Impact of a Longwave UV-B Radiation on Soybean Plants Grown at Increased Nickel Concentration in Soil

Abstract

Plants of soybean (Glycine max L.) cv. Augusta grew in the soil with addition of Ni in the concentration of 80 (C-80) or 120 mg•kg -1 dry mass (C-120) or without Ni (C-0), and they were subjected to UV-B (300 nm -315 nm) dose of 1.8 kJ m -2 d -1 for 28 days. The addition of nickel into soil in the concentration of 120 mg kg -1 (C-120) caused a decrease of the plant height by 35% compared to the control (C-0), and in the presence of UV-B (U-120) -by 43%. The shoot fresh and dry mass in the C-80 and C-120 plants were lower by 33% and 52% than in the C-0. In the presence of Ni, the intensity of net photosynthesis decreased by 55%. UV-B caused an increase of flavonoid content by 25% compared to the control (C-0), and Ni induced a reduction in the content of these compounds from 20% to 40%.

Perspective on the influence of ultraviolet radiations in plant growth and development

“…Usually, UV-B exposure negatively affects plant growth, developmental processes, and morphology (Zuk-Golaszewska et al, 2003;Cechin et al, 2007;Salama et al, 2011;Chaudhary, Agrawal, 2015;Dotto, Casati, 2017). For example, it was found that the total dry weight of four cucumber cultivars (Krizek et al, 1997), the fresh and dry weight of soybean plants (Zhang et al, 2014;Skórska et al, 2019), and aerial dry mass of lettuce (Tsormpatsidis et al, 2008) were significantly decreased by UV-B in field attenuation studies. An apparent disparity in growth parameters was observed among rice varieties after exposure to UV-B (Hidema, Kumagai, 2006;Faseela, Puthur, 2019).…”