| in vitro antispasmodic and anti-inflammatory effects of drosera rotundifolia. | in investigations of the anti-inflammatory and spasmolytic effects of drosera rotundifolia two extracts were tested in different in vitro assays. an aqueous and an ethanolic extract inhibited human neutrophil elastase, achieving ic50 values of 5 and 1 microg/ml, respectively. the very low naphthoquinone concentrations in the extracts seem not to be responsible for the effect, as the pure compounds were not effective in the test system used. thus, flavonoids like hyperoside, quercetin and isoquer ... | 2004 | 15344845 |
| structural and functional characterisation of a class i endochitinase of the carnivorous sundew (drosera rotundifolia l.). | chitinase gene from the carnivorous plant, drosera rotundifolia , was cloned and functionally characterised. plant chitinases are believed to play an important role in the developmental and physiological processes and in responses to biotic and abiotic stress. in addition, there is growing evidence that carnivorous plants can use them to digest insect prey. in this study, a full-length genomic clone consisting of the 1665-bp chitinase gene (gdrchit) and adjacent promoter region of the 698 bp in ... | 2017 | 27761648 |
| bioactive compounds from northern plants. | northern conditions are characterised by long days with much light and low temperatures during the growing season. it has been chimed that herbs and berries grown in the north are stronger tasting compared to those of southern origin. the compounds imparting aroma and color to berries and herbs are secondary metabolites which in plants mostly act as chemical means of defense. recently, the production of secondary metabolites using plant cells has been the subject of expanding research. light int ... | 2010 | 21520706 |
| fungal root endophytes of the carnivorous plant drosera rotundifolia. | as carnivorous plants acquire substantial amounts of nutrients from the digestion of their prey, mycorrhizal associations are considered to be redundant; however, fungal root endophytes have rarely been examined. as endophytic fungi can have profound impacts on plant communities, we aim to determine the extent of fungal root colonisation of the carnivorous plant drosera rotundifolia at two points in the growing season (spring and summer). we have used a culture-dependent method to isolate fungal ... | 2010 | 20012108 |
| drosera rotundifolia and drosera tokaiensis suppress the activation of hmc-1 human mast cells. | several northern hemisphere drosera species have been used in the therapy of respiratory tract infections as the traditional medicine droserae herba. | 2009 | 19540325 |
| segregation of habitat and prey in two sympatric carnivorous plant species, drosera rotundifolia and drosera intermedia. | in 1984 a quantitative field study was made on two sympatric species of sundew, drosera rotundifolia and drosera intermedia, growing in a small silting-up bog in southern germany. both species differ in individual size and abundance but have nearly the same total biomass. their association along a transect was strongly negative and also the vertical distribution was quite different. d. rotundifolia grows in significantly higher parts of the bog than d. intermedia. the composition of arthropod pr ... | 1986 | 28311507 |
| [an active principle from drosera rotundifolia and its pharmacology]. | | 1955 | 13262697 |
| the significance of opportunistic predators for the sympatric carnivorous plant species drosera intermedia and drosera rotundifolia. | earlier feeding experiments with drosera in the field using adult drosophila melanogaster as prey had shown that d. intermedia reacts three times as strong with respect to biomass production as the sympatric species d. rotundifolia. the present study shows that in d. rotundifolia only 29% of added flies remain on the leaves for more than 24 h, but 95% in d. intermedia. opportunistic predators, mostly ants, are likely to be responsible for this difference. ants were often observed robbing food fr ... | 1989 | 28311195 |
| the significance of carnivory for the fitness of drosera in its natural habitat : 2. the amount of captured prey and its effect on drosera intermedia and drosera rotundifolia. | a field study of two carnivorous plant species, drosera intermedia and d. rotundifolia, was carried out in a small silting-up bog in southern bavaria (fr germany). various parameters of undisturbed individuals of both species were measured for a period of two years and subjected to a partial correlation analysis. the importance of prey as a limiting factor for various fitness parameters was confirmed for both species. other factors may occasionally also be limiting, e.g. assimilation area and wa ... | 1989 | 28311196 |
| insect capture and growth of the insectivorous drosera rotundifolia l. | rates of insect capture increased with leaf area in the insectivorous plant drosera rotundifolia, and growth of new leaves was related to insect capture. however, increased leaf growth was counterbalanced by leaf abscission which was in turn related to insect capture and leaf growth. leaf loss equaled leaf growth in plants having natural rate of insect capture. a large proportion of the nitrogen gain from prey was stored in the hypocotyl; it was estimated from feeding experiments that about 24% ... | 1990 | 28312722 |
| the effect of soil nutrient status on prey utilization in four carnivorous plants. | the hypothesis that carnivorous plants are less responsive to prey at high soil nutrient levels than at lower levels (givnish et al. 1984) is tested on four plant species (drosera rotundifolia, pinguicula alpina, p. villosa and p. vulgaris) from a subarctic environment. the response, measured in terms of seven characteristics (winter bud weight, winter bud nitrogen and phosphorus content, flowering frequency, total seed weight, seed number and weight per seed), was analysed. although all species ... | 1991 | 28313150 |
| nitrogen uptake from prey and substrate as affected by prey capture level and plant reproductive status in four carnivorous plant species. | uptake of nitrogen from prey and substrate and partitioning of prey-derived nitrogen were studied in the carnivorous plant species pinguicula alpina, p. villosa, p. vulgaris and drosera rotundifolia in a subarctic environment. efficiency in nitrogen uptake from prey was evaluated by tracing (15)n from (15)n-enriched drosophila flies fed to the plants. the in situ uptake efficiency differed somewhat between species and ranged from 29 to 41% of prey n. this efficiency was not affected by different ... | 1996 | 28307324 |
| regional and habitat differences in 7-methyljuglone content of finnish drosera rotundifolia. | the concentration of 7-methyljuglone was studied in the round-leaved sundew drosera rotundifolia l. collected from different regions in northern finland. samples for analysis were collected from peat bogs and sandpit habitats. the mean concentration of 7-methyljuglone varied from 1.0 to 2.3% of dry weight. variation between years in the amount of 7-methyljuglone was significant in plants growing on sand, and in the northernmost region studied. overall, the variation in the production of 7-methyl ... | 2003 | 12737980 |
| possible input of nitrogen of visitors' origin on a protected peatland. | the ozegahara peatland, in the nikko-oze national park in japan, is ecologically significant because of its oligotrophic environment; it is one of the most strictly preserved areas in the country. the isotope ratio of nitrogen (15n/14n) and carbon (13c/12c) and c/n ratio of peat moss (sphagnum spp.) and sundew (drosera rotundifolia) in the peatland were analyzed. the correlation of the isotope ratio with some parameters (sundew population density, number of trapped insects, water level, bog myrt ... | 2005 | 15902450 |
| comparison of the antiinflammatory effects of drosera rotundifolia and drosera madagascariensis in the het-cam assay. | the antiinflammatory effects of ethanol and aqueous extracts from drosera rotundifolia and from drosera madagascariensis were compared in vivo in the het-cam assay. both extracts from d. rotundifolia and the ethanol extract from d. madagascariensis showed remarkable efficacy at doses of 500 microg/pellet. the inhibition of the inflammation by the extracts was stronger than that by 50 microg hydrocortisone/pellet. in contrast, there was only a very weak effect observed at a dose of 500 microg/pel ... | 2005 | 16041727 |
| tentacles of in vitro-grown round-leaf sundew (drosera rotundifolia l.) show induction of chitinase activity upon mimicking the presence of prey. | induction of plant-derived chitinases in the leaves of a carnivorous plant was demonstrated using aseptically grown round-leaf sundew (drosera rotundifolia l.). the presence of insect prey was mimicked by placing the chemical inducers gelatine, salicylic acid and crustacean chitin on leaves. in addition, mechanical stirring of tentacles was performed. chitinase activity was markedly increased in leaf exudates upon application of notably chitin. application of gelatine increased the proteolytic a ... | 2005 | 16049675 |
| using of liquid chromatography coupled with diode array detector for determination of naphthoquinones in plants and for investigation of influence of ph of cultivation medium on content of plumbagin in dionaea muscipula. | the interest of many investigators in naphthoquinones is due to their broad-range of biological actions from phytotoxic to fungicidal. the main aim of this work was to investigate the influence of different ph values of cultivation medium on naphthoquinone content in dionaea muscipula. for this purpose, we optimized the simultaneous analysis of the most commonly occurring naphthoquinones (1,4-naphthoquinone, lawsone, juglone and plumbagin) by high performance liquid chromatography coupled with d ... | 2006 | 16765109 |
| detection of chitinolytic enzymes with different substrate specificity in tissues of intact sundew (drosera rotundifolia l.): chitinases in sundew tissues. | the round-leaf sundew (drosera rotundifolia l.) is a carnivorous plant expressing a wide range of chitinolytic enzymes playing role in many different processes. in this study the intact plants were analyzed for the presence of chitinase transcripts and chitinolytic activities in different organs. in situ hybridization with chitnase fragment as a probe has revealed the presence of chitinases in the mesophyll cells of leaves and vascular elements of stems of healthy, non-stressed plants. more pron ... | 2009 | 18437530 |
| the curious case of charles darwin and homeopathy. | in 1849, charles darwin was so ill that he was unable to work one out of every 3 days, and after having various troubling symptoms for 2-12 years, he wrote to a friend that he was 'going the way of all flesh'. he sought treatment from dr james manby gully, a medical doctor who used water cure and homeopathic medicines. despite being highly skeptical of these treatments, he experienced a dramatic improvement in his health, though some of his digestive and skin symptoms returned various times in h ... | 2010 | 19875430 |
| a rapid and efficient method for isolating high quality dna from leaves of carnivorous plants from the drosera genus. | drosera rotundifolia, drosera capensis, and drosera regia are carnivorous plants of the sundew family, characterized by the presence of stalked and sticky glands on the upper leaf surface, to attract, trap, and digest insects. these plants contain exceptionally high amounts of polysaccharides, polyphenols, and other secondary metabolites that interfere with dna isolation and subsequent enzymatic reactions such as pcr amplification. we present here a protocol for quick isolation of drosera dna wi ... | 2012 | 22002226 |
| reliance on prey-derived nitrogen by the carnivorous plant drosera rotundifolia decreases with increasing nitrogen deposition. | • carnivory in plants is presumed to be an adaptation to a low-nutrient environment. nitrogen (n) from carnivory is expected to become a less important component of the n budget as root n availability increases. • here, we investigated the uptake of n via roots versus prey of the carnivorous plant drosera rotundifolia growing in ombrotrophic bogs along a latitudinal n deposition gradient through sweden, using a natural abundance stable isotope mass balance technique. • drosera rotundifolia plant ... | 2012 | 22506640 |
| glucan-rich diet is digested and taken up by the carnivorous sundew (drosera rotundifolia l.): implication for a novel role of plant β-1,3-glucanases. | carnivory in plants evolved as an adaptation strategy to nutrient-poor environments. thanks to specialized traps, carnivorous plants can gain nutrients from various heterotrophic sources such as small insects. digestion in traps requires a coordinated action of several hydrolytic enzymes that break down complex substances into simple absorbable nutrients. among these, several pathogenesis-related proteins including β-1,3-glucanases have previously been identified in digestive fluid of some carni ... | 2013 | 23832529 |
| population history of the two carnivorous plants drosera peltata var. nipponica and drosera rotundifolia (droseraceae) in korea. | drosera peltata var. nipponica, an element of the east asia warm-temperate vegetation, and d. rotundifolia, a widely distributed boreal species, reach one of their northernmost and southernmost limits, respectively, on the korean peninsula. because the last glacial maximum (lgm)-holocene dynamics of warm-temperate and boreal paleovegetation differed considerably on the peninsula, the population history of these two sundews is expected to be different, leaving differential imprints in their genet ... | 2013 | 24186960 |
| red trap colour of the carnivorous plant drosera rotundifolia does not serve a prey attraction or camouflage function. | the traps of many carnivorous plants are red in colour. this has been widely hypothesized to serve a prey attraction function; colour has also been hypothesized to function as camouflage, preventing prey avoidance. we tested these two hypotheses in situ for the carnivorous plant drosera rotundifolia. we conducted three separate studies: (i) prey attraction to artificial traps to isolate the influence of colour; (ii) prey attraction to artificial traps on artificial backgrounds to control the deg ... | 2014 | 24740904 |
| nitrogen deposition and prey nitrogen uptake control the nutrition of the carnivorous plant drosera rotundifolia. | nitrogen (n) deposition has important negative impacts on natural and semi-natural ecosystems, impacting on biotic interactions across trophic levels. low-nutrient systems are particularly sensitive to changes in n inputs and are therefore more vulnerable to n deposition. carnivorous plants are often part of these ecosystems partly because of the additional nutrients obtained from prey. we studied the impact of n deposition on the nutrition of the carnivorous plant drosera rotundifolia growing o ... | 2015 | 25655989 |
| subpicosecond surface dynamics in genomic dna from in vitro-grown plant species: a sers assessment. | in this work the surface-enhanced raman total half band widths of seven genomic dnas from leaves of chrysanthemum (dendranthema grandiflora ramat.), common sundew (drosera rotundifolia l.), edelweiss (leontopodium alpinum cass), epilobium hirsutum l., hypericum richeri ssp. transsilvanicum (čelak) ciocârlan, rose (rosa x hybrida l.) and redwood (sequoia sempervirens d. don. endl.) have been measured. we have shown that surface-enhanced raman spectroscopy (sers) can be used to study the fast subp ... | 2015 | 25687823 |
| molecular characterization and evolution of carnivorous sundew (drosera rotundifolia l.) class v β-1,3-glucanase. | a gene for β-1,3-glucanase was isolated from carnivorous sundew. it is active in leaves and roots, but not in digestive glands. analyses in transgenic tobacco suggest its function in germination. ancestral plant β-1,3-glucanases (ec 3.2.1.39) played a role in cell division and cell wall remodelling, but divergent evolution has extended their roles in plant defense against stresses to decomposition of prey in carnivorous plants. as available gene sequences from carnivorous plants are rare, we iso ... | 2017 | 27580619 |
| [rossoliside, a glycoside from drosera rotundifolia l]. | | 1970 | 5438907 |
| [the presence of hydroplumbagin glucoside in drosera rotundifolia l]. | | 1969 | 5774641 |
| [flavonoids from drosera rotundifolia l]. | | 1966 | 5224884 |
| [an active substance isolated from drosera rotundifolia]. | | 1956 | 13341653 |