Design of a Multifunctional Nanohybrid System of the Phytohormone Gibberellic Acid Using an Inorganic Layered Double-Hydroxide Material

Abstract

To offer a multifunctional and applicable system of the high-value biotechnological phytohormone gibberellic acid (GA), a nanohybrid system of GA using the inorganic Mg-Al layered double-hydroxide material (LDH) was formulated. The ion-exchange technique of LDH was applied to synthesize the GA-LDH hybrid. The hybrid structure of GA-LDH was confirmed by different spectroscopic techniques. The nanohybrid size was described by SEM to be ∼0.1 μm. The GA-LDH nanohybrid structure was the key parameter that controlled GA properties. The layered molecular structure of LDH limited the interaction of GA molecules in two-dimensional directions. Accordingly, GA molecules did not crystallize and were released in an amorphous form suitable for dissolution. At various simulated soil solutions, the nanohybrids showed a sustained release process following Higuchi kinetics. The biodegradation process of the intercalated GA showed an extended period of soil preservation as well as a slow rate of degradation.

Formulation of Polyacrylic Acid-Layered Double Hydroxide Composite System as a Soil Conditioner for Water Management

“…It possesses excellent anion exchanging properties and can be used as matrixes, polymer stabilizers and carriers. In addition, LDH is reported in a number of studies as a soil biocompatible and nontoxic material 5,6 .…”

An efficient strategy of managing irrigation water based on formulating highly absorbent polymer–inorganic clay composites

“…Among the various approaches for exploiting developments in the agriculture field, clay layered double hydroxide (LDH) materials offer some unique advantages (Prevot et al, 2001;Rives, 2002;Hsueh and Chen, 2003;Hafez et al, 2010). LDHs are a family of natural and synthetic compounds having the general formula ½M ðIIÞ 1Àx M ðIIIÞ x ðOHÞ 2 ðY nÀ Þ x=n .…”

γ-Polyglutamic acid/chitosan nanoparticles for the plant growth regulator gibberellic acid: Characterization and evaluation of biological activity

“…A conjugated system with chitosan has been described for the controlled release of GA 3 (Liu et al, 2013a). Hafez, Berber, Minagawa, Mori, and Tanaka (2010) developed a nanohybrid system for GA 3 using an inorganic magnesium-aluminum layered double-hydroxide material, which resulted in sustained release and slow degradation of the hormone. Despite these studies, the development of biopolymer-based nanoparticles as carrier systems for GA 3 has not yet been described.…”