| investigation of the antimicrobial activity of rhaponticum (rhaponticum carthamoides d.c. iljin) and shrubby cinquefoil (potentilla fruticosa l.). | the aim of the study was to determine antimicrobial activity of rhaponticum and shrubby cinquefoil extracts. material and methods. ethanol extract from the leaves of rhaponticum (rhaponticum carthamoides d.c. iljin) and shrubby cinquefoil (potentilla fruticosa l.) was produced at the department of food technology, kaunas university of technology. the antimicrobial activity of the viscous extract or rhaponticum and shrubby cinquefoil was evaluated using standard microorganism cultures (bacteria s ... | 2011 | 21822040 |
| synergistic effects and related bioactive mechanism of potentilla fruticosa l. leaves combined with ginkgo biloba extracts studied with microbial test system (mts). | potentilla fruticosa, also called "jinlaomei" and "gesanghua", is widely used as folk herbs in traditional tibetan medicine in china to treat inflammations, wounds, certain forms of cancer, diarrhoea, diabetes and other ailments. previous research found p. fruticosa leaf extract (c-3) combined with ginkgo biloba extracts (egb) showed obvious synergistic effects in a variety of oxidation systems. the aim of the present study was to further confirm the synergy of p. fruticosa combined with egb vie ... | 2016 | 27905920 |
| phenolic profiles and antioxidant capacities of crude extracts and subsequent fractions from potentilla fruticosa l. leaves. | this work aimed to further investigate the phenolic profiles and antioxidant capacities of the crude extracts and the subsequent fractions of potentilla fruticosa leaves. result showed that p. fruticosa leaves contained high amounts for hyperoside, ellagic acid and (+)-catechin contents, and the highest amount being registered for hyperoside (17.67 mg g(-1)). nine sub-fractions were obtained after column chromatographic separation. ef-3, ef-4, ef-5 and bf-2 presented higher values for their tota ... | 2016 | 26371751 |
| [drought resistibility of main tree species in water conservation forest of qilian moutains]. | with p-v techniques, this paper determined and analyzed the water parameters of main tree species in the water conservation forest of qilian moutains. the results showed that the test water parameters varied with tree species, reflecting the complicacy of the drought-resistance mechanism of trees. among 10 parameters, /phi pi100 - phi pi0/, rcv, rowc0 epsilon(max) could reflect most information of drought resistibility. based on their drought resistibility, the test tree species could be classif ... | 2005 | 16515165 |
| [numerical analysis on ecological gradient of plant communities in donggou catchment, hebei province, china]. | based on dcca-oac, the plant communities in donggou catchment, bashang region, hebei province, were classified into 8 types of community. the environmental gradient, structural gradient and human-disturbance could be well expressed in the ordination plot. axis 1 reflected the spatial pattern of plant communities along the gradient of altitude and slope, while axis 2 showed the plant community distribution on different aspects. the plant communities showed a distribution gradient along moisture g ... | 2004 | 15320397 |
| assessing facilitative responses to a nurse shrub at the community level: the example of potentilla fruticosa in a sub-alpine grassland of northwest china. | biotic interaction studies have revealed a large discrepancy among experiments in target responses to the effects of neighbours, which may in part be due to both high species-specificity of plant responses and low number of target species used in experiments. our aim was to assess facilitative responses at the community level and the role of both functional groups and ecological attributes of target species. in a sub-alpine grassland on the eastern tibet plateau, we assessed growth responses of ... | 2010 | 20701701 |
| [the antiradical activity of plant extracts and healthful preventive combinations of these exrtacts with the phospholipid complex]. | using the chemiluminescence method, the effective concentration of antioxidants (ao) and its reactivity toward peroxyl radicals (ara, the k7 constant) have been measured for 13 plant extracts. in fact all extracts demonstrated ara higher than ionol. larix dahurica, hypericum perforatum, potentilla fruticosa, aronia melanocarpa and rhaponticum carthamoides extracts showed the highest values of ara. the combinations aronia + raponticum extracts; larix + hibiscus extracts; schizandra +aronia extrac ... | 2014 | 23350203 |
| influence of environmental factors on the active substance production and antioxidant activity in potentilla fruticosa l. and its quality assessment. | environmental factors may influence types and contents of active substances. this study investigated the influence of environmental factors on the active substance contents and antioxidant activity of potentilla fruticosa l. from different regions of china. also, hplc fingerprint similarity analysis (sa) coupled with hierarchical cluster analysis (hca) and discriminant analysis (da) were further introduced for the accurate classification and quality assessment of p. fruticosa. the results showed ... | 2016 | 27373366 |
| phenolic compounds and antioxidant activity of different organs of potentilla fruticosa l. from two main production areas of china. | this report compared the phenolic compounds and antioxidant activity of the leaves, flowers, and stems of potentilla fruticosa l. collected from two main production areas of p. r. china (taibai mountains and the qinghai huzhu northern mountains). the results indicated that there were significant differences in the phenol contents and antioxidant activities among the different organs and between the two productions. high-performance liquid-chromatography analysis indicated that hyperoside, (+)-ca ... | 2016 | 27450426 |
| invasion of a dominant floral resource: effects on the floral community and pollination of native plants. | through competition for pollinators, invasive plants may suppress native flora. community-level studies provide an integrative assessment of invasion impacts and insights into factors that influence the vulnerability of different native species. we investigated effects of the nonnative herb lythrum salicaria on pollination of native species in 14 fens of the eastern united states. we compared visitors per flower for 122 native plant species in invaded and uninvaded fens and incorporated a landsc ... | 2017 | 28052387 |
| shrubby cinquefoil (dasiphora fruticosa (l.) rydb.) mapping in northwestern estonia based upon site similarities. | different methods have been used to map species and habitat distributions. in this paper, similarity-based reasoning-a methodological approach that has received less attention-was applied to estimate the distribution and coverage of dasiphora fruticosa for the region in the baltic states where grows the most abundant population of this species. | 2017 | 28222712 |
| [characteristics of stemflow for typical alpine shrubs in qilian mountain]. | taking the typical alpine shrubs potentilla fruticosa, salix cupularis, hippophae rhamnoides, and caragana jubata in qilian mountain as test objects, a field investigation from june 1 to october 31, 2010 was conducted on the variation characteristics of the shrub stemflow, and analyzed the affecting effects of rainfall intensity and canopy structure morphology. the stemflow generated when the rainfall in early period was 2.1 mm, with an average of 3.4%, 3.2%, 8.0%, and 4.2% of the gross rainfall ... | 2011 | 22097356 |
| investigation of free amino acid, total phenolics, antioxidant activity and purine alkaloids to assess the health properties of non-camellia tea. | to find novel functional beverages from folk teas, 33 species of frequently used non-camellia tea (plants other than camellia) were collected and compared with camellia tea (green tea, pu-erh tea and black tea) for the first time. data are reported here on the quantities of 20 free amino acids (faas) and three purine alkaloids (measured by uhplc), total polyphenols (measured by folin-ciocalteu assay), and antioxidant activity (dpph). the total amounts of faas in non-camellia tea (0.62-18.99 mg/g ... | 2016 | 27006902 |
| [study on the plant community of fritillaria cirrhosa]. | to provide scientific basis for natural cultivation of fritillaria cirrhosa. | 2003 | 15139120 |
| [chemical properties and enzyme activities of rhizosphere and non-rhizosphere soils under six chinese herbal medicines on mt. taibai of qinling mountains, northwest china]. | this paper studied the chemical properties and enzyme activities of rhizosphere and non-rhizosphere soils in different habitats of six chinese herbal medicines, including pyrola decorata, cephalotaxus fortunei, polygonatum odoratum, potentilla glabra, polygonum viviparum, and potentilla fruticosa, on the mt. taibai of qinling mountains. in the rhizosphere soils of the herbs, the contents of soil organic matter, total nitrogen, available nitrogen, and available phosphorus and the soil cation exch ... | 2012 | 23359927 |
| phytochemical profiles, antioxidant and antimicrobial activities of three potentilla species. | extracts from potentilla species have been applied in traditional medicine and exhibit antioxidant, hypoglycemic, anti-inflammatory, antitumor and anti-ulcerogenic properties, but little has been known about the diversity of phytochemistry and pharmacology on this genus. this study investigated and compared the phytochemical profiles, antioxidant and antimicrobial activities of leaf extracts from three potentilla species (potentilla fruticosa, potentilla glabra and potentilla parvifolia) in orde ... | 2013 | 24252124 |
| Method development and validation for optimized separation of quercetin derivatives in selected Potentilla species using high-performance thin-layer chromatography photodensitometry method. | A novel HPTLC-densitometry method was developed for separation and quantitative determination of four flavonoids: quercetin 3-O-ß-d-glucuropyranoside (miquelianin; QG), quercetin 3-O-ß-d-glucopyranoside (isoquercitrin; IQ), quercetin 3-O-ß-d-galactopyranoside (hyperoside; HYP) and quercetin 3-O-ß-d-(6?-a-l-rhamnosylo)-glucopyranoside (rutin; RUT) in ethyl acetate fractions from aerial parts of selected Potentilla species: P. argentea, P. erecta, Dasiphora fruticosa (syn. P. fruticosa), Drymocall ... | 2011 | 22209482 |
| [values of carbon dioxide emission from different land-use patterns of alpine meadow]. | the value order of carbon dioxide emission from different land-use of alpine meadow was significantly with season changing. it was found that the potentilla fruticosa shrub meadow(c, 1871.40 g/m2) > kobresia humilis meadow(a, 1769.63 g/m2) > degraded potentilla fruticosa shrub meadow(d, 1495.60 g/m2) > degraded kobresia humilis meadow(b, 1191.26 g/m2) during growth season, a(661.46 g/m2) > c(550.90 g/m2) > b(502.50 g/m2) > d (384.50 g/m2) in rest period; and a(2431.09 g/m2) > c(2422.30 g/m2) > d ... | 2001 | 11855172 |
| attractiveness of michigan native plants to arthropod natural enemies and herbivores. | the use of plants to provide nectar and pollen resources to natural enemies through habitat management is a growing focus of conservation biological control. current guidelines frequently recommend use of annual plants exotic to the management area, but native perennial plants are likely to provide similar resources and may have several advantages over exotics. we compared a set of 43 native michigan perennial plants and 5 frequently recommended exotic annual plants for their attractiveness to n ... | 2007 | 17716466 |
| evaluation of antioxidative properties of geranium macrorrhizum and potentilla fruticosa extracts in dutch style fermented sausages. | antioxidative properties of geranium macrorrhizum, potentilla fruticosa and rosmarinus officinalis (as a reference) extracts were evaluated in dutch style fermented sausages. extracts were incorporated into sausages during preparation. the sausages were subsequently fermented, tested and compared to a standard spices mix, traditionally used for the production of such sausages. formation of the primary oxidation products - peroxides, and secondary - tbars and hexanal was monitored. the polar extr ... | 2007 | 22061961 |
| growing season ecosystem respirations and associated component fluxes in two alpine meadows on the tibetan plateau. | from 30 june to 24 september in 2003 ecosystem respiration (re) in two alpine meadows on the tibetan plateau were measured using static chamber- and gas chromatography- (gc) based techniques. simultaneously, plant removal treatments were set to partition re into plant autotrophic respiration (ra) and microbial heterotrophic respiration (rh). results indicated that re had clear diurnal and seasonal variation patterns in both of the meadows. the seasonal variability of re at both meadow sites was ... | 2008 | 18713359 |
| methane emissions by alpine plant communities in the qinghai-tibet plateau. | for the first time to our knowledge, we report here methane emissions by plant communities in alpine ecosystems in the qinghai-tibet plateau. this has been achieved through long-term field observations from june 2003 to july 2006 using a closed chamber technique. strong methane emission at the rate of 26.2+/-1.2 and 7.8+/-1.1microg ch4 m-2h-1 was observed for a grass community in a kobresia humilis meadow and a potentilla fruticosa meadow, respectively. a shrub community in the potentilla meadow ... | 2008 | 18755657 |
| range shifts of potentilla fruticosa on the qinghai-tibetan plateau during glacial and interglacial periods revealed by chloroplast dna sequence variation. | the qinghai-tibetan plateau is one of the most extensive habitats for alpine plants in the world. therefore, the patterns of genetic variation in populations on the plateau can reveal the detailed demographic history of alpine plants. we analysed the geographical structure of chloroplast matk sequence variation in potentilla fruticosa l. (rosaceae), a shrub currently found across the entire plateau. we obtained sequence data from 508 individuals from 23 populations at sites ranging from the high ... | 2010 | 19920855 |
| the influence of aqueous extracts of selected potentilla species on normal human colon cells. | potentilla l. (rosaceae) species have been used in traditional medicine in asia, europe and northern america. this study analyzed the biological activity of aqueous extracts of potentilla species (rosaceae): dasiphora fruticosa (syn. p. fruticosa), p. norvegica, p. pensylvanica, p. thuringiaca, p. crantzii and p. nepalensis. the activities were tested using mtt, nr and dpph assays on normal human colon epithelium (ccd 841 cotr) and colon myofibroblast (ccd-18co) cells. moreover, cell morphology ... | 2013 | 23757943 |
| a phylogenetic analysis of the genus fragaria (strawberry) using intron-containing sequence from the adh-1 gene. | the genus fragaria encompasses species at ploidy levels ranging from diploid to decaploid. the cultivated strawberry, fragaria×ananassa, and its two immediate progenitors, f. chiloensis and f. virginiana, are octoploids. to elucidate the ancestries of these octoploid species, we performed a phylogenetic analysis using intron-containing sequences of the nuclear adh-1 gene from 39 germplasm accessions representing nineteen fragaria species and one outgroup species, dasiphora fruticosa. all trees f ... | 2014 | 25078607 |
| [effect of degradation succession process on the temperature sensitivity of ecosystem respiration in alpine potentilla fruticosa scrub meadow]. | grazing is one of the main artificial driving forces for the degradation succession process of alpine meadow. in order to quantitatively study the temperature sensitivity of alpine meadow ecosystem respiration in different degradation stages, we conducted the research in haibei alpine meadow ecosystem research station, cas from july 2003 to july 2004. the static chamber-chromatography methodology was used to observe the seasonal changes of alpine scrub ecosystem respiration flux during different ... | 2015 | 25929079 |
| quality evaluation of potentilla fruticosa l. by high performance liquid chromatography fingerprinting associated with chemometric methods. | the present study was performed to assess the quality of potentilla fruticosa l. sampled from distinct regions of china using high performance liquid chromatography (hplc) fingerprinting coupled with a suite of chemometric methods. for this quantitative analysis, the main active phytochemical compositions and the antioxidant activity in p. fruticosa were also investigated. considering the high percentages and antioxidant activities of phytochemicals, p. fruticosa samples from kangding, sichuan w ... | 2016 | 26890416 |
| synergistic effects of potentilla fruticosa l. leaves combined with green tea polyphenols in a variety of oxidation systems. | potentilla fruticosa l. leaves are widely used as tea in china, with many commercial "jinlaomei" teas available in markets. it has been confirmed to possess significant antioxidant activity than that of butylated hydroxytoluene. in this study, the synergistic effects of p. fruticosa leaves extracts (pfe) combined with green tea polyphenols (gtp) were studied to elucidate their use in combination and find specific combinations with least concentrations that enhance the antioxidant activity. isobo ... | 2016 | 27061936 |