Delivery of Abscisic Acid to Plants Using Glutathione Responsive Mesoporous Silica Nanoparticles

文献类型： 外文期刊

第一作者： Sun, Dequan

作者： Sun, Dequan;Hussain, Hashmath I.;Rookes, James E.;Cahill, David M.;Sun, Dequan;Yi, Zhifeng;Kong, Lingxue

作者机构：

关键词： Mesoporous Silica Nanoparticles;Agrochemical Delivery;Plant System;Glutathione Responsive;Controlled Release

期刊名称：JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY （ 影响因子：1.134； 五年影响因子：0.999 ）

ISSN： 1533-4880

年卷期： 2018 年 18 卷 3 期

页码：

收录情况： SCI

摘要： An intracellular glutathione (GSH) responsive phytochemical delivery system based on thiol gated mesoporous silica nanoparticles (MSNs) was developed and tested on the model plant Arabidopsis thaliana. In the present study, monodispersed MSNs with particle diameters of similar to 20 nm and pore sizes of similar to 2.87 nm were synthesized and modified. Abscisic acid (ABA), a key phytohormone, was entrapped in the mesopores of MSNs and then the pore entrances of MSNs were covered with decanethiol gatekeepers through GSH-cleavable disulfide linkages. An in vitro release test of ABA from decanethiol gated MSNs proved that there was efficient loading and entrapment of phytochemicals in the absence of a GSH redox trigger. Most importantly, in planta experiments demonstrated that GSH-mediated release of ABA from the pores of MSNs significantly reduced the leaf stomatal aperture and inhibited water loss of treated plants. Moreover, compared with the usage of free ABA, the controlled release of the encapsulated phytohormone from MSNs markedly prolonged the expression of the ABA inducible marker gene (AtGALK2) and finally, improved the drought resistance ability of Arabidopsis seedlings under drought stress. Therefore, the concept of using short-chain molecules as gatekeepers to encapsulate biomolecules in MSNs was demonstrated. The application of MSNs with redox-responsive gatekeepers has been shown in this study to be a potential and efficient technique to deliver phytochemicals into plants and release them in a controllable fashion.

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