| Abstrakt: |
When facing different stresses, plants employ antioxidant mechanism. The present research studies the effect of salinity stress, caused by increased amounts of sodium chloride, on the antioxidative system as well as some physiological characteristics of selected pistachio seedlings (Badami-Riz-e- Zarand, Qazvini, Sarakhs, Atlantica UCB1, and Hybrids of Pistacia. vera cv. Badami-Riz-e-Zaarand × P. Integerrima, P. vera cv. Sharakhs× P. Integerrima, P. atlantica Desf. × P. Integerrima). It carries out a greenhouse experiment as a factorial-based on a completely randomized design with three replicates in cocopit and perlite media. The treatments are consisted of four salinity levels (0, 75, 150, and 225 mM NaCl) along with abovementioned root stocks. Salinity stress has been applied in the second year of seedling growth for nine weeks. The study measures some physiological and biochemical traits of the seedlings at the end of the experiment, its results showing that leaf area and total chlorophyll contents have decreased in all treated plants. Accordingly, under salinity stress Atlantica rootstock displays the greatest reduction, and Badami-Riz-e-Zarand, the lowest. Also, the study shows that by increasing salinity levels, the levels of proline, total phenol content, and antioxidant enzymes activity turn out to stand higher in Badami-Riz-e-Zarand × P. Integerrima, Badami-Riz-Zarand, and Qazvini, in comparison to other rootstocks. It seems that a hybrid of Badami-Riz-e- Zarand × P. Integerrima, Badami-Riz-Zarand, and Qazvini rootstocks is more capable of sustaining leaf water and proteins, being therefore more resistant to salinity stress. [ABSTRACT FROM AUTHOR] |
