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Daniela Luminita Ichim,Gogu Gheorghita,Mirela Campeanu,Cristian Campeanu
Analele ?tiin?ifice Ale Universit??ii Alexandru Ioan Cuza din Ia?i,Sectiunea II A : Genetica si Biologie Moleculara , 2005,
Abstract: The gamma radiations determined to the species of Echinacea purpurea (L) Moench on increase of the quantity of DNA, comparatively to control and to the species of Hypericum perforatum (L.), the decrease of the quantity of DNA (excepting the30 Gy dose witch hand a stimulative effect).
Research on the biology of Echinacea angustifolia (Dc.) Moench and Echinacea purpurea (L.) Moench  [cached]
Leon Sorin MUNTEAN,Alexandru SALONTAI,Mircea TAMAS,Constantin BOTEZ
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 1989,
Abstract: Echinacea angustifolia (Dc.) Moench and Echinacea purpurea (L.) Moench species have been highly appreciated for their therapeutic qualities, both of them belong to the few plants of immunostimulative and antiviral properties. The adaptation and cultivation process of these plants has been initiated for medical purposes at the Cluj-Napoca Agronomy Institute. The biological researches evidenced the two species, multiplied by nursery transplant, formed a rosette of leaves during their first year of plantation. The first floral offshoots in Echinacea purpurea were seen during the months September and October (in approximately 40 percent of plants). Flowering Echinacea angustifolia appeared only sporadically the first year of cultivation. Leaves number and plant mass in both species increased markedly the first year of vegetation starting from August. Herba and radix ratio represented 74 percent and 26 percent respectively of the whole plant mass in Echinacea angustifolia and 87 percent and 13 percent respectively in Echinacea purpurea.
Research on the biology of Echinacea pallida Nutt. and Echinacea purpurea (L.) Moench (II)  [cached]
Leon Sorin MUNTEAN,Alexandru SALONTAI,Constantin BOTEZ,Mircea TAMAS
Notulae Botanicae Horti Agrobotanici Cluj-Napoca , 1991,
Abstract: In the second year of vegetation, after emergence, Echinacea pallida Nutt. and Echinacea purpurea (L.) Moench, form a leaf rosette and the first floral shoots appear in June. Plant vigour is significantly higher in Echinacea purpurea than in E. pallida, saved for roots. E. pallida is tetraploid, 2n=4x=44 chromosomes, of small size, between 5,87 and 3,04 microns, relatively easy to individualize by their shape and size.
Elena Ciornea,Vlad Artenie,Daniela Ichim,Gogu Gheorghita
Analele ?tiin?ifice Ale Universit??ii Alexandru Ioan Cuza din Ia?i,Sectiunea II A : Genetica si Biologie Moleculara , 2004,
The morphology and yield of Hypericum perforatum L. in different regions of Western Siberia  [PDF]
Iryna I. Bayandina,Yulia V. Zagurskaya,Elena V. Dimina,O.O. Vronskaya
Modern Phytomorphology , 2012,
Abstract: It is established that linear characters of Hypericum perforatum don’t correlate with weight parameters of yield. The most important parameters of yield are the number of shoots of the first and second order, reproductive effort and a fructification index of plants.
Cadmium, Mercury and Lead in Hypericum perforatum L. collected in Western Serbia  [cached]
?urovi? D.,Bulat Z.,Buha A.,Matovic V.
E3S Web of Conferences , 2013, DOI: 10.1051/e3sconf/20130115009
Abstract: Wild population of Hypericum perforatum growing in Western Serbia was analyzed for the content of important environmental pollutants cadmium, mercury and lead. Metal contents were determined by inductively coupled plasma optical emission spectrometry. Obtained results showed that levels of mercury and lead were under while cadmium concentrations exceeded limits recommended for medicinal plants. High levels of cadmium in investigated plants can be the result of soil enriched with cadmium as well as the ability of Hypericum perforatum to accumulate cadmium.
The chemistry, pharmacology, and toxicology of the biologically active constituents of the herb Hypericum perforatum L.
Jiri Patocka
Journal of Applied Biomedicine , 2003,
Abstract: St. John's wort (Hypericum perforatum) has been used as a medical herb for over 2000 years. Overthe past two decades, its application as a standardized plant extract for treating depression hasundergone rigorous scientific investigation, and its effectiveness has been shown in studiescomparing it with other commonly used antidepressants and placebos. Safety and tolerability studieshave revealed that Hypericum preparations have better safety and tolerability profiles than syntheticantidepressants. The indications for St. John's wort preparations are mild or moderate depression.The mechanism of the antidepressant action of Hypericum extract is not fully known. The view ofthe chemical composition and pharmaceutical a toxicological properties of biologically activesubstances of Hypericum perforatum is the main purpose of this paper.
Effects of St John's Wort (Hypericum perforatum L.)?Extracts on Epileptogenesis  [PDF]
Vesna Ivetic,Svetlana Trivic,Marija Knezevic Pogancev,Mira Popovic,Janka Zlinská
Molecules , 2011, DOI: 10.3390/molecules16098062
Abstract: The purpose of this study was to investigate the effects of treatment with water, n-butanol and ether extracts of Hypercom perforatum L. on epileptogenesis in rabbits. Animals from the control group received solvent-ethanol, and the kindling model of epilepsy was used. Epileptic focus was induced in Chinchilla rabbits by stimulation of the hippocampus. The following parameters were determined: the minimum current strength necessary to induce after-discharge (AD) – discharges appearing after cessation of stimulation; AD duration; the number of stimulations necessary to induce spontaneous kindling; and the latency time for the development of full kindling. The results obtained indicate that epileptogenesis is influenced by Hypericum perforatum L. extract treatment. Animals treated with an ether extract of Hypericum perforatum L. required significantly weaker minimum current strengths for the development of epileptogenic focus, and displayed longer AD times, while the number of electro-stimulations necessary for full kindling was less. In contrast, animals treated with water and n-butanol extracts required increased electro-stimulations for the development of epileptic discharge, and displayed shortened AD durations versus controls.
Characters with multiple usages- phenotypic variability analysis at Echinacea purpurea (L.) Moench species  [PDF]
Mihai Radu POP
Analele Universitatii din Oradea, Fascicula Biologie , 2010,
Abstract: Merging aesthetics with utility, some medicinal plants can benefit both of a high production and decoration potential. This calls for diversification of improvement directions of the species. Through this article we suggest one of these species, Echinacea purpurea (L.) Moench. This is considered to be important at this time, acquisition of new biological forms - varieties in this species, which show multiple attributes utility based on key biological characteristics, agronomic, physiological, biochemical and agrochemical (medicinal, decorative, culinary etc.). To achieve this goal, studies were undertaken, given in this article, which is the starting point for selecting characters representative for our targets.The results presented in this study reveal a pronounced genetic polymorphism showing the selection operation can use the original material for a quantitative and qualitative differentiation of valuable genotypes that could be approved.
The Biomass Dosage Influences the Effects of Diethyl Aminoethyl Hexanoate on Micropropagation of Echinacea purpurea (L.) Moench  [PDF]
Xiaolu Chen, Dongliang Li, Junjie Zhang, Qingling Li, Yuesheng Yang, Hong Wu
Journal of Biosciences and Medicines (JBM) , 2016, DOI: 10.4236/jbm.2016.412014
The plant growth regulator diethyl aminoethyl hexanoate (DA-6) has proved highly effective on micropropagation of the medicinal plant purple coneflower (Echinacea purpurea (L.) Moench), however, sharp variation of the effects existed among explants in the same treatment, making the application of DA-6 in micropropagation difficult. In order to clarify factors that influencing the treating results of DA-6, explants with different biomass dosage were prepared and inoculated onto medium supplemented with different concentrations of DA-6. It was found that among the three kinds of biomass dosage explants, the lowest biomass explants required the lowest concentration of DA-6, and the highest biomass explants required the highest concentration of DA-6 for the best results on adventitious buds regeneration. Similar results were obtained when regenerated buds of three different biomass dosages were cultured. It could be concluded from the above experimental results that for achieving better DA-6 application results, the concentration of DA-6 should be determined not only by the types but also by the biomass dosage of the explants. The present finding might help to improve the micropropagation efficiency in E. purpurea, and might be applicable for other species

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