Effect of Salinity on Growth Chemical Composition and Antioxidative Enzyme Activity of Two Malting Barley (Hordeum vulgare L.) Cultivars

Authors : Mehmet Ali DEMİRAL, Mehmet AYDIN, Alper YORULMAZ

Pages : 117-123

View : 19 | Download : 8

Publication Date : 2005-12-01

Article Type : Research Paper

Abstract :The effects of salinity on the growth, chemical composition and superoxide dismutase insert ignore into journalissuearticles values(SOD); and peroxidase insert ignore into journalissuearticles values(POX); activities of 2 malting barley insert ignore into journalissuearticles values(Hordeum vulgare L.); cultivars insert ignore into journalissuearticles values(Kaya and Scarlet); were studied. In 10-day-old seedlings, salinity stress was initiated by applying an appropriate amount of NaCl to water, and it lasted for 30 days. Salinity decreased growth of the cultivars significantly. Scarlet restricted entry of Na+ and Cl- into root and translocation to leaves more efficiently than did Kaya. As a whole Scarlet produced a higher amount total chlorophyll under salinity than did Kaya. POX activity of the cultivars decreased with salinity up to 20 dS m-1, and then increased. In contrast to POX, salinity increased the SOD activity of leaves. Compared to the control application, 5.31% and 16.34% increases were determined in SOD activity, in 10 dS m-1 salinity, for Kaya and Scarlet, respectively.
Keywords : Hordeum vulgare L, superoxide dismutase, peroxidase, salinity stress, chemical content, growth