Effect of drought stress on the morphology and antioxidant enzymes activity of Foeniculum vulgare cultivars in Sistan
Plants respond to a variety of abiotic and biotic signals influencing their growth and development. Although the responses are different between plants, in case the growth of medicinal plant, yield production and responses to environmental stresses is right dependent on genotype. Foeniculum vulgare (fennel) is annual, biennial or perennial plant, belongs to Apiaceae family. In this study, effect of water stress was investigated among 10 different fennel genotypes in completely random blocks design during years 2012–2014. The plant height, biologic yield, thousand grain weight, ash percentage and activities of CAT, APX and GPX enzymes and proline content were evaluated and compared between genotypes. It was evident that Shiraz genotype occupied the highest level position in majority of traits such as CAT activity, thousand grain weights, biologic yield and proline content. The correlation analysis revealed that proline level had the highest correlation with the thousand grain weight. Based on the components analysis in the first year, four components have values greater than 1 and the first component alone explained 40% of the total variation. The CAT activity had the highest coefficient in the first component. In the second year, three components had values greater than 1 which the first component was explained 35% of variation and thousand grain weight showed the highest coefficient. Cluster analysis divided the parameters studied in the three groups in both years. Biplot results showed that the Shiraz genotype was in the best position with respect to the first component and possess the highest yield production rate compared to other genotypes.
KeywordsAntioxidant activity Biplot analysis Fennel (Foeniculum vulgare) Water stress
Authors are grateful to the Cultural Affairs of university of Zabol for their unending effort to provide financial support to undertake this work.
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