| screening seeds of scottish plants for antibacterial activity. | based on ethnopharmacological and taxonomic information, seeds of 21 scottish plant species from 14 different families were obtained from authentic seed suppliers. their n-hexane, dichloromethane and methanol extracts were assessed for antibacterial activity against 11 pathogenic bacterial species. methanol extracts of 11 plant species showed significant antibacterial activity. malva moschata and prunus padus were active against five bacterial species, reseda lutea against four, centaurium eryth ... | 2002 | 12413709 |
| anatomy of subterranean organs of medicinally used cardueae and related species and its value for discrimination. | numerous species of the asteraceae, the composites, are famous for their use in both traditional and conventional medicine. reliable anatomical descriptions of these plants and of possible adulterations provide a basis for fast identification and cheap purity controls of respective medicinal drugs by means of light microscopy. nevertheless, detailed comparative studies on root and rhizome anatomy of valuable as well as related inconsiderable composite plants are largely missing yet. the presente ... | 2011 | 21617780 |
| investigating the potential of under-utilised plants from the asteraceae family as a source of natural antimicrobial and antioxidant extracts. | antimicrobial properties of ethanol and water extracts from eight asteraceae species were investigated against three gram positive (staphylococcus aureus, mrsa and bacillus cereus) and two gram negative (escherichia coli and salmonella typhimurium) bacterial strains. ethanol extracts from centaurea scabiosa, arctium minus, taraxacum officinale, centaurea nigra and cirsium palustre demonstrated antimicrobial activity against strains of s. aureus, mrsa and b. cereus (mic=187.5-365μg/ml). ethanol e ... | 2014 | 24837924 |
| optimum yields of dibenzylbutyrolactone-type lignans from cynareae fruits, during their ripening, germination and enzymatic hydrolysis processes, determined by on-line chromatographic methods. | dibenzylbutyrolactone-type lignans are the physiologically active constituents of the achene fruits of cynareae. these lignans occur in glycoside/aglycone forms: in the highest quantity of the arctiin/arctigenin, matairesinoside/matairesinol and tracheloside/trachelogenin pairs found in the fruits of arctium lappa l., centaurea scabiosa l. and cirsium arvense (l.) scop. | 2013 | 22396124 |
| pollination niche overlap between a parasitic plant and its host. | niche theory predicts that species which share resources should evolve strategies to minimise competition for those resources, or the less competitive species would be extirpated. some plant species are constrained to co-occur, for example parasitic plants and their hosts, and may overlap in their pollination niche if they flower at the same time and attract the same pollinators. using field observations and experiments between 1996 and 2006, we tested a series of hypotheses regarding pollinatio ... | 2007 | 17146683 |
| a new method for in situ measurement of bt-maize pollen deposition on host-plant leaves. | maize is wind pollinated and produces huge amounts of pollen. in consequence, the cry toxins expressed in the pollen of bt maize will be dispersed by wind in the surrounding vegetation leading to exposure of non-target organisms (nto). nto like lepidopteran larvae may be affected by the uptake of bt-pollen deposited on their host plants. although some information is available to estimate pollen deposition on host plants, recorded data are based on indirect measurements such as shaking or washing ... | 2011 | 26467496 |
| changes in stomatal behaviour in the calcicole leontodon hispidus due to the disruption by ozone of the regulation of apoplastic ca2+ by trichomes. | regulation of the concentration of ca2+ in the apoplast of plants is essential in order to allow ca(2+)-dependent processes, such as ca(2+)-mediated signal transduction in stomatal guard cells, to function correctly. this is particularly important for plants growing with high levels of ca2+ in the rhizosphere. recently, we have shown that in two calcicoles, leontodon hispidus l. and centaurea scabiosa l., trichomes play a key role in this regulatory process. ozone is known to have a marked effec ... | 2001 | 11762166 |
| [alteration of polymorphic systems of centaurea scabiosa l. under chronic irradiation]. | isoenzyme and morphological polymorphism alteration in populations of perennial grass centaurea scabiosa l. (scaly cornflower) has been studied. these populations exist on the territory of east ural radioactive trace more than 40 years and are chronically exposed to beta-irradiation. directional shift of allele frequencies on the loci per1, pgi2, sod1, lap has been detected. the fact of accumulating genetic load by chronically irradiated populations has been demonstrated. possible reasons of dis ... | 2016 | 10689429 |
| [the genetic processes in chronically irradiated natural populations of centaurea scabiosa l. growing in the eastern urals radioactive trace]. | the examination of chronically irradiated natural populations of c. scabiosa l. have been carried out for 30 years at the territory of the east urals radioactive trial. by using of different tests (frequency of aberrant cells, chlorophyll mutations and mutations in lap locus) the mutation rates in chronically irradiated populations and in the control natural populations were compared. it was shown that long-term radiation influence caused changes in population genetic structure due to induction ... | 2016 | 7489106 |