Encapsulation of S-nitrosoglutathione into chitxosan nanoparticles improves drought tolerance of sugarcane plants

Publication date: Available online 9 January 2019Source: Nitric OxideAuthor(s): Neidiquele M. Silveira, Amedea B. Seabra, Fernanda C.C. Marcos, Milena T. Pelegrino, Eduardo C. Machado, Rafael V. RibeiroAbstractThe entrapment of NO donors in nanomaterials has emerged as a strategy to protect these molecules from rapid degradation, allowing a more controlled release of NO and prolonging its effect. On the other hand, we have found beneficial effects of S-nitrosoglutathione (GSNO) – a NO donor – supplying to sugarcane plants under water deficit. Here, we hypothesized that GSNO encapsulated into nanoparticles would be more effective in attenuating the effects of water deficit on sugarcane plants as compared to the supplying of GSNO in its free form. The synthesis and characterization of chitosan nanoparticles containing GSNO were also reported. Sugarcane plants were grown in nutrient solution, and then subjected to the following treatments: control (well-hydrated); water deficit (WD); WD + GSNO sprayed in its free form (WDG) or encapsulated (WDG-NP). In general, both GSNO forms attenuated the effects of water deficit on sugarcane plants. However, the encapsulation of this donor into chitosan nanoparticles caused higher photosynthetic rates under water deficit, as compared to plants supplied with free GSNO. The root/shoot ratio was also increased when encapsulated GSNO was supplied, indicating that delayed release of NO improves drought tolerance of sugarcane plants. Our res...

Source: Nitric Oxide - January 10, 2019 Category: Chemistry Source Type: research