Variation in the Content of Bioactive Compounds in Infusions Prepared from Different Parts of Wild Polish Stinging Nettle (Urtica dioica L.)

Jeszka-Skowron, Magdalena; Zgoła‐Grześkowiak, Agnieszka; Frankowski, Robert; Grześkowiak, Tomasz; Jeszka, Anna Maria

doi:10.3390/molecules27134242

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…1 and 5 ( Table 2 ). The domination of rutoside in nettle leaves was observed earlier by Devkota et al [ 17 ], Pinelli et al [ 39 ] and Jeszka-Skowron et al [ 40 ]. According to Zekowić et al [ 41 ], among flavonoids, apigenin, luteolin, and naringenin and their derivatives are also present in this raw material.…”

Section: Resultssupporting

confidence: 58%

“…In turn, Pinelli et al [ 39 ] indicated lower amounts of these substances, i.e., 138.5 mg/100 g DW and 58.9 mg/100 g DW, respectively. So far, in nettle leaves, other phenolic acids have been detected, includingcaffeic, p –cumaric, cinnamic, ferulic, sinapic, syringic, quinic and protocatechuic acids [ 40 , 41 , 42 , 43 ]. It is worth noting that phenolic acids are considered to determine health-promoting values, since they reveal antioxidant, anti-inflammatory, antilipidemic, antidiabetic and antihypertensive activity [ 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

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Intraspecific Variability of Stinging Nettle (Urtica dioica L.)

et al. 2023

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The purpose of the work was to determine the intraspecific variability of the stinging nettle, in respect of the mass of leaves and their chemical composition, including the content of phenolic compounds and assimilative pigments. The objects of the study were 10 populations of nettle, originating from the eastern and southern part of Poland. The results obtained indicate a high level of variability between and within the populations investigated but not strictly related to their geographical locations. The mass of the leaves ranged from 0.19 to 0.28 kg dry weight (DW)/plant (Coefficient of variation (CV) = 16.33%). Using HPLC–DAD, four phenolic acids were detected, i.e., caffeoylmalic (570.97–1367.40 mg/100 g DW), chlorogenic (352.79–1070.83 mg/100 g DW), neochlorogenic (114.56–284.77 mg/100 g DW) and cichoric (58.31–189.52 mg/100 g DW) acids, with the last one differentiating populations to the highest degree (CV = 48.83%). All of the analyzed populations met the requirements of the European Pharmacopoeia (Ph Eur 10th) concerning the minimum content of caffeoylmalic and chlorogenic acids in nettle leaves (not less than 0.3%). Within the flavonoid fraction, two compounds were identified, namely rutoside (917.05–1937.43 mg/100 g DW, CV = 21.32%) and hyperoside (42.01–289.45 mg/100 g DW; CV = 55.26%). The level of chlorophyll a ranged from 3.82 to 4.49 mg/g DW, chlorophyll b from 1.59 to 2.19 mg/g DW, while the content of carotenoids varied from 2.34 to 2.60 mg/100 g DW. Given all the traits investigated, the level of a population’s polymorphism (CV) was visibly higher within a population than between populations. Population no. 4 was distinguished by the highest mass of leaves, and the highest content of rutoside, while population no. 2 was distinguished by the highest content of hyperoside, caffeoylmalic and chlorogenic acid.

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Intraspecific Variability of Stinging Nettle (Urtica dioica L.)

et al. 2023

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“…The total flavonoid content in water, 70% ethanol, and 96% methanol was not significantly different. According to Vajic et al [ 20 ], predominant phenol in nettle leaves was rutin, but Jeszka-Skowron et al [ 32 ] research results showed that the lowest content of 3-caffeoylquinic acid or rutin was determined in nettle roots comparing with aerial parts of the plant. In general, the preference of the phenols for methanol and ethanol may be caused by their non-polar part and the aliphatic fragment of alcohols.…”

Section: Resultsmentioning

confidence: 99%

Wild Stinging Nettle (Urtica dioica L.) Leaves and Roots Chemical Composition and Phenols Extraction

Tarasevičienė

Vitkauskaitė

Paulauskienė

et al. 2023

Plants

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Stinging nettle (Urtica dioica L.) is an herbaceous plant that grows all over the world and is widely used as an edible and medicinal plant. Overall research results reveal that the chemical content and antioxidant activity of aerial parts and roots of stinging nettle depends on the growing region, soil, meteorological conditions (especially sunshine), collecting time, etc. The chemical composition of stinging nettle growing in Lithuania and the solid–liquid extraction efficiency of leaves and roots using different solvents were analysed. Additionally, we determined leaves phenols extraction efficiency using 96% methanol at different extraction conditions. Research results showed that a higher amount of crude fats, non-nitrogen extractives, and total carotenoids were in leaves, but the amount of crude proteins and ash did not differ significantly compared with roots. A higher amount of polyunsaturated fatty acids (PUFAs) and monounsaturated fatty acids (MUFAs) were detected in roots instead of leaves while saturated fatty acids (SFAs) were in leaves. The extraction results showed that the most effective solvent for total phenols and flavonoids in leaves was 96% methanol, for total phenols in roots was 50% methanol and 50% ethanol for total flavonoids in roots. The most effective temperature for the Urtica dioica L. leaves phenols extraction was 70 °C, while time does not have a significant influence. The present study’s findings suggested that concentrated and binary solvents had different effects on the phenol’s extraction efficiency from different stinging nettle parts and extraction temperature performed a key role instead of extraction time.

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“…Therefore, based on Analytical Methods Paper eliminating the matrix effect, we chose a convenient and quick pretreatment method to remove the matrix of herbal tea samples. 27 First, the sample of herbal tea was centrifuged at 10 000 rpm for 10 min. Then, the collected liquid was ltered through a 0.22 mm water ltration membrane.…”

Section: Matrix Effectmentioning

confidence: 99%