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Kudasova, Darikha; Mutaliyeva, Botagoz; Vlahoviček-Kahlina, Kristina; Jurić, Slaven; Marijan, Marijan; Khalus, Svetlana V; Prosyanik, Alexander V; Šegota, Suzana; Španić, Nikola; Vinceković, Marko
International journal of molecular sciences, 03/2021, Letnik: 22, Številka: 5Journal Article
A new copper complex, trans-diaqua-trans-bis 1-hydroxy-1,2-di (methoxycarbonyl) ethenato copper (abbreviation Cu(II) complex), was synthesized and its plant growth regulation properties were investigated. The results show a sharp dependence of growth regulation activity of the Cu(II) complex on the type of culture and its concentration. New plant growth regulator accelerated the development of the corn root system (the increase in both length and weight) but showed a smaller effect on the development of the wheat and barley root systems. Stimulation of corn growth decreased with increasing Cu(II) complex concentration from 0.0001% to 0.01% (inhibition at high concentrations-0.01%). The development of corn stems was also accelerated but to a lesser extent. Chitosan-coated calcium alginate microcapsules suitable for delivery of Cu(II) complex to plants were prepared and characterized. Analysis of the FTIR spectrum showed that complex molecular interactions between functional groups of microcapsule constituents include mainly electrostatic interactions and hydrogen bonds. Microcapsules surface exhibits a soft granular surface structure with substructures consisting of abundant smaller particles with reduced surface roughness. Release profile analysis showed Fickian diffusion is the rate-controlling mechanism of Cu(II) complex releasing. The obtained results give new insights into the complexity of the interaction between the Cu(II) complex and microcapsule formulation constituents, which can be of great help in accelerating product development for the application in agriculture.
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