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Abstract
New promising manganese-containing nanobiocomposites (NCs) based on natural polysaccharides, arabinogalactan (AG), arabinogalactan sulfate (AGS), and κ-carrageenan (κ-CG) were studied to develop novel multi-purpose trophic low-dose organomineral fertilizers. The general toxicological effects of manganese (Mn) on the vegetation of potatoes (Solanum tuberosum L.) was evaluated in this study. The essential physicochemical properties of this trace element in plant tissues, such as its elemental analysis and its spectroscopic parameters in electron paramagnetic resonance (EPR), were determined. Potato plants grown in an NC-containing medium demonstrated better biometric parameters than in the control medium, and no Mn accumulated in plant tissues. In addition, the synthesized NCs demonstrated a pronounced antibacterial effect against the phytopathogenic bacterium Clavibacter sepedonicus (Cms) and were proved to be safe for natural soil microflora.
Highlights
Using the model system of potatoes (Solanum tuberosum L.) in vitro, we have studied the qualitative and quantitative influence of Mn and Mn-containing NCs on plant growth, obtained additional information on the migration of Mn ions, evaluated the general toxicological effect of this metal on the development of the plants, and found optimal conditions for Mn intake into the plants using S. tuberosum L. as an example
The concentration of Mn in the plant growth medium varied from the complete absence of Mn sulfate in the nutrient medium to a 100-fold excess over the control (Table 1)
(0.1 mol/L), and the experiments without Mn sulfate in the nutrient medium, in the control (0.1 mol/L), with 0.2–1 mol/L concentrations of the Mn sulfate salt, representing 13–15% of the total and with 0.2–1 mol/L concentrations of the Mn sulfate salt, representing 13–15% of the number of leaves on average
Summary
Despite the wide application of modern trace element-containing fertilizers, agriculture faces strong challenges associated with a need for optimal plant nutrition during the growing season. To address these challenges, researchers have great hopes for nano-sized materials [1,2,3,4,5]. Nowadays, taking into account the growing demand of the world market, great efforts are being directed towards the development of a new generation of complex mineral fertilizers Such fertilizers should improve plant uptake of trace nutrients in safe doses, ensure their delayed effect, and be resistant to the leaching of microelements from different types of soil. Nanochemistry faces such issues as the design of biocompatible, safe, and biodegradable nanosubstances
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