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چکیده
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In recent years, along with the development of nanotechnology, this technology has been used to promote environmental goals. In this research, in order to evaluate the effect of zinc oxide- and titanium dioxide-nanoparticles on white grape (cv. Sultana) seedlings under Cd stress, a factorial experiment was conducted based a completely randomized design with three replicates. The first treatment was cadmium stress at three levels (0, 50 and 100 mg/kg soil) and the second treatment was the spraying of the nanoparticles of zinc oxide and titanium dioxide at 3 levels (0, 50 and 100 mg L-1). The results showed that cadmium stress significantly reduced the leaf and root fresh weights, and shoot height. Foliar application of zinc oxide- and titanium dioxide-nanoparticles elevated growth characteristics, including the leaf and root fresh weights, and shoot length under cadmium stress. The maximum fresh weight of leaves and roots was recorded at the level 100 mg titanium nanoparticles and the maximum height of the shoot was at the level 100 mg zinc nanoparticles. Based on the results of this research, it seems that foliar spraying the nanoparticles of zinc oxide and titanium dioxide (especially at the concentration of 100 mg L-1), can improves the growth parameters under cadmium stress, and increases plant tolerance to harmful effect of this toxic metal in grape cv. Sultana.
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