Effects of Salt Stress and Synthetic Hormone Polystimuline K on Photosynthetic Activity of Trianea bogotensis Karst

Authors : Surhay Ragimoğlu ALLAHVERDIEV

Pages : 19-24

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In the present study the effect of kinetin like synthetic hormone Polystimuline K insert ignore into journalissuearticles values(PS-K); on photosynthetic activity of salt stressed Trianea bogotensis Karst insert ignore into journalissuearticles values(Hydrocharitaceae); has been shown. Chlorophyll variable fluorescence insert ignore into journalissuearticles values(Fv); and slow fluo- rescence insert ignore into journalissuearticles values(SF); have been used to investigate the sensitivity of Photosystem II insert ignore into journalissuearticles values(PS II); to different salt stress treatments insert ignore into journalissuearticles values(103, 155 and 344 mM);, at different time courses insert ignore into journalissuearticles values(15, 30, 60, 360 and 720 minutes);. Salt stress insert ignore into journalissuearticles values(155 mM NaCl); treatments of the seed- lings inhibited the SF magnitude approximately to 50 %. Pretreatment of seedlings for 30 minutes in 20 mg/l PS-K followed by salt stress resulted in an increase in SF magnitude. Under salt stress the magnitude of Fv/Fo decreases within all time measurments. In the presence of NaCl and PS-K until 60 min. of treatment there was a decrease in Fv/Fo value, then a slight increase was ob- served. The results of this study are important in understanding the protective function of PS-K on salt stress mechanism.
Keywords : Trianea bogotensis Karst, salt, polystimulin K, chlorophyll fluorescence