Influence of Organic and Chemical Fertilisation on Antioxidant Compounds Profiles and Activities in Fruits of Fragaria ananassa var. Camarosa

Abstract

Non-communicable diseases (NCDs) present a long duration and a slow progression. Good nutrition plays a predominant role in NCD prevention. In Chile, the cultivation of strawberry (Fragaria ananassa) has recently been adapted to volcanic soils with low available phosphorus (P), which can affect the fruit quality in terms of their antioxidant compound content and anti-inflammatory activities. Here, we carried out a study using organic (OF) or chemical (TF) fertilisers at 50 and 100% of the agronomical dose recommendation and without fertilisation (WF) under field conditions. Identification of phenolic compounds was done by HPLC-DAD-ESI-MS/MS, whereas antioxidant activities were determined by spectrophotometric methods. The highest concentrations of anthocyanins and ascorbic acid were obtained in the OF treatments, showing a relationship with the CUPRAC (cupric reducing antioxidant capacity) values. The highest concentrations of total polyphenols were obtained in the TF treatments, according to the TEAC (Trolox equivalent antioxidant capacity), CUPRAC and 2,2-diphenyl-1-picrylhydrazyl tests. The highest enzymatic activities were observed also in the TF treatments. Compared with WF, TF treatment downregulates the cytokine interleukin 10 (IL-10) significantly at a dose of 100%, but we could not show a significantly downregulation yet. Our results suggest that enzymatic antioxidant activity responds better to a period of prolonged exposure to P fertilisation. There is no direct correlation between enzymatic and non-enzymatic antioxidant activity with respect to treatments with different types of P fertilisation.

Organic cultivation practices enhanced antioxidant activities and secondary metabolites in giant granadilla (Passiflora quadrangularis L.)

“…It is therefore conceivable that the result of this study showed that the P. quadrangularis cultivated in organic system, producing higher phenolic and flavonoid contents in comparison to conventional cultivation. The same trend was observed in organically produced fruits, e.g., passion fruit [14], raspberries [15] and strawberry [38]. Several findings have linked the accumulation of phenolics and flavonoids to the level of available N in the soil [39].…”

“…cyanogenic glycosides and harmine alkaloids were identified to be the major secondary metabolites in Passiflora leaves and possess bioactive properties [21,52,56]. The metabolites profiles have been reported varied with species, variants and cultivation system [38,57]. Further elucidation on the secondary metabolites in the extracts of P. quadrangularis leaves and edible parts (mesocarp and pulp) from organic cultivation were conducted.…”

PGPR-Mediated Salt Tolerance in Maize by Modulating Plant Physiology, Antioxidant Defense, Compatible Solutes Accumulation and Bio-Surfactant Producing Genes

“…Plants exhibit excellent oxidative stress defense mechanisms, including enzymatic antioxidants that inhibit ROS generation [ 48 ]. The antioxidant defense system (APX, POD, SOD, and ascorbic acid) can be improved to regulate reactive oxygen species (ROS), which induce oxidative stress under salinity stress.…”

Antioxidant Responses of Phenolic Compounds and Immobilization of Copper in Imperata cylindrica, a Plant with Potential Use for Bioremediation of Cu Contaminated Environments

“…Among the compounds identified, cyanidins were also an important group. This group of anthocyanins have been described as responsible for the red coloring on leaves of diverse higher plants [ 42 , 43 ], probably playing the same role in the evident reddish coloration in shoots of I. cylindrica . At the same time, anthocyanins are pigments recognized for their protective role against UV radiation and excessive light, and it has been observed that their biosynthesis is stimulated by environmental stresses such as drought, attack by pathogens and insects [ 44 ].…”