The Effect of Salinity on Potassium, Sodium Accumulation and Aerial Parts Yield of Two Triticale (Triticosecale wittmack X ) Ecotypes during Different Growth Stages

Subject Areas : Journal of Plant Ecophysiology

Safora Farhang mehr ¹ , Shiva Akbari ² , Shahram Rezvan Beidokhti ³

1 - دانشکده کشاورزی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران
2 - دانشکده کشاورزی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران
3 - دانشکده کشاورزی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران

Received: 2015-03-03 Accepted : 2015-05-08 Published : 2016-06-01

Keywords: Stress, Relative water content, NaCl, Ions concentration,

Abstract :

Salinity is one of the main ecological factors that threaten the stability in dry and semi-dry lands and specifically in the lands that evaporation and transpiration dominate rainfall. In order to study the effect of different salinity levels on sodium and potassium concentration, aerial yield and relative water content of two triticale ecotypes, an experiment was performed basis on a complete randomized design with two factors and three replications in research greenhouse of the Islamic Azad university of Damghan. The first factor consisted of different salinity levels (0, 3, 6, 9, 11, 14 ds/m) built-up with pure NaCl and the second factor was two triticale ecotypes (Esfahan and Varzaneh). The result showed that by increasing the salinity the aerial yield and relative water content significantly decreased at all three growth stages which were before flowering, start of pregnancy and seed fermentation. At all three growth stages, the salinity significantly increased the concentration of sodium and potassium ions in the leaves of plant. The effect of ecotype and the interaction effect of salinity and ecotype were also significant on content of potassium at all growth stages but the interaction effect of salinity and ecotype on the sodium content was significant only at seed fermentation stage. The concentration of potassium ions was higher in Esfahan ecotype in all growth stages in comparison with the other ecotype. Therefore, it can be concluded that Esfahan ecotype is more tolerant to salinity stress at all growth stages in comparison with Varzaneh ecotype.