Nitric oxide signalling in plant nanobiology: current status and perspectives

Abstract

Plant nanobiology as a novel research field provides scientific basis for the agricultural use of nanoparticles (NPs). Plants respond to the presence of nanomaterials by synthesizing signal molecules, such as the multifunctional gaseous nitric oxide (NO). Several reports have described the effects of different nanomaterials (primarily chitosan NPs, metal oxide NPs and carbon nanotubes) on endogenous NO synthesis and signalling in different plant species. Other works have demonstrated the ameliorating effect of exogenous NO donor (primarily sodium nitroprusside) treatments on NP-induced stress. NO-releasing NPs are more preferred alternatives to chemical NO donors and evaluating their effects on plants has recently begun. The accumulated literature data clearly indicate that endogenous NO production in the presence of nanomaterials or NO levels increased by exogenous treatments (NO-releasing NPs or chemical NO donors) exerts growth-promoting and stress-ameliorating effects in plants. Furthermore, a NP-based nanosensor for NO detection in plants has been developed, providing a new and excellent perspective for basic research and also for the evaluation of plants’ health status in agriculture.

Influence of metallic, metallic oxide, and organic nanoparticles on plant physiology

“…This scheme of CNTs and visible light can be used to introduce NO in plants in a controlled manner. Similarly, not only the positive regulation for MWCNTs was recently reported in seedlings of rapeseed but also the seedlings ameliorated salt stress by the involvement of NO (Kolbert et al, 2021).…”

“…Thus, among them, it was found that the modification of amine groups of chitosan by diethylenetriamine resulted in high NO loadings (Qun et al, 2008). Recently, CS-NPs have been reported to be effective in increasing the redox potential of Camellia sinensis and positively regulating the seed germination of pearl millet (Kolbert et al, 2021).…”

The redox status of salinity-stressed Chenopodium quinoa under salicylic acid and sodium nitroprusside treatments

“…Signaling molecules such as nitric oxide (NO) are found in all plants and implicated in various physiological, biochemical, and developmental processes, as well as responses to abiotic stress ( Hajihashemi et al., 2020b ; Kolbert et al., 2021 ). NO serves as a messenger of stress signals.…”

Reactive Oxygen, Nitrogen, and Sulfur Species (RONSS) as a Metabolic Cluster for Signaling and Biostimulation of Plants: An Overview

“…It has also been found that the reverse is true and that applying gibberellic acid induces the endogenous synthesis of H 2 S, reducing oxidative damage by boron toxicity [ 104 ]. · NO has also been associated with plant responses to nanomaterials (NMs), either in the induction of tolerance to stress by NMs or in the plant response to stress caused by NMs [ 105 ].…”