Naslov
Encapsulation of chemical and biological agents for plant protection and nutrition

Autori
Vinceković, Marko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni

Skup
Plant and Molecular Biology

Mjesto i datum
Pariz, Francuska, 22.02.2018. - 24.02.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
sodium alginate, chitosan, copper, calcium, Trichoderm viride, controlled release

Sažetak
Trends of encapsulation in agriculture are focused on the preparation of microcapsule formulations involving two active agents. Despite numerous methods of chemical agent encapsulation, there are only a few data in the literature about simultaneous encapsulation and delivery of biological and chemical agents. The main problems that should be solved here are: (i) to choose microcapsules that can incorporate biological and chemical active agents and (ii) the presence of active agents in the same compartment should not diminish their activities. Due to benefits for crop protection and nutrition as well as high compatibility, T. viride and copper or calcium ions were taken as a suitable couple of the chemical and biological agent. Simultaneous encapsulation in chitosan/alginate microcapsules revealed that encapsulation in the same compartment does not inhibit activity either of Trichoderma viride spores nor gelling cations. Controlled release, that is the successful delivery of active agents at the right place and the right time is necessary characteristic for all bioactive agents’ delivery systems. To obtain the well-designed microcapsules efficient for simultaneous encapsulation and delivering active agents to plants at the rate that closely approximates plant demand, it is important to optimize parameters during microcapsule preparation. The concentration of gelling cation, microcapsule size, and presence of chitosan layer were considered as variables with possible influence on the essential microcapsule parameters. The gelation of a fixed amount of sodium alginate at different concentrations of gelling cation in solution resulted in distinct kinetics and release mechanisms. The increase in the concentration of gelling cation promoted, but the presence of the chitosan layer on microcapsule surface and increase in microcapsule size reduced the rate of an active agent release. Fitting to simple Korsmeyer–Peppas empirical model revealed the underlying release mechanism depends on the concentration of gelling cation and presence of T. viride spores as well as chitosan layer. The investigation pointed out that proper selection of formulation variables helps in designing microcapsules with the controlled release of gelling cations and T. viride for plant protection and nutrition.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA