidation of differences in the mechanisms of salinity tolerance (Na+ and /or K+ accumulation patterns), between the salinity-tolerant and salinity-sensitive rice cultivars by analyzing the expression profiles of the genes that encode Na+ and/or K+ transport proteins.
3. Further elucidation of the molecular mechanisms of salinity tolerance in the salinitytolerant rice cultivar, through the isolation and characterization of salinity-inducible genes and examine their functional roles which could be involved in other adaptation processes under salinity stress conditions

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Page publiée le 15 octobre 2016, mise à jour le 19 avril 2020