Effects of cold and salicylic acid treatments on nitrate reductase activity in spinach leaves

Authors : Belinda AYDIN, Barbaros NALBANTOĞLU

Pages : 443-448

View : 17 | Download : 6

Publication Date : 2011-12-01

Article Type : Research Paper

Abstract :The effects of long-term cold insert ignore into journalissuearticles values(5/3 °C); and salicylic acid insert ignore into journalissuearticles values(SA); insert ignore into journalissuearticles values(0.1 mM); treatments on the diurnal pattern of nitrate reductase insert ignore into journalissuearticles values(NR); activity in spinach insert ignore into journalissuearticles values(Spinacia oleracea L. cv. Gladiator); leaves were investigated. When the activities with cold treatment are compared to the control insert ignore into journalissuearticles values(20/15 °C);, NR activity was decreased by 5 °C in the light period and by 3 °C in the dark period. The cold treatment also affected the timing of circadian rhythm in the diurnal pattern of NR activity. When the activities with SA treatments are compared to control and cold, it was determined that SA increases NR activity in the light period of control while SA decreases NR activity in the light period of cold.
Keywords : Key words Cold, nitrate reductase activity, salicylic acid, Spinacia oleracea