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Tytuł:
Phytochemical variability of coltsfoot (Tussilago farfara L.) in Poland
Zmienność fitochemiczna podbiału (Tussilago farfara L.) w Polsce
Autorzy:
Adamczak, A.
Buchwald, W.
Gryszczynska, A.
Powiązania:
https://bibliotekanauki.pl/articles/71231.pdf
Data publikacji:
2012
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
phytochemical variability
coltsfoot
Tussilago farfara
medicinal plant
mucilage
polyphenol
tannin
flavonoids
Polska
Opis:
Coltsfoot leaves are a traditional raw material, rich in polysaccharides and phenolics. The variability of the contents of these main compounds was determined, using plant material originated from 22 natural populations of Tussilago farfara L. growing in various regions of Poland. In the years 2008–2009, plants from each investigated population were collected in the Garden of Medicinal Plants in Plewiska near Poznań (Poland). Coltsfoot leaves were harvested in the middle of June and July of 2010, and then dried at room temperature. In these raw material we quantified swelling index (describing mucilage content) and spectrophotometrically: the amounts of total polyphenols, polyphenols unadsorbed on hide powder (non-tannin phenolics) and tannins (expressed as pyrogallol equivalent) as well as the sum of hydroxycinnamic acid derivatives (expressed as rosmarinic acid) and flavonoids (expressed as quercetin). The demonstrated results show the relatively high and balanced contents of the basic active compounds, especially flavonoids (0.7–1.3%) and polysaccharides (swelling index: 8.0–14.5). In addition, it was found that flavonoids and mucilage in coltsfoot leaves fluctuate in only a small range (V=11–13%), regardless of overshadow and the harvest time of raw material.
Liście podbiału stanowią tradycyjny surowiec zielarski, bogaty w polisacharydy i związki fenolowe. W niniejszych badaniach określono poziom zróżnicowania zawartości wspomnianych związków czynnych. Jako materiał roślinny wykorzystano 22 naturalne populacje Tussilago farfara L., pochodzące z różnych regionów Polski. W latach 2008–2009 pobrano rośliny z każdej badanej populacji i założono kolekcję pochodzeniową w Ogrodzie Roślin Leczniczych w Plewiskach koło Poznania. Liście podbiału do analiz fitochemicznych zbierano w połowie czerwca i lipca 2010 r., a następnie suszono w temperaturze pokojowej. W pozyskanym surowcu zielarskim oznaczono wskaźnik pęcznienia (określający zawartość śluzów) oraz spektrofotometrycznie: poziom polifenoli ogółem, polifenoli nie wiążących się z proszkiem skórzanym i garbników (w przeliczeniu na pirogalol), a także sumę pochodnych kwasu hydroksycynamonowego (w przeliczeniu na kwas rozmarynowy) i flawonoidów (w przeliczeniu na kwercetynę). Prezentowane wyniki badań wskazują na relatywnie wysoką i wyrównaną zawartość głównych związków czynnych, szczególnie flawonoidów (0,7–1,3%) i polisacharydów (wskaźnik pęcznienia: 8,0–14,5). Stwierdzono, iż poziom wspomnianych grup związków zmienia się w małym zakresie (V=11–13%) i nie zależy od ocienienia roślin i terminu zbioru surowca.
Źródło:
Herba Polonica; 2012, 58, 4
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of glycosylated flavonoids extracted from sweet-cherry stems, as antibacterial agents against pathogenic Escherichia coli isolates
Autorzy:
Aires, Alfredo
Dias, Carla
Carvalho, Rosa
Saavedra, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1038644.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
flavonoids
agro-food wastes
enhanced extraction
antimicrobial agents
pathogenic bacteria
Opis:
The aim of this study was to evaluate the bioactivity of flavonoids extracted from sweet-cherry stems which are often used by a traditional system of medicine to treat gastro-intestinal and urinary tract infections but lacking any consistent scientific evidence; moreover the information about the class of phenolics, their content and the potential bioactivity of such material is very scarce. Thus, in this context, we have set a research study in which we evaluated the profile and content of phenolics extracted from sweet-cherry stems through a conventional (70ºC and 20 min) and ultrasound assisted extraction (40 kHz, room temperature and 20 min). The extracts were phytochemically characterized by using an HPLC-DAD-UV/VIS system and assayed by an in vitro minimum inhibitory concentration (MIC) bioassay against Escherichia coli isolates. Simultaneously, the total antioxidant activities were measured using the 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonate (ABTS•+) radical cation assay. Our results indicate that sweet-cherry stems have a high content of sakuranetin, ferulic acid, p-coumaric acid, p-coumaroylquinic acid, chlorogenic acid and its isomer neochlorogenic acid. Their average levels were highly affected by the extraction method used (p<0.001). The same trend was observed for total antioxidant activity and MIC values. The extracts produced with ultrasounds presented both, a higher total antioxidant activity and a lower minimum inhibitory concentration. Statistical analyses of our results showed a significant correlation (p<0.01) of total antioxidant activity and minimum inhibitory concentration with phenolics present in the extracts studied. Thus, we can conclude that cherry stems can be further exploited to purify compounds and produce coproducts with enhanced biologically added value for pharmaceutical industry.
Źródło:
Acta Biochimica Polonica; 2017, 64, 2; 265-271
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cebula (Allium cepa L.) jako biologiczny środek ochrony roślin w szkółkach leśnych
Onion (Allium cepa L.) as a biological agent of plant protection in forest nurseries
Autorzy:
Aleksandrowicz-Trzcińska, M.
Hallmann, E.
Powiązania:
https://bibliotekanauki.pl/articles/991494.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
szkolki lesne
ochrona roslin
biologiczne metody ochrony roslin
biopreparaty
preparaty roslinne
wyciagi roslinne
cebula
Allium cepa
wyciag z cebuli
substancje biologicznie czynne
zwiazki siarki
saponiny
flawonoidy
kwercetyna
allium cepa
biofungicide
thiosulphinates
saponins
flavonoids
quercetin
Opis:
The paper discusses the biologically active compounds contained in onion (Allium cepa L.) such as thiosulfinates and other organosulfur compounds, saponins and flavonoids as well as evaluates their biological role. Method for biofungicides preparation, whose essential element is an aqueous extract of onion, and the possibility of its application in forest nurseries are presented. Content of polyphenols (quercetin and its derivatives) in a biopreparation responsible for its biological activity is determined as well.
Źródło:
Sylwan; 2013, 157, 07; 495-505
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical diversity of silverweed (Potentilla anserina L.) growing at the edges of arable fields.
Autorzy:
Angielczyk, Mirosław
Bączek, Katarzyna
Geszprych, Anna
Przybył, Jarosław L.
Węglarz, Zenon
Powiązania:
https://bibliotekanauki.pl/articles/2199570.pdf
Data publikacji:
2010-06-01
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
catechins
flavonoids
phenolic acids
populations
secondary metabolites
silverweed herb
tannins
Opis:
The medicinal usage of silverweed herb (Anserinae herba) is primarily related to the presence of phenolic compounds. Three populations of silverweed (Potentilla anserina L.) occurring at the edges of arable fields in Podlasie area (north-eastern Poland) were compared in respect of the content and composition of phenolics. Herb collected from the investigated populations differed in the content of determined compounds. The tannin content was very low (0.81-0.91%). The total flavonoid content ranged from 0.48 to 0.60%. Phenolic acid content was much higher (1.38-2.26%). Three flavan-3-ols: (+)-catechin, (-)-epicatechin, and (-)-epigallocatechin, four flavonol glycosides: rutoside, quercetin-3-O-glucoside, isorhamnetin-3-O-glucoside, and kaempferol-3-O-glucoside, as well as one phenolic acid (ellagic acid) were identified as a_result of HPLC analysis of methanolic extracts from the investigated raw materials. The most considerable differences between populations concerned the content of (+)-catechin (87.0-199.3 mg × 100 g-1), (-)-epigallocatechin (141.9-290.6 mg × 100 g-1), and rutoside (192.3-386.0 mg × 100 g-1) in herb...
Źródło:
Plant Breeding and Seed Science; 2010, 61; 41-46
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and antioxidant activity of flavonoids from Holarrhena floribunda (G.don) leaves
Autorzy:
Badmus, Jelili
Ekpo, Okobi
Rautenbach, Fanie
Marnewick, Jeanine
Hussein, Ahmed
Hiss, Donavon
Powiązania:
https://bibliotekanauki.pl/articles/1038826.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
polyphenolics
plants
Holarrhena floribunda
antioxidant
flavonoids
Opis:
Bioactive polyphenolics are ubiquitously present in plants and may play an important role in the prevention and management of certain human diseases. Three known flavonoids viz Kaemperol-3-O-rutinoside (1), quercetin-3-O-glucoside (2) and kaemperol-3-O-glucoside (3) and inseparable mixture (1:1) of quercetin-3-O-glucose/galactose (4) were isolated, and identified for the first time from Holarrhena floribunda. The antioxidant capacity using the ORAC, FRAP and TEAC assays and inhibition of lipid peroxidation were measured for isolated flavonoids. The result showed that compounds 2 and 4 showed significantly increased ORAC, TEAC, and FRAP activities with low pro-oxidant potential as well as improved lipid peroxidation inhibition levels when compared to compounds 1 and 3. The most active compounds were found to be flavonoids with a quercetin basic structure. These results imply that the isolated flavonoid glycosides are responsible for the antioxidant activity of the plant leaves and it forms the scientific basis for its traditional usage.
Źródło:
Acta Biochimica Polonica; 2016, 63, 2; 353-358
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Qualitative and quantitative evaluation of secondary metabolites of different plant extracts of Nothapodytes foetida (Wight) Sleumer an important endangered medicinal tree
Autorzy:
Bai, D. Sunitha
Suvarchala, V.
Pavani, Ch.
Chaithanya, G.
Spoorthi, V.
Shasthree, T.
Powiązania:
https://bibliotekanauki.pl/articles/1839343.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Camptothecin
phytochemicals
alkaloids
flavonoids
glycosides
tannins
phenols
triterpenoids
saponins
Nothapodytes foetida
Opis:
The present study of phytochemical screening has revealed valuable information about the chemical constituents of Nothapodytes foetida. Phytochemical analysis of leaves, stem, bark and root extracts of Nothapodytes foetida was performed using different solvent systems such as chloroform, butanol, hexane, methanol and acetonitrile for the presence of different phytochemicals with standard procedures. The phytochemical screening (both qualitative and quantitative) of variousplant extracts of Nothapodytes foetida revealed the presence of different phytoconstituents such as alkaloids, flavonoids, glycosides, tannins, phenols and triterpenoids. Among all the solvents tested, methanol, butanol and chloroform extract of leaf, stem, bark and root showed high concentration of all phytoconstituents compared to hexane and acetonitrile solvent extracts. The total quantity of secondary metabolites was evaluated by using the standard procedures and the line of regression and the regression coefficient estimated from the calibration curve of various standards. The highest quantity of phytoconstituent present in the plant extracts was identified to be alkaloids. The alkaloid content of leaf was evaluated to be 66.11±0.47, whereas stem possess 56.27±0.38, bark 59.02±0.17 and root 62.34±0.27 mg AE/gm of extracts and subsequent high amounts of phytoconstituents identified was flavonoids, tannins, phenols and saponins. Phytochemical screening of Nothapodytes foetidaused in the medical field for the design of new drugs.
Źródło:
World Scientific News; 2021, 162; 43-59
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Four-Week Intake of Blackthorn Flower Extract on Mice Tissue Antioxidant Status and Phenolic Content
Autorzy:
Balta, Vedran
Đikić, Domagoj
Crnić, Irena
Odeh, Dyna
Orsolic, Nada
Kmetič, Ivana
Murati, Teuta
Dragović Uzelac, Verica
Landeka Jurčević, Irena
Powiązania:
https://bibliotekanauki.pl/articles/1363304.pdf
Data publikacji:
2021
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
pharmacokinetic
flavan-3-ol
flavonoids
bioavailability
phenolic compounds
Prunus spinosa L
Opis:
The study examined the antioxidative physiological effects of phenolics from an ethanol-water extract of blackthorn flowers orally administrated to C57/BL6 mice for 28 days in daily doses of 25 mg of total phenolics/kg body weight. Contents of phenolics in the intestine, liver, and kidneys collected after 1, 7, 14, 21, and 28 days of extract administration were analyzed by UPLC-MS/MS method. In the same tissues, the antioxidative properties were determined as ferric reducing antioxidant power (FRAP), ABTS•+ scavenging activity, content of reduced glutathione (GSH), and activity of superoxide dismutase (SOD) and catalase (CAT). The lipid peroxidation in tissues was also evaluated by thiobarbituric acid reactive substances (TBARS) assay. The exposed mice (compared to the control ones) had a lower content of TBARS in all tissues mostly on the third/fourth week of daily consumption. SOD activity and GSH content increased on the 28th day in tissues. CAT activity was higher only in the liver after one week of consumption but remained unchanged in other organs throughout the experiment. Phenolic profiles were different in individual tissues. The most prominent increases compared to the control were determined for contents of 3-O-feruloylquinic acid, 4-O-p-coumaroylqiunic acid, kaempferol pentoside, and quercetin rhamnoside in the intestine; for ferulic acid and quercetin 3-O-rutinoside in the liver; and for quercetin 3-O-rutinoside, ferulic acid, and 4-O-p-coumaroylquinic acid in the kidneys. The screened phenolics with different distribution in tissues could be responsible for slight differences in the recorded antioxidative effects.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2020, 70, 4; 361-375
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro cultures of carnivorous plants from the Drosera and Dionaea genus for the production of biologically active secondary metabolites
Autorzy:
Banasiuk, R.
Kawiak, A.
Krolicka, A.
Powiązania:
https://bibliotekanauki.pl/articles/80172.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antimicrobial activity
antioxidant
cytotoxic activity
flavonoids
micropropagation
naphthoquinone
in vitro culture
carnivorous plant
Drosera
extract
phytotherapy
pulmonary disease
cough
biological activity
secondary metabolite
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2012, 93, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nasiona lnu - naturalne źródło zdrowia i urody
Linseed - a natural source of health and beauty
Autorzy:
Bartkowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/1216667.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
nasiona lnu
len
omega-3
flawonoidy
fitoestogeny
linseed
flax
flavonoids
fitoestogens
Opis:
Od zawsze polski len znany był w świecie. Lniane prześcieradła, pięknie, ręcznie haftowane obrusy i serwety miały duży popyt. Na takie rękodzieła zawsze byli amatorzy. Po II wojnie światowej istniały duże zakłady obróbki lnu. W ostatnim 20-leciu zakłady lniarskie sprzedano. Tymczasem len nadal powinien być naszym narodowym bogactwem. Pozyskiwanie drogocennych składników z lnu zwyczajnego sięga czasów Orientu. Coraz częściej i chętniej spożywamy i dodajemy do wielu produktów spożywczych różne formy nasion lnu, który nadal imponuje swoim korzystnym wpływem na organizm. Nasiona lnu, zwyczajowo zwane siemieniem lnianym, mają także wysoką wartość odżywczą. W swoim składzie zwierają duże ilości cennych składników.
Polish flax has always been known in the world. Linen bed sheets, tablecloths beautifully embroidered by hand enjoyed big demand. There have always been connoisseurs of such craftwork. After the Second World War there were large linen processing plants. In the last twenty years the flax plants were sold, although fax should still be our national wealth. Extraction of precious ingredients from common flax dates back to the Oriental times. More and more often and gladly we consume and add to many food products various forms of linseed, as the fax still impresses us with its beneficial impact on human body. The seeds of linum, commonly known as linseed, have also high nutritional value. They have in their composition big amounts of precious ingredients.
Źródło:
Chemik; 2013, 67, 3; 186-191
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application and properties of selected flavanones
Autorzy:
Błazińska, P.
Sykuła, A.
Powiązania:
https://bibliotekanauki.pl/articles/410506.pdf
Data publikacji:
2018
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
flavanones
flavonoids
secondary plant metabolites
biological activity
flawanony
flawonoidy
wtórne metabolity roślinne
aktywność biologiczna
Opis:
Flavanones, secondary plant metabolites, are one of the main group of flavanoids. They are widely spread in nature in many plants. The large diversity of structural structure of flavanones and controlled methods of modifying their molecules have a huge impact on biological activity. The present review will summarize the current knowledge about occurrence, obtaining by chemical synthesis, application and bioactivity of flavanones. Also, they are received from specific chemical synthesis. Flavanones have a great biological activity. Derivatives of flavanone have many different properties such as anti-inflammatory, anticancer, antioxidant, antimicrobial or hepatoprotective activities. These natural polyphenolic compounds are used in cosmetology, pharmacy and medicine. The demand and usage on them increases.
Źródło:
Biotechnology and Food Science; 2018, 82, 1; 61-74
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe poglądy na rolę bioflawonoidów
Novyjj vzgljad na rol bioflavonoidov
New concepts on the role of bioflavonoids
Autorzy:
Bogdanska, H.
Powiązania:
https://bibliotekanauki.pl/articles/874117.pdf
Data publikacji:
1963
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
flawonoidy
aktywnosc biologiczna
grupy karbonylowe
grupa hydroksylowa
scianki naczyn krwionosnych
witamina P
bioflawonoidy
flavonoids
biological activity
carbonyl group
hydroxyl group
blood vessel
vessel wall
vitamin P
bioflavonoids
Źródło:
Roczniki Państwowego Zakładu Higieny; 1963, 14, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of bioactive compounds content of kiwiberry during storage
Zmiany właściwości biochemicznych minikiwi podczas przechowywania
Autorzy:
Bogusz, R.
Rybak, K.
Gondek, E.
Powiązania:
https://bibliotekanauki.pl/articles/13925555.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
hardy kiwifruit
Actinidia arguta
storage
temperature
biochemical property
bioactive compound
flavonoids
antioxidant capacity
phenolics content
carotenoid
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2019, 598; 3-13
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of three sour cherry cultivars grown in Central-Eastern Poland
Autorzy:
Borowy, A.
Chrzanowska, E.
Kapłan, M.
Powiązania:
https://bibliotekanauki.pl/articles/11888483.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Central-Eastern Poland
plant cultivar
fruit tree
sour cherry
mahaleb cherry
Kelleris 16 cultivar
Lutowka cultivar
Nefris cultivar
plant cultivation
fruit crop
fruit quality
fruit size
flavonoids content
phenolic acid
anthocyanin
productivity index
DPPH method
dodine
thiacloprid
Opis:
Sour cherry is one of the most important fruit crops in Poland and cultivar is an important factor in its cultivation. The experiment was conducted in a commercial family orchard in a year characterized by a warm and wet spring and also by a very hot and dry summer. Fruit yields harvested from well fertilized 19-years old ‘Kelleris 16’, ‘Nefris’ and ‘Łutówka’ trees grafted on Mahaleb cherry and protected against pests using integrated plant protection system were medium high and of good quality, however productivity index of a tree was low. The fruits attained high weight and diameter and contained big amounts of sugars, vit. C, anthocyanins and flavonoids and medium amount of phenolic acids. Among anthocyanins the most important were cyanidin 3-glucosyl-rutinoside and cyanidin 3-rutinoside. Antioxidant activity of fruits measured as percent of DPPH inhibition was high and similar among compared cultivars. Łutówka was the most productive cultivar of medium leaf and fruit size and with fruits of highest vit. C and flavonoids content and lowest total sugars and monosaccharides content. The least productive cultivar was Nefris, though its fruits were the biggest and contained dry matter, soluble solids, anthocyanins and phenolic acids in the highest amounts of all and vit. C at the lowest level of all. Kelleris 16 was the medium productive cultivar characterized by widest leaf blades and smallest fruits. Content of total sugars and monosaccharides in its fruits was the highest and content of anthocyanins and phenolic acids was the lowest. Residues of dodine and thiacloprid determined in the fruits immediately after harvest were much lower than the permissible residue maximum level.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 1; 63-73
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induction of phytochelatins and flavonoids in cadmium polluted Berberis thunbergii
Autorzy:
Chadzinikolau, Tamara
Kozłowska, Monika
Mleczek, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/957022.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
heavy metals
barberry
phytochelatin synthase
phytochelatins
flavonoids
chloroplast pigments
Opis:
Cadmium tolerance has been widely studied in various plant species. The study was undertaken to assess the response of Berberis thunbergii, commonly growing under urban conditions, to increasing concentrations of cadmium (1, 4 and 16 mg of Cd kg–1 soil). Experiments were conducted from June to August in a greenhouse. Accumulation of cadmium ions in barberry leaves was observed, at a simultaneous occurrence of mechanisms reducing its harmful effects by an increased synthesis of phytochelatins (PCs). Generation of PCs – putative heavy metal chelators was related to the phytochelatin synthase activity (PCS) and the level of metal accumulation. Increased contents of anthocyanins and flavonols in cadmium polluted barberry, considering that it is a coloured-leaf plant seems important in aspect of their multifunctional role in plant-environment interactions. Besides the capacity to chelate heavy metals, flavonoids are antioxidants and efficiently scavenge free radicals. Moreover, the content of chloroplast pigments was determined, but the changes were non-significant.
Źródło:
Dendrobiology; 2017, 77; 139-146
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phenolics in the Tussilago farfara leaves
Związki fenolowe w liściu podbiału
Autorzy:
Chanaj-Kaczmarek, J.
Wojcinska, M.
Matlawska, I.
Powiązania:
https://bibliotekanauki.pl/articles/72556.pdf
Data publikacji:
2013
Wydawca:
Instytut Włókien Naturalnych i Roślin Zielarskich
Tematy:
phenolics
Tussilago farfara
leaf
flavonoids
medicinal plant
respiratory tract disease
traditional medicine
flower bud
chemical composition
Opis:
Coltsfoot leaves (Farfarae folium) are used in the European medicine in respiratory tract diseases, for cough, bronchitis and asthmatic disorders, while in the traditional Chinese medicine only flower buds (Farfarae flos) have been recognized as a medicine. A short literature review shows that most data concern the chemical composition of the coltsfoot flowers. During the carried out studies we have isolated and identified (UV, 1H and 13C NMR, analysis of acid and enzymatic hydrolyze products) six known flavonols from the coltsfoot leaves: kaempferol and its 3-O-β-glucopyranoside and 3-O-α-rhamnopyranosyl(1→6)- β-glucopyranoside, along with quercetin derivatives: 3-O-β-arabinopyranoside, 3-O-β- glucopyranoside and 3-O-α-rhamnopyranosyl(1→6)-β-glucopyranoside. Moreover, we have detected the presence of three phenolic acids.
Liście podbiału (Farfarae folium) są stosowane w medycynie europejskiej w chorobach dróg oddechowych, w kaszlu, w stanach zapalnych i skurczowych oskrzeli. W medycynie chińskiej są wykorzystywane jedynie kwiaty podbiału (Farfarae flos), dlatego większość danych literaturowych dotyczy składu chemicznego kwiatów. Z liści podbiału wyizolowaliśmy i zidentyfikowaliśmy (UV, 1H i 13C NMR, hydroliza kwasowa i enzymatyczna) 6 związków flawonoidowych: kemferol i jego glikozydy: 3-O-β-glukopiranozyd i 3-O-α-ramnopiranozylo(1→6)-β-glukopiranozyd, oraz glikozydy kwercetyny: 3-O-β- arabinopiranozyd, 3-O-β-glukopiranozyd i 3-O-α-ramnopiranozylo(1→6)-β-glukopiranozyd. Ponadto w surowcu stwierdzono obecność trzech kwasów fenolowych.
Źródło:
Herba Polonica; 2013, 59, 1
0018-0599
Pojawia się w:
Herba Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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