title: Impact of Metal Nanoform Colloidal Solution on the Adaptive Potential of Plants.
abstract: Nanoparticles are a known cause of oxidative stress and so induce antistress action. The latter property was the purpose of our study. The effect of two concentrations (120 and 240 mg/l) of nanoform biogenic metal (Ag, Cu, Fe, Zn, Mn) colloidal solution on antioxidant enzymes, superoxide dismutase and catalase; the level of the factor of the antioxidant state; and the content of thiobarbituric acid reactive substances (TBARSs) of soybean plant in terms of field experience were studied. It was found that the oxidative processes developed a metal nanoparticle pre-sowing seed treatment variant at a concentration of 120 mg/l, as evidenced by the increase in the content of TBARS in photosynthetic tissues by 12 %. Pre-sowing treatment in a double concentration (240 mg/l) resulted in a decrease in oxidative processes (19 %), and pre-sowing treatment combined with vegetative treatment also contributed to the reduction of TBARS (10 %). Increased activity of superoxide dismutase (SOD) was observed in a variant by increasing the content of TBARS; SOD activity was at the control level in two other variants. Catalase activity decreased in all variants. The factor of antioxidant activity was highest (0.3) in a variant with nanoparticle double treatment (pre-sowing and vegetative) at a concentration of 120 mg/l. Thus, the studied nanometal colloidal solution when used in small doses, in a certain time interval, can be considered as a low-level stress factor which according to hormesis principle promoted adaptive response reaction.
authors.affiliation: Institute of Biology, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, Kyiv, 01601, Ukraine. tarantul@univ.kiev.ua.
authors.forename: Nataliya
authors.initials: N
authors.lastname: Taran
authors.affiliation: Institute of Biology, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, Kyiv, 01601, Ukraine. l.batsmanova@gmail.com.
authors.forename: Ludmila
authors.initials: L
authors.lastname: Batsmanova
authors.affiliation: Institute of Biology, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, Kyiv, 01601, Ukraine. mariia.s.kovalenko@gmail.com.
authors.forename: Mariia
authors.initials: M
authors.lastname: Kovalenko
authors.affiliation: Institute of Biology, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, Kyiv, 01601, Ukraine. a_okanenko@yahoo.co.uk.
authors.forename: Alexander
authors.initials: A
authors.lastname: Okanenko
keywords: Catalase; Factor of antioxidant activity; Lipid peroxidation; Nanoparticles; Pigments; Plants; Superoxide dismutase