Mehdi SALAJEGHEH, Mohammadreza YAVARZADEH ⃰, Arezo PAYANDEH and Mohammad Mehdi AKBARIAN
Department of Agriculture, Bam Branch, Islamic Azad University, BAM, IRAN
Abstract. Environmental stresses change antioxidant and non–enzymatic activities of plant cells. Nanoparticles may help plants against drought stress. This study was conducted to evaluate the effect of titanium and silicon nanoparticles on antioxidant enzymes activity and some biochemical properties of Cuminum cyminum L. under drought stress. This study was conducted based on randomized complete block design in an arrangement of split plot with three replications, and irrigation content (50, 100, and 150 mm evaporation), and foliar applications of titanium and silicon nanoparticles, and soil application of superabsorbent polymer as factors. The results showed that levels of water, titanium, silicon nanoparticles, superabsorbent polymer, and their interactions were efficient on growth of Cuminum cyminum L. Drought stress decreased relative humidity, but increased antioxidant enzyme activity, leaf proline, and carbohydrate. Application of titanium nanoparticles increased leaf proline. It was observed a significant interaction between water availability, and fertilizers on ascorbate enzyme activity (P<0.05), so that most activity (0.193 µmol/mg) was observed in 100 mm evaporative pan and foliar application of titanium. In sum, drought stress increased carbohydrate, antioxidant enzymes activity and proline contents, and decreased relative water contents.
Keywords: Antioxidant enzymes, Cuminum cyminum, Evaporative pan, Nanotechnology, Proline