Phenolics of selected species of Persicaria and Polygonum (Polygonaceae) in Egypt

Hussein, Sameh R.; El-Magly, Usama I.; Tantawy, M.; Kawashty, Salwa A.; Saleh, Nabiel A.M.

doi:10.1016/j.arabjc.2012.06.002

Cited by 25 publications

(12 citation statements)

References 15 publications

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“…Polygonum equisetiforme is also used to treat some illnesses such as sore throat, common colds, and coughs (Khafagi and Dewedar, 2000). Current studies have shown that shoot extracts of Egyptian P. equisetiforme are rich in phenolic contents (Hussein et al, 2017); in fact, some flavonoid compounds have important antioxidant activities (El-Toumy et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Changes in phenolic profile, soluble sugar, proline, and antioxidant enzyme activities of Polygonumequisetiforme in response to salinity

Boughalleb¹,

Abdellaoui²,

Mahmoudi³

et al. 2020

Turk J Bot

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This study intended to focus on the effect of different levels of NaCl (0-400 mM, at regular intervals every 100 mM) on the growth, secondary metabolites, and antioxidant enzyme activities of Polygonum equisetiforme, a wild plant with medicinal and industrial uses, which often grows in harsh environmental conditions. Our results showed that biomass production significantly decreased with salinity, while the leaf relative water content declined only at high levels of NaCl concentration (300-400 mM). In contrast, these higher doses of salt resulted in a significant increase in malondialdehyde (MDA) content. Both proline and soluble sugar (e.g., fructose, glucose, and sucrose) contents were enhanced under saline conditions. The methanolic extracts of the shoots included 10 flavonoids and 9 phenolic acids. The total phenolic acids (TPA), total flavonoid compounds (TFC), and total phenolic compounds (TPC) increased with salinity, particularly at 300 mM NaCl. An increase in TPA resulted especially from an increase in quinic, gallic, and protocatechuic acids (phenolic compounds), followed by quercetin-3-O-galactoside, catechin, and epicatechin (flavonoid compounds). Superoxide dismutase (SOD) activity increased only at high salinity levels (>200 mM), while glutathione reductase (GR), guaiacol peroxidase (GPX), catalase (CAT), and ascorbate peroxidase (APX) activity increased with salinity level. A positive significant correlation between antioxidant DPPH and TPA, TFC, TPC, CAT, and APX suggests a vital protective role in controlling oxidative stress through the scavenging process. Consequently, our results indicated that P. equisetiforme shoots are rich in secondary metabolites, especially phenolic compounds with high potential antioxidant activities. It can be considered a salt-tolerant species able to survive at salinity levels up to 300 mM NaCl.

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Section: Introductionmentioning

confidence: 99%

Changes in phenolic profile, soluble sugar, proline, and antioxidant enzyme activities of Polygonumequisetiforme in response to salinity

Boughalleb¹,

Abdellaoui²,

Mahmoudi³

et al. 2020

Turk J Bot

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“…Insecticidal activity of crude extracts of P. maculosa against the red flour beetle ( Tribolium castaneum ) was reported [ 18 ], and recently lectin extracts from this plant have been found to affect the antioxidant system of the cotton bollworm ( Helicoverpa armigera ) [ 19 ]. Previous studies report several flavonoids in the aerial parts of P. maculosa [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Phenolic Fingerprinting, Antioxidant, and Deterrent Potentials of Persicaria maculosa Extracts

Quesada-Romero

Fernández-Galleguillos

Bergmann

et al. 2020

Molecules

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Persicaria maculosa (Polygonaceae) (known as lady’s thumb) is an annual morphologically variable weed that is widely distributed in Chile. The purpose of this study was to investigate the antifeedant potential of methanolic (MeOH), ethanolic (EtOH), and dichloromethane (DCM) extracts from the aerial parts of this plant collected in the Valparaíso and Curicó provinces (Chile) and relate this activity to the antioxidant capacity and the presence of phenolic compounds in the extracts. A phenolic profile based on HPLC-ESI-MS/MS allowed the identification of 26 phenolic compounds, most of them glycosyl derivatives of isorhamnetin, quercetin, and kaempferol. In addition, the total phenolic content (TP), total flavonoids (TF), and antioxidant activity measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide anion scavenging (O2−), ferric-reducing antioxidant power (FRAP), and cupric-reducing antioxidant capacity (CUPRAC) of the extracts are reported. The antifeedant potentials of the plant extracts were tested against Epilachna paenulata, Pseudaletia adultera, Macrosiphum euphorbiae, and Diaphorina citri insects for the first time. The activity against the aphid M. euphorbiae was significant for the DCM extracts of plants from Valparaíso and Curicó (settling % = 23% ± 4% and 23% ± 5%, respectively). The antifeedant activities against the beetle E. paenulata and the lepidoptera P. adultera were significant for Valparaíso extracts, especially when tested against E. Paenulata (IFP = 1.0 ± 0.0). Finally, the MeOH and EtOH extracts from Valparaíso plants reduced the diet consumption of the psilid D. citri (p < 0.05). The results showed that P. maculosa is a good source of flavonoids with some antioxidant capacities and has potential interest as botanical eco-friendly alternative with deterrent activity.

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“…More recently, Freeman & Reveal (2005) and Burke et al (2010), recognized two subfamilies (Eriogonoideae and Polygonoideae) on the basis of other criteria. Several studies dealt with the macro-and micro-morphological characters of Polygonaceae (Simmonds, 1945;Haraldson, 1987;Ronse Decraene & Akeroyd, 1988;Hamed & Tantawy, 1990, 1991Leresten & Curtis, 1992;Brandbyge, 1993;Partridge, 2001;Li et al, 2003;Tantawy et al, 2005;Mosaferi & Keshavarzi, 2011;Hussein et al, 2012). The Polygonaceae are a europalynous family among dicotyledons (Wodehouse, 1931).…”

Section: Introductionmentioning

confidence: 99%

Pollen Morphology and Generic Delimitation of the Polygonaceae in Egypt

Shiha

2019

Egypt. J. Bot.

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Polygonoideae) in Egypt were investigated using light microscopy (LM) and scanning electron microscopy (SEM) to evaluate the taxonomic value of micro-morphological characters of pollen grains in order to differentiate between the genera and species. The study showed that pollen grains are radially symmetrical, isopolar, oblate-spheroidal, spheroidal, subprolate to prolate, with ambtrilobed or circular, tricolporoidate, tricolporate, rarely tetracolporate and pantopolyporate. Tectum is striato-reticulate to reticulate, coarse reticulate with double bacula in muri and pilatelumine, rugulo-reticulate, microechinate-foveolate, and microgranulateperforate Based on these characters, five groups of pollen types are recognized. The results indicate that pollen morphology characters of shape, aperture and exine ornamentation are useful in generic delimitation. A key for the separation of the different pollen types is provided.

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Phenolics of selected species of Persicaria and Polygonum (Polygonaceae) in Egypt

Cited by 25 publications

References 15 publications

Changes in phenolic profile, soluble sugar, proline, and antioxidant enzyme activities of Polygonumequisetiforme in response to salinity

Changes in phenolic profile, soluble sugar, proline, and antioxidant enzyme activities of Polygonumequisetiforme in response to salinity

Phenolic Fingerprinting, Antioxidant, and Deterrent Potentials of Persicaria maculosa Extracts

Pollen Morphology and Generic Delimitation of the Polygonaceae in Egypt

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