Effect of titanium dioxide nanoparticles (TiO2NPs) application on the polyphenolic, phytochemical and SO6 protein compounds content in Saponaria officinalis hairy roots

Saponaria officinalis is a perennial plant of the clove family. Hairy root culture system is a suitable alternative to improve the production of compounds with medicinal value. Extensive application of nanotechnology in hairy root culture is a suitable substrate for the production of active elements. In this study, the effect of different concentrations of titanium dioxide nanoparticles (0, 10, 20, 30 and 50 mg / l) and two exposure times (24 and 48 hours) on growth rate, antioxidant capacity, phenol and flavonoid content, antioxidant enzymes activity, polyphenol compounds content and the amount of SO6 protein in soapy hairy roots were investigated. The highest and lowest fresh weight of hairy roots (3.09 and 0.96 g, respectively) were found in culture medium treated with 10 and 20 mg / l titanium dioxide nanoparticles at 48 and 24 hours of exposure time, respectively. The highest total Phenol (9.79 mg GAE per g FW) and flavonoid (1.06 mg Que per g FW) content were observed in hairy roots treated with 50 and 30 mg / l titanium dioxide nanoparticles at 24 and 48 hours of exposure time respectively. The highest amount of most polyphenols including rosmarinic acid, cinnamic acid and rutin were achieved during 24 hours of treatment. The highest levels of SO6 protein was obtained in hairy roots treated with 50 mg/l titanium dioxide nanoparticles after 48 hours. By laboratory optimization of hairy root production of soap plant, SO6 can be produced in fermenter.