Phytochemical composition and variability in Quercus ilex acorn morphotypes as determined by NIRS and MS-based approaches

López-Hidalgo, Cristina; Trigueros, Macedonia; Menéndez, Macarena; Jorrín‐Novo, Jesús V.

doi:10.1016/j.foodchem.2020.127803

Cited by 29 publications

(24 citation statements)

References 28 publications

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“…In addition, Quercus extract contains metabolites belonging to various chemical groups; the phenolic compounds (benzoics, cinnamics, coumarins, stilbenes, flavonoids, lignans and tannins) are the most representative. Other groups include carbohydrates, amino acids, fatty acids, carboxylic acids, and other secondary metabolites, terpenoids and alkaloids [44]. Some of these compounds have been previously reported as antimicrobial compounds in Q. ilex and another Quercus spp.…”

Section: Resultsmentioning

confidence: 97%

Antioxidant, Antihypertensive and Antimicrobial Properties of Phenolic Compounds Obtained from Native Plants by Different Extraction Methods

Boy

Casquete

Martínez

et al. 2021

IJERPH

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This study aims to evaluate the efficacy of two methods (agitation and ultra-sound) for extracting phenolic compounds from 15 native plants. Plant species collected in the Dehesa of Extremadura were used. The antioxidant, antihypertensive and antimicrobial activity of the phenolic extracts was investigated. Significantly different results were obtained when comparing the two extraction methods, with the highest concentrations of phenolic compounds found for ultrasound extraction. In addition, the extracts obtained for Cistus albidus, Cistus salviifolius, Rubus ulmifolius and Quercus ilex showed the highest concentrations of phenolic compounds. The antioxidant activity was higher in the extracts of Cistus and Q. ilex obtained by ultrasound, as was the antihypertensive activity. Antimicrobial activity was also higher in the extracts obtained by ultrasound from C. salviifolius and Q. ilex plants against bacteria and from Cistus ladanifer against yeasts. Therefore, it can be concluded that, with the ultrasound extraction of phenolic compounds from C. ladanifer, C. albidus and Q. ilex plants, it is possible to obtain extracts with important functional properties, so they could be studied for their use in food with the aim of obtaining healthy and safe products, favouring the sustainability of the environment of the Dehesa Extremeña.

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Section: Resultsmentioning

confidence: 97%

Antioxidant, Antihypertensive and Antimicrobial Properties of Phenolic Compounds Obtained from Native Plants by Different Extraction Methods

Boy

Casquete

Martínez

et al. 2021

IJERPH

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“…Its ecological importance is well acknowledged, while the economic importance is mainly related with acorn production for animal grazing. In fact, the Q. rotundifolia acorns are described as the sweetest among oaks, already used since the 18th century in the Iberian Peninsula as nuts associated with poor diets, and now gaining high value as a source of consumable flour within the local economies [10]. Another main economic interest of Q. rotundifolia, one that has prevailed for a long time, is related with the high density and the excellent calorific properties of the wood for charcoal production and firewood uses, for which the wood obtained from thinning or pruning operations is almost exclusively used [11].…”

Section: Introductionmentioning

confidence: 99%

Quercus rotundifolia Bark as a Source of Polar Extracts: Structural and Chemical Characterization

Sousa¹,

Ferreira²,

Miranda³

et al. 2021

Forests

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Quercus rotundifolia bark was studied regarding anatomical, chemical, and antioxidant properties from trees in two sites in southern Portugal and are here reported for the first time. The general structure and anatomy of Q. rotundifolia bark showed a rhytidome with sequential undulated and anastomosed periderms with a small proportion of cork, while the phloem included broad rays with strong cell sclerification, groups of sclereids with embed large prismatic crystals, and abundant druses in parenchyma cells. The mean chemical composition was 15.5% ash, 1.6% dichloromethane extractives, 6.4% ethanol and 9.3% water extractives, 3.0% suberin, 30.5% total lignin, and 33.8% carbohydrates. Carbohydrates included mainly glucose (50.7% of total monomers) and xylose (23.8%), with uronic (3.0%) and acetic acids (1.0%). Suberin was mainly composed of ω-hydroxyacids (48.0% of all compounds) and α,ω-diacids (19.5%). The main compounds found in the lipophilic extracts were triterpenes (43.6%–56.2% of all compounds) and alkanoic acids (32.7%–41.7%). Phenolic content was high especially in the ethanol extracts, ranging from 219.5–572.9 mg GAE/g extract and comprising 162.5–247.5 CE/g extract of flavonoids and 41.2–294.1 CE/g extract of condensed tannins. The extracts revealed very good antioxidant properties with IC50 values of 4.4 µg ethanol extract/mL and 4.7 µg water extract/mL. Similar anatomical, chemical, and antioxidant characteristics were found in the bark from both sites. The high phenolic content and excellent antioxidant characteristics of polar extracts showed holm oak barks to be a promising natural source of antioxidants with possible use in industry and pharmaceutical/medical areas.

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“…Fortunately, omics approaches have enabled crucial advances in these directions. Thus, some multiomics studies have addressed Q. ilex [19]; also, a reference transcriptome for this species has been generated [16,17], and, more recently, the metabolome of the acorn was determined [22]. In any case, the greatest efforts have focused on the proteomics of Q. ilex.…”

Section: Introductionmentioning

confidence: 99%

Proteomics Data Analysis for the Identification of Proteins and Derived Proteotypic Peptides of Potential Use as Putative Drought Tolerance Markers for Quercus ilex

San-Eufrasio

Bigatton

Guerrero‐Sanchez

et al. 2021

IJMS

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Drought is one of the main causes of mortality in holm oak (Quercus ilex) seedlings used in reforestation programs. Although this species shows high adaptability to the extreme climate conditions prevailing in Southern Spain, its intrinsic genetic variability may play a role in the differential response of some populations and individuals. The aim of this work was to identify proteins and derived proteotypic peptides potentially useful as putative markers for drought tolerance in holm oak by using a targeted post-acquisition proteomics approach. For this purpose, we used a set of proteins identified by shotgun (LC-MSMS) analysis in a drought experiment on Q. ilex seedlings from four different provenances (viz. the Andalusian provinces Granada, Huelva, Cadiz and Seville). A double strategy involving the quantification of proteins and target peptides by shotgun analysis and post-acquisition data analysis based on proteotypic peptides was used. To this end, an initial list of proteotypic peptides from proteins highly represented under drought conditions was compiled that was used in combination with the raw files from the shotgun experiment to quantify the relative abundance of the fragment’s ion peaks with the software Skyline. The most abundant peptides under drought conditions in at least two populations were selected as putative markers of drought tolerance. A total of 30 proteins and 46 derived peptides belonging to the redox, stress-related, synthesis,-folding and degradation, and primary and secondary metabolism functional groups were thus identified. Two proteins (viz., subtilisin and chaperone GrpE protein) were found at increased levels in three populations, which make them especially interesting for validation drought tolerance markers in subsequent experiments.

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Phytochemical composition and variability in Quercus ilex acorn morphotypes as determined by NIRS and MS-based approaches

Cited by 29 publications

References 28 publications

Antioxidant, Antihypertensive and Antimicrobial Properties of Phenolic Compounds Obtained from Native Plants by Different Extraction Methods

Antioxidant, Antihypertensive and Antimicrobial Properties of Phenolic Compounds Obtained from Native Plants by Different Extraction Methods

Quercus rotundifolia Bark as a Source of Polar Extracts: Structural and Chemical Characterization

Proteomics Data Analysis for the Identification of Proteins and Derived Proteotypic Peptides of Potential Use as Putative Drought Tolerance Markers for Quercus ilex

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