The role of osmoprotectants and antioxidant enzymes in the differential response of durum wheat genotypes to salinity

Azzedine Fercha
Hocine Gherroucha

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Publication date

March 2014

DOI

10.5073/JABFQ.2014.011

Publisher

Julius Kühn-Institut

Journal

issn:1613-9216

Abstract

This study aims to investigate the importance of accumulation of osmoprotectants and activities of some key antioxidant enzymes in genotypic variation (GV) observed among durum wheat genotypes in response to increasing NaCl salinity (0-200 mmol/L) at seedling stage. Germination and seedling growth traits of all the genotypes were significantly decreased by salinity. Mohamed Ben Bachir, the more salt-tolerant genotype, exhibited the lowest reduction in final germination percentage (FGP, <18%) and seedling growth (<60%, based on dry biomass), the lowest increase in proline (PRO) and water soluble carbohydrates contents but highest the increase in catalase (CAT) and ascorbate peroxidase (APX) activities. Correlation and principal components an...