Location and tissue effects on phytochemical composition and in vitro antioxidant activity of Moringa oleifera

Optimization of the extraction of antioxidants from Moringa leaves: A comparative study between ultrasound‐ and ultra‐homogenizer‐assisted extractions

“…Phenolic components can act as prooxidants under some conditions, they can accelerate the lipid oxidation processes and catalyze the production of oxygen radicals. Rutin The phytochemical profile herein reported (Table 4) agreed with previous works (Gómez-Martínez et al, 2020;Luiza et al, 2019;Rocchetti et al, 2019Rocchetti et al, , 2020 confirming the potential of distinct extraction techniques (traditional vs. emerging technologies) to recover bioactive compounds from Moringa leaves. It is worth mention that we had some difficulty comparing our results with the available data in the literature.…”

“…The majority of research performed on Moringa leaves employed exclusively in vitro spectrophotometric assays (e.g., Folin-Ciocalteu) to evaluate the TPC. Several authors have verified discrepancies in terms of nutrients and phenolic compounds in Moringa leaves grown in distinct countries (Brilhante et al, 2017;Gómez-Martínez et al, 2020;Rocchetti et al, 2020;Vázquez-León et al, 2019), confirming that not only the extraction approach but also the genetic and edafoclimatic conditions greatly impact the extracts' composition. For instance, Gómez-Martínez et al, (2020) investigated the phenolic profile by HPLC/MS of extracts from leaves and petioles of Moringa in three different locations of Spain.…”

“…Furthermore, researches focusing on these metabolites have evidenced their biological properties as an antioxidant (Liu et al, 2018), anti-inflammatory (Lin et al, 2018), antidiabetic (Muhammad et al, 2016), antiproliferative (Tiloke et al, 2018), and antimicrobial (Gupta et al, 2018). Nevertheless, like in all plant matrices, the profile and amount of phytochemicals in Moringa greatly differ according to genetic and environmental conditions, harvest and processing, and extraction conditions (Gómez-Martínez et al, 2020).…”

Calligonum polygonoides L. as Novel Source of Bioactive Compounds in Hot Arid Regions: Evaluation of Phytochemical Composition and Antioxidant Activity

“…Our result is in accordance with the recent reports, which suggested that higher phenolic content exhibited stronger antioxidant activity. A similar linear correlation was also reported in Moringa oleifera, Cyclocarya paliurus leaves, Juglans sigillata husk, Ocimum basilicum leaves, and Juglans regia [17,[28][29][30][31]. Moreover, the correlation coefficient between phenolic compounds and total antioxidant activity in CUPRAC and DPPH assay (r 2 > 0.91, p < 0.05) is stronger than that of antioxidant activity in FRAP assay (r 2 < 0.80, p < 0.05).…”

“…The phytochemicals obtained from plants are a source of raw material for the production of nutraceuticals and pharmaceutical products, which has an enormous therapeutic application to relieve certain sufferings that affect human health [17][18][19][20][21][22][23]. Economical and safe production of these plant-based bioactive compounds are the main challenges since under natural conditions production of these bioactive compounds in plant system (except some medicinal and aromatic plants) is relatively less (less than 1% of dry weight) and depends greatly on the physiological and developmental stage along with the environmental factors such as temperature, light intensity, soil water, soil salinity, and fertility.…”