2025 Ecosystem Transformation 8 (3), 198-208

The effect of manganese and cadmium on morphological and biochemical parameters of barley seedlings

Tovstik Е.V., Olkova A.S.  

The influence of various concentrations of Mn2+ (100–800 mg/l) and Cd2+ (10–80 mg/l) on spring barley Hordeum vulgare L., variety ‘Rodnik Prikamya’ was studied in the roll culture under laboratory conditions. Seed germination, seedling biomass, and the content of free and bound polyphenols in plant biomass were estimated. The effect of low-dose manganese (100 mg/l) turned out to be stimulating: seed germination and biomass of barley seedlings increased by 35 and 51% compared to the control. Elevated concentrations of Mn2+ (200–800 mg/l) suppressed seed germination and biomass (by 55–75% and 60–79%). Cadmium (10–80 mg/l) made solely inhibitory impact: seed germination decreased by
20–70% and seedling biomass by 23–78%. Biochemical responses of plants to stress caused by these elements differed. For instance, application of Mn2+ increased the proportion of bound polyphenols in the total polyphenol of seedlings by 8, 12, 7, and 8% compared to the control. Cadmium stress was compensated by polyphenols only at its lowest tested concentration (20 mg/L); the proportion of bound polyphenols increased by 3.3%, as compared to the control. In case with the highest concentrations of the studied metal ions (500–800 mg/L for Mn2+ and 50–80 mg/L for Cd2+), the content of polyphenols dropped to control values thereby indicating the depletion of adaptive reserves of plants.

E. V. Tovstik
Vyatka State University
Moskovskaya 36, Kirov, 610000 Russia


A. S. Olkova
Vyatka State University
ul. Moskovskaya 36, Kirov, 610000 Russia

morgan-abend@mail.ru

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