Abstract
The global market for plant-derived bioactive compounds is growing significantly. The use of plant secondary metabolites has been reported to be used for the prevention of chronic diseases. Silver nanoparticles were used to analyze the content of enhancement phenolic compounds in carrots. Carrot samples were immersed in different concentrations (0, 5, 10, 20, or 40 mg/L) of each of five types of silver nanoparticles (AgNPs) for 3 min. Spectrophotometric methods measured the total phenolic compounds and the antioxidant capacity. The individual phenolic compounds were quantified by High Performance Liquid Chromatography (HPLC) and identified by –mass spectrometry (HPLC-MS). The five types of AgNPs could significantly increase the antioxidant capacity of carrots’ tissue in a dose-dependent manner. An amount of 20 mg/L of type 2 and 5 silver nanoparticle formulations increased the antioxidant capacity 3.3-fold and 4.1-fold, respectively. The phenolic compounds that significantly increased their content after the AgNP treatment were chlorogenic acid, 3-O-caffeoylquinic acid, and 5′-caffeoylquinic acid. The increment of each compound depended on the dose and the type of the used AgNPs. The exogenous application of Argovit® AgNPs works like controlled abiotic stress and produces high-value secondary bioactive compounds in carrot.
Highlights
Health agencies worldwide have encouraged the population to consume vegetables and fruits as part of a healthy diet
The negative control treatment consisted of carrot samples immersed in water (0 mg/L of silver nanoparticles)
Carrots were exposed to four different concentrations of the corresponding AgNPs formulation for three minutes compared with the negative control treatment
Summary
Health agencies worldwide have encouraged the population to consume vegetables and fruits as part of a healthy diet. Many reports have described that the sufficient daily consumption of vegetables and fruits could help prevent chronic diseases: heart disease, cancer, diabetes, obesity, several micronutrient deficiencies, etc. The reports suggest that the prevention of chronic diseases by consuming vegetables and fruits is related to their content of secondary metabolites, to which a beneficial bioactivity for health is attributed [2,3,4]. Phenolic compounds have been widely reported for their antioxidant, antiproliferative, and hepatoprotective activity, among others [5,6,7]. Due to their properties, these secondary metabolites represent an important impact on the global economy. According to a British Broadcasting Corporation (BBC) report, the global market
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