Original scientific paper
Exposure of Paulownia Seedlings to Silver Nitrate Improves Growth Parameters via Stimulation of Mild Oxidative Stress
Viktor V. Husak
; Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
Uliana Ya. Stambulska
; Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
Angelika M. Pitukh
; Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
Volodymyr I. Lushchak
; Department of Biochemistry and Biotechnology, Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine; Research and Development University, Ivano-Frankivsk, Ukraine
Abstract
In the present study we investigated the morpho-physiological and biochemical responses of microсlonally produced seedlings of Paulownia Pao Tong Z07 under exposure to silver nitrate (AgNO3 ) in various concentrations (1, 10, 50 mg L-1) in the growth media. The exposure to AgNO3 at all studied concentrations resulted in a significant enhancement in seedling growth, as evidenced by notable increments in shoot length, stem mass and leaf mass. Seedlings treated with AgNO3 showed higher catalase activities, ascorbate peroxidase, and ascorbate oxidase. At the same time, the activities of superoxide dismutase and glutathione S-transferase, the concentrations of low molecular mass thiols and carotenoids dropped in plants exposed to AgNO3 . The levels of chlorophylls a and b were unaffected by any silver nitrate concentration. The results suggest that silver nitrate, at concentrations of 10 and 50 mg L-1, has modulating effects on the antioxidant defense of Paulownia.
Keywords
Hrčak ID:
321025
URI
Publication date:
30.9.2024.
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