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Physicochemical properties and release characteristics of calcium alginate microspheres loaded with Trichoderma viride spores

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Journal of Integrative Agriculture 2019年第11期18卷 2534-2548页

作者： Slaven Juric Edyta Dermic Snjezana Topolovec-Pintaric Marta Bedek Marko Vincekovic Department of Chemistry University of Zagreb Faculty of AgricultureZagreb 10000Croatia Department of Plant Pathology University of Zagreb Faculty of AgricultureZagreb 10000Croatia

Novel agroformulations for simultaneous delivery of chemical and biologically active agents to the plants were prepared by encapsulation of Trichoderma viride spores in calcium alginate *** impact of calcium ions concentration on the viability and sporulation of *** spores as well as on the microsphere important physicochemical properties were *** interactions in microspheres are complex including mainly hydrogen bonds and electrostatic *** germination inside matrix and germ tubes penetration out of microspheres revealed calcium alginate microspheres provide a supportive environment for *** *** in physicochemical properties and bioactive agents release behaviour from microspheres were ascribed to the changes in microsphere *** to Korsmeyer-Peppas empirical model revealed the underlying *** release mechanism as anomalous transport kinetics(a combination of two diffusion mechanisms and the Type II transport(polymer swelling and relaxation of the polymeric matrix)).The increasing amount of *** spores in the surrounding medium is closely related to the release from microspheres and *** rate controlling mechanism of calcium release is Fickian diffusion.A decrease in the release rate with increasing calcium ion concentrations is in accordance with the calcium ions effect on the strength of the alginate network *** germination inside microsphere diminished the amount of released calcium ions and slowed release kinetics in comparison with microspheres prepared without *** results indicated investigated agroformulations have a great potential to be used for plant protection and nutrition.

关键词： agroformulations alginate microspheres calcium ions Trichoderma viride sustainability

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