Evaluation of the effect of NaCl salt stress on some growth traits and antioxidant enzymes in two chicory (Cichorium intybus) seed ecotypes

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Abstract

In order to evaluate the effect of salt stress on seed germination, early growth and antioxidant enzymes activity of Chicory ecotypes (Cichorium intybus) a factorial experiment was conducted based on completely randomized design with four replications at College of Agriculture, Shiraz University in 2013. The treatments were included five salinity levels [tap water (0.62), 3, 6, 9, 12 dS m-1] of sodium chloride and chicory ecotypes (Black and White). The results showed that germination rate and germination percentage were decreased in both ecotypes with increment of salinity severity. In both ecotypes, the highest germination (100%) was observed in tap water and 3 dS m-1 and the lowest germination (37%) was obtained at 12 dS m-1. The lowest root (14.2 mm) and shoot length (12.45mm) was obtained at 12 dS m-1 respectively. The effect of salt stress on antioxidant enzyme activity was significant, so that those were enhanced with increment of salt stress; however, increasing in salinity level from 9 to 12 dS m-1 was associated with reduction in peroxidase activity in Black ecotype. The results of this study revealed that the White species was more affected by increasing in salt concentration, so it had more sensitivity salt stress. The salt tolerance also had a positive relationship with the antioxidant enzymes activities in Black ecotype, especially for catalase.

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Iranian Journal of Seed Sciences and Research
Volume 3, Issue 1
April 2016
Pages 33-45

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