We investigated the effect of γ-irradiation (4–50 Gy) of barley seeds (Hordeum vulgare L., cv. Nur) on the content of endogenous phytohormones–stimulators of plant growth and development: indol-3-acetic acid (IAA), indolyl-3-butyric acid (IBA), zeatin and abscisic acid (ABA). The ratio (IAA + IBA + zeatin)/ABA from the third to the seventh day of germination has been measured. It was shown that the changes in the content of phytohormones as a function of the radiation dose were nonlinear. In the dose range of 4–20 Gy, phytohormones balance was changed due to increased content of growth stimulators and decreased ABA content. Using a dose of 50 Gy led primarily to a decrease in the content of growth stimulators and an increase in ABA content, and the ratio (IAA + IBA + zeatin)/ABA shifted toward ABA content.
Russian Journal of Plant Physiology – Springer Journals
Published: Jun 1, 2018
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