Document Type : Research Paper

Authors

Abstract

This study was designed to investigate the effect of P. fluorescens FY32 inoculation on the activities of some antioxidant enzymes and ion concentration of two canola cultivars (Sarigol and Hyola308) under salinity stress (150 and 300 mM NaCl) in the greenhouse condition (fall 2012, Dept. of Plant breeding and Biotechnology, Faculty of Agriculture, University of Tabriz). The experimental design consisted of three factors replicated three times in a split-split plot design, with salinity as main factor. Data analysis showed that salt stress has significant effect on antioxidant enzyme activity (catalase, peroxidase and polyphenol oxidase). Concentration of sodium and chloride ions increased with increasing salinity, but this increase was little in the case of inoculated plants. The decrease in potassium content was smaller in inoculated plants in comparison with control. Hyola308 had the lowest reduction in dry matter and was tolerant cultivar in this experiment. Thia cultivar as a tolerant cultivar had low level of antioxidant activities and accumulation of sodium and chloride ions and also showed high concentration of potassium.

Keywords

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