Document Type : Research Paper
Authors
1
Agriculture, Faculty of Agriculture, Varamin (Pishva), Azad University Tehran, Iran
2
Department of Agriculture, Faculty of Agriculture, Varamin(Pishva) Azad University, tehran, iran
3
Agriculture, Faculty of Agriculture, Varamin Azad (Pishva) University , Tehran, Iran
4
Agriculture, Faculty of Agriculture, Varamin (Pishva) Azad University , Tehran, Iran
Abstract
This study was conducted to investigate the effect of priming growth regulators auxin, gibberellin, and cytokinin and spraying zinc nanoparticles, magnesium, under drought stress conditions (at three levels of 40, 60, and 80 mm from the evaporation pan) on the fresh and dry weight of aerial parts, the number of lateral branches containing alkaloids, RWC, plant height and stem diameter of the medicinal plant Perwinkle as a factorial and completely randomized design over two years (1399 and 1400) . The results showed that the main effects of seed priming with growth regulators, foliar spraying and drought stress on all the mentioned traits had a significant effect at the probability level of %1. The mutual effects of seed priming with growth regulators and drought stress showed a statistical difference of %1 compared to the control treatment, except for shoot fresh weight and plant height. In the investigation of the double interaction of drought stress and nanoparticles, as well as the mutual effects of growth regulators and nanoparticles on the dry weight of aerial parts at the probability level of %5 and on RWC at the probability level of %1, a difference was observed compared to the control treatment. Also, in the triple interaction of drought stress, growth regulators, and foliar application of nanoparticles and drought stress on shoot dry weight and relative water content, a significant difference was observed at the %1 probability level compared to the control treatment, and there was no significant difference in other traits.
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