Polyphenolic Profile and Antioxidant Activity of Leaf Purified Hydroalcoholic Extracts from Seven Mexican Persea americana Cultivars

Abstract

Persea americana (avocado) is a fruit consumed worldwide; however, since avocado leaves are apparently a natural ingredient that can be used as a traditional medicine, they can be a potential source of bioactive compounds. This study aimed to analyze the antioxidant activity of seven Mexican avocado leaf extracts by DPPH•, ABTS•+, and lipid peroxidation (LPO), and to identify the compound profile by liquid chromatography coupled to mass spectrometry/electron spray ionization. The highest free radical-scavenging activity was observed for Platano Delgado and Criollo 6 avocado cultivars havin IC50 values of 271.86 ± 13.69 and 269.56 ± 6.53 for DPPH• and ABTS•+ radicals, respectively, while the best result for lipid oxidation inhibition was registered in Criollo 6 cultivar extract. In this study forty-one compounds were detected in avocado leaves of the the seven cultivars analyzed, and of these compounds, eighteen phenolics were identified for first time in such plant material. The present study demonstrated that Mexican cultivars of Persea americana possess diverse polyphenolic compounds with strong antioxidant activity, which might be useful in the food and pharmaceutical industries.

Molecular level comparison of water extractives of maple and oak with negative and positive ion ESI FT‐ICR mass spectrometry

“…This chemical is also present in the maple extractives, but with a much lower magnitude (0.03% and 0.02% using negative and positive ion modes, respectively). The second abundant peak (C 22 H 31 O 12 , 6.7%) could be assigned to caffeoyl hexose‐deoxyhexoside, which is found in fruit tree biomass, such as avocado ( Persea americana ) . The formula (C 22 H 37 O 19 ) of the third peak (5.7%) is also in the top 25 formulas of the maple extractive with a relative abundance of 1.1%.…”

Avocado-Derived Biomass as a Source of Bioenergy and Bioproducts

“…Table 6. Phenolic compounds and other compounds characterized in avocado waste according to [80,81,84,[89][90][91][92]. Despite the fact that there are discrepancies between some of these studies as to whether the peel or stone have a higher concentration of phenolic compounds and capacity antioxidant, all agree that the extracts of these by-products have a greater antioxidant capacity and a higher concentration of phenolic compounds than the avocado pulp.…”

“…Furthermore, using ultrasound-assisted extraction, antioxidant extracts from avocado leaf were obtained. In these samples, phenolic acids, flavan-3-ols, flavones, and flavonols, among others, were characterized [89]. As a summary, Table 6 depicts the phenolic components characterized in avocado waste, including the phenolic compounds.…”

Ethanolic guava leaf extract with different chlorophyll removal processes: Antioxidant properties and its preventive effect on lipid oxidation in Pacific white shrimp

“…Polyphenol can be extracted from all the parts of plants (Jovanović et al ., 2017). Extracts from plant leaves have been intensively prepared and shown to exhibit promising antioxidant activities (Jovanović et al ., 2017; Castro‐López et al ., 2019; Stagos, 2020). The application of polyphenols for inhibiting lipid oxidation as well as retarding the proliferation of microorganisms in shrimp and fish has been demonstrated (Sae‐Leaw et al ., 2017; Shiekh et al ., 2019; Olatunde et al ., 2019b; Olatunde et al ., 2020a).…”