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https://www.readbyqxmd.com/read/28182646/complete-chloroplast-genomes-from-apomictic-taraxacum-asteraceae-identity-and-variation-between-three-microspecies
#1
Rubar Hussein M Salih, Ľuboš Majeský, Trude Schwarzacher, Richard Gornall, Pat Heslop-Harrison
Chloroplast DNA sequences show substantial variation between higher plant species, and less variation within species, so are typically excellent markers to investigate evolutionary, population and genetic relationships and phylogenies. We sequenced the plastomes of Taraxacum obtusifrons Markl. (O978); T. stridulum Trávniček ined. (S3); and T. amplum Markl. (A978), three apomictic triploid (2n = 3x = 24) dandelions from the T. officinale agg. We aimed to characterize the variation in plastomes, define relationships and correlations with the apomictic microspecies status, and refine placement of the microspecies in the evolutionary or phylogenetic context of the Asteraceae...
2017: PloS One
https://www.readbyqxmd.com/read/28158284/impacts-of-fire-on-non-native-plant-recruitment-in-black-spruce-forests-of-interior-alaska
#2
Xanthe J Walker, Matthew D Frey, Alexandra J Conway, Mélanie Jean, Jill F Johnstone
Climate change is expected to increase the extent and severity of wildfires throughout the boreal forest. Historically, black spruce (Picea mariana (Mill.) B.S.P.) forests in interior Alaska have been relatively free of non-native species, but the compounding effects of climate change and an altered fire regime could facilitate the expansion of non-native plants. We tested the effects of wildfire on non-native plant colonization by conducting a seeding experiment of non-native plants on different substrate types in a burned black spruce forest, and surveying for non-native plants in recently burned and mature black spruce forests...
2017: PloS One
https://www.readbyqxmd.com/read/28157176/the-essential-oil-of-monarda-didyma-l-lamiaceae-exerts-phytotoxic-activity-in-vitro-against-various-weed-seed
#3
Donata Ricci, Francesco Epifano, Daniele Fraternale
The chemical composition of the essential oil of the flowering aerial parts of Monarda didyma L. cultivated in central Italy was analyzed by Gas Chromatography/Mass Spectrometry (GC/MS). The major compounds of the oil were thymol (59.3%), p-cymene (10.3%), terpinolene (9.2%), δ-3-carene (4.4%), myrcene (3.7%), and camphene (3.4%). The essential oil was tested in vitro for its anti-germination activity against Papaver rhoeas L., Taraxacum officinale F. H. Wigg., Avena fatua L., Raphanus sativus L. and Lepidium sativum L...
February 2, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28152978/chloroplast-genome-resources-and-molecular-markers-differentiate-rubber-dandelion-species-from-weedy-relatives
#4
Yingxiao Zhang, Brian J Iaffaldano, Xiaofeng Zhuang, John Cardina, Katrina Cornish
BACKGROUND: Rubber dandelion (Taraxacum kok-saghyz, TK) is being developed as a domestic source of natural rubber to meet increasing global demand. However, the domestication of TK is complicated by its colocation with two weedy dandelion species, Taraxacum brevicorniculatum (TB) and the common dandelion (Taraxacum officinale, TO). TB is often present as a seed contaminant within TK accessions, while TO is a pandemic weed, which may have the potential to hybridize with TK. To discriminate these species at the molecular level, and facilitate gene flow studies between the potential rubber crop, TK, and its weedy relatives, we generated genomic and marker resources for these three dandelion species...
February 2, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28077102/effects-of-aqueous-extracts-of-taraxacum-officinale-on-expression-of-tumor-necrosis-factor-alpha-and-intracellular-adhesion-molecule-1-in-lps-stimulated-rmmvecs
#5
Ge Hu, Junjie Wang, Dong Hong, Tao Zhang, Huiqin Duan, Xiang Mu, Zuojun Yang
BACKGROUND: Mastitis gives rise to big financial burden to farm industry (mainly dairy production) and public health. Its incidence is currently high and therefore, highly effective treatments for therapy, especially with natural products are required. Taraxacum officinale has been reported to use for anti-inflammation. However, its effect on endothelium during mastitis has not been reported. METHODS: We firstly established inflammation experimental model of rat mammary microvascular endothelial cells (RMMVECs)...
January 11, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28074843/sexy-males-and-sexless-females-the-origin-of-triploid-apomicts
#6
P Muralidhar, D Haig
Apomixis and polyploidy are closely associated in angiosperms, but the evolutionary reason for this association is unknown. Taraxacum officinale, the common dandelion, exists both as diploid sexuals and triploid apomicts. Here, in the context of T. officinale, we provide a model of the evolution of triploid apomicts from diploid sexuals. We posit an apomictic allele that arrests female meiosis in diploids, so that the plant produces diploid egg cells that can develop without fertilization, but haploid pollen...
January 11, 2017: Heredity
https://www.readbyqxmd.com/read/28026992/sesquiterpene-lactone-composition-and-cellular-nrf2-induction-of-taraxacum-officinale-leaves-and-roots-and-taraxinic-acid-%C3%AE-d-glucopyranosyl-ester
#7
Tuba Esatbeyoglu, Betina Obermair, Tabea Dorn, Karsten Siems, Gerald Rimbach, Marc Birringer
Taraxacum officinale, the common dandelion, is a plant of the Asteraceae family, which is used as a food and medical herb. Various secondary plant metabolites such as sesquiterpene lactones, triterpenoids, flavonoids, phenolic acids, coumarins, and steroids have been described to be present in T. officinale. Dandelion may exhibit various health benefits, including antioxidant, anti-inflammatory, and anticarcinogenic properties. We analyzed the leaves and roots of the common dandelion (T. officinale) using high-performance liquid chromatography/mass spectrometry to determine its sesquiterpene lactone composition...
January 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28012278/the-physiological-effects-of-dandelion-taraxacum-officinale-in-type-2-diabetes
#8
Fonyuy E Wirngo, Max N Lambert, Per B Jeppesen
The tremendous rise in the economic burden of type 2 diabetes (T2D) has prompted a search for alternative and less expensive medicines. Dandelion offers a compelling profile of bioactive components with potential anti-diabetic properties. The Taraxacum genus from the Asteraceae family is found in the temperate zone of the Northern hemisphere. It is available in several areas around the world. In many countries, it is used as food and in some countries as therapeutics for the control and treatment of T2D. The anti-diabetic properties of dandelion are attributed to bioactive chemical components; these include chicoric acid, taraxasterol (TS), chlorogenic acid, and sesquiterpene lactones...
July 2016: Review of Diabetic Studies: RDS
https://www.readbyqxmd.com/read/28011434/facile-and-green-synthesis-of-phytochemicals-capped-platinum-nanoparticles-and-in-vitro-their-superior-antibacterial-activity
#9
Kamran Tahir, Sadia Nazir, Aftab Ahmad, Baoshan Li, Arif Ullah Khan, Zia Ul Haq Khan, Faheem Ullah Khan, Qudrat Ullah Khan, Abrar Khan, Aziz Ur Rahman
The increase in the severe infectious diseases and resistance of the majority of the bacterial pathogens to the available drug is a serious problem now a day. In order to overcome this problem it is necessary to develop new therapeutic agents which are non-toxic and more effective to inhibit these microbial pathogens. For this purpose the plant extract of highly active medicinal plant, Taraxacum laevigatum was used for the synthesis of platinum nanoparticles (PtNPs) to enhance its bio-activities. The surface plasmon resonance peak appeared at 283nm clearly represent the formation of PtNPs...
January 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27939548/using-plant-wax-markers-to-estimate-the-diet-composition-of-grazing-holstein-dairy-cows
#10
C Heublein, K-H Südekum, F L Gill, F Dohme-Meier, F Schori
The objective of this study was to test whether diet selection of dairy cows under grazing conditions could be estimated using plant wax markers. Furthermore, differences between 2 cow strains and the effect of concentrate supplementation on plant species selection were investigated. The experiment was a study with a crossover design performed on an organic farm with 12 Swiss Holstein cows and 12 New Zealand Holstein cows. Both experimental periods consisted of a 21-d adaptation and a 7-d measurement period...
February 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/27923645/evaluation-of-antioxidant-activity-of-phenolic-fractions-from-the-leaves%C3%A2-and-petals-of-dandelion-in-human-plasma-treated-with-h2o2-and-h2o2-fe
#11
Dariusz Jędrejek, Bogdan Kontek, Bernadetta Lis, Anna Stochmal, Beata Olas
Taraxacum officinale (dandelion) is a widespread perennial of the Asteraceae family. Dandelion is a rich source of different bioactive compounds, including phenolic compounds, terpenes, carbohydrates, proteins, fatty acids, vitamin and minerals. However, the content of phenolics in tested extracts by various authors was not always well described. Dandelion is also a commonly available food with a long history of human use and as such poses little risk of harm. In this study, we focused on four different phenolic fractions from leaves and petals of dandelion, which might be of great interest...
January 25, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27922131/different-responses-of-alpine-plants-to-nitrogen-addition-effects-on-plant-plant-interactions
#12
Jun Wang, Peng Luo, Hao Yang, Chengxiang Mou, Li Mo
The different responses of plant species to resource stress are keys to understand the dynamics of plant community in a changing environment. To test the hypothesis that nitrogen (N) increase would benefit N competitive species, rather than N stress-tolerant species, to compete with neighbours, we conducted an experiment with neighbour removal, N addition and soil moisture as treatments in an alpine grassland on the southeastern Tibetan Plateau. Both growths and competitive-response abilities (CRA, the ability to tolerate the inhibitory effects of neighbors) of Kobresia macrantha, Polygonum viviparum and Potentilla anserine in wet site were facilitated by N addition, conversely, both growths and CRA of Taraxacum mongolicum and Ligularia virgaurea were suppressed by N addition, indicating that the responses of CRA of target species under N addition were consistent with the N utilization strategies of them...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27885764/development-of-rubber-enriched-dandelion-varieties-by-metabolic-engineering-of-the-inulin-pathway
#13
Anna Stolze, Alan Wanke, Nicole van Deenen, Roland Geyer, Dirk Prüfer, Christian Schulze Gronover
Natural rubber (NR) is an important raw material for a large number of industrial products. The primary source of NR is the rubber tree Hevea brasiliensis, but increased worldwide demand means that alternative sustainable sources are urgently required. The Russian dandelion (Taraxacum koksaghyz Rodin) is such an alternative because large amounts of NR are produced in its root system. However, rubber biosynthesis must be improved in order to develop T. koksaghyz into a commercially feasible crop. In addition to NR, T...
November 25, 2016: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27853873/change-of-plant-phenophases-explained-by-survival-modeling
#14
Barbara Templ, Stefan Fleck, Matthias Templ
It is known from many studies that plant species show a delay in the timing of flowering events with an increase in latitude and altitude, and an advance with an increase in temperature. Furthermore, in many locations and for many species, flowering dates have advanced over the long-term. New insights using survival modeling are given based on data collected (1970-2010) along a 3000-km long transect from northern to eastern central Europe. We could clearly observe that in the case of dandelion (Taraxacum officinale) the risk of flowering time, in other words the probability that flowering occurs, is higher for an earlier day of year in later decades...
November 16, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27845613/protective-effect-of-silybum-marianum-and-taraxacum-officinale-extracts-against-oxidative-kidney-injuries-induced-by-carbon-tetrachloride-in-rats
#15
Ali Karakuş, Yeter Değer, Serkan Yıldırım
The protective effect of the extracts of the plants Silybum marianum and Taraxacum officinale by carbon tetrachloride (CCl4) was researched. Sixty-six female Wistar albino rats were divided into six groups: Control, Silybum marianum, Taraxacum officinale, CCl4, Silybum marianum+ CCl4, Taraxacum officinale+CCl4. The Silybum marianum and Taraxacum officinale extracts were administered as 100 mg/kg/day by gavage. The CCl4 was administered as 1.5 mL/kg (i.p.). At the end of the trial period, in the serums obtained from the animals, in the CCl4 group it was found that the MDA level increased in the kidney tissue samples as well as in the ALP and GGT enzyme activities...
November 15, 2016: Renal Failure
https://www.readbyqxmd.com/read/27836777/anticancer-effects-of-ixeris-dentata-thunb-ex-thunb-nakai-extract-on-human-melanoma-cells-a375p-and-a375sm
#16
Hae Nim Lee, Seong Ah Shin, Gang Sik Choo, Hyeong Jin Kim, Young Seok Park, Byung Kwon Park, Byeong Soo Kim, Sang Ki Kim, Sung Dae Cho, Jeong Seok Nam, Chang Sun Choi, Ji Youn Jung
ETHNOPHARMACOLOGICAL RELEVANCE: The plant species Taraxacum coreanum (TC), Youngia sonchifolia (YS), and Ixeris dentata (ID) belong to the family Compositae and are used for medicinal purposes in traditional medicine. However, the anticancer effects of TC, YS, and ID extracts and the underlying molecular mechanisms in melanoma cells have not been elucidated. AIM OF THE STUDY: To investigate the potential anticancer effects of TC, YS, and ID extracts on human melanoma cells and explore the potential pharmacological mechanisms in vitro and in vivo...
December 24, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27821059/recent-and-dynamic-transposable-elements-contribute-to-genomic-divergence-under-asexuality
#17
Julie Ferreira de Carvalho, Victor de Jager, Thomas P van Gurp, Niels C A M Wagemaker, Koen J F Verhoeven
BACKGROUND: Transposable elements (TEs) are mobile pieces of genetic information with high mutagenic potential for the host genome. Transposition is often neutral or deleterious but may also generate potentially adaptive genetic variation. This additional source of variation could be especially relevant in non-recombining species reproducing asexually. However, evidence is lacking to determine the relevance of TEs in plant asexual genome evolution and their associated effects. Here, we characterize the repetitive fraction of the genome of the common dandelion, Taraxacum officinale and compare it between five accessions from the same apomictic lineage...
November 7, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27817005/pattern-of-callose-deposition-during-the-course-of-meiotic-diplospory-in-chondrilla-juncea-asteraceae-cichorioideae
#18
Krystyna Musiał, Maria Kościńska-Pająk
Total absence of callose in the ovules of diplosporous species has been previously suggested. This paper is the first description of callose events in the ovules of Chondrilla juncea, which exhibits meiotic diplospory of the Taraxacum type. We found the presence of callose in the megasporocyte wall and stated that the pattern of callose deposition is dynamically changing during megasporogenesis. At the premeiotic stage, no callose was observed in the ovules. Callose appeared at the micropylar pole of the cell entering prophase of the first meioticdivision restitution but did not surround the megasporocyte...
November 5, 2016: Protoplasma
https://www.readbyqxmd.com/read/27813704/temporal-variability-of-the-quality-of-taraxacum-officinale-seed-progeny-from-the-east-ural-radioactive-trace-is-there-an-interaction-between-low-level-radiation-and-weather-conditions
#19
Vera N Pozolotina, Elena V Antonova
HYPOTHESIS: The multiple stressors, in different combinations, may impact differently upon seed quality, and low-level doses of radiation may enhance synergistic or antagonistic effects. RESULTS: During 1991-2014 we investigated the quality of the dandelion (Taraxacum officinale s.l.) seed progeny growing under low-level radiation exposure at the East-Ural Radioactive Trace (EURT) area (result of the Kyshtym accident, Russia), and in plants from areas exposed to background radiation...
December 12, 2016: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/27794507/a-novel-survey-of-the-ethno-medicinal-knowledge-of-dental-problems-in-manoor-valley-northern-himalaya-pakistan
#20
Inayat Ur Rahman, Farhana Ijaz, Zafar Iqbal, Aftab Afzal, Niaz Ali, Muhammad Afzal, Muhammad Azhar Khan, Said Muhammad, Ghulam Qadir, Muhammad Asif
ETHNOPHARMACOLOGICAL RELEVANCE: In the study area, the traditional knowledge and cultural practices of utilizing medicinal plants in the human healthcare is primarily restricted to the old age members of the community, while younger generation is mostly unaware of the natural wealth usage. AIM OF THE STUDY: We provide the first ever ethno medicinal insights into the management of dental disorders in Pakistan. The prime objective of the study was to explore novel knowledge of these local and remote community members and share it with rest of the world in documented form...
December 24, 2016: Journal of Ethnopharmacology
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