Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.475 [Categoria DeCS]
Referências encontradas : 32 [refinar]
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[PMID]:29386016
[Au] Autor:Ali S; Khan MR; Irfanullah; Sajid M; Zahra Z
[Ad] Endereço:Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
[Ti] Título:Phytochemical investigation and antimicrobial appraisal of Parrotiopsis jacquemontiana (Decne) Rehder.
[So] Source:BMC Complement Altern Med;18(1):43, 2018 Jan 31.
[Is] ISSN:1472-6882
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Parrotiopsis jacquemontiana (Decne) Rehder. is locally used for skin infections and in wound healing. In this study we have evaluated methanol extract of its leaves and derived fractions against the clinical multi-drug resistant bacterial strains. METHODS: P. jacquemontiana leaves powder extracted with 95% methanol (PJM) and fractionated in escalating polarity of solvents; n-hexane (PJH), chloroform (PJC), ethyl acetate (PJE), n-butanol (PJB) and the remaining as aqueous fraction (PJA). Clinical as well as environmental 19 bacterial strains and 8 fungal strains were screened for minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC). Preliminary phytochemical investigation for various phytochemical classes was also carried out. RESULTS: PJM contained the coumarins, phenols, flavonoids, tannins, alkaloids, glycosides, saponins, sterols, phlobatannins, steroids, phytosterols, triterpenoids, acids, quinones, proteins, vitamin C, betacyanins, oils and resins while anthraquinones, phytosteroids, carbohydrates and anthocyanins were not detected. Disc diffusion assay (1 mg/disc) indicated the sensitivity of all the MDR strains of bacteria with PJM, PJE and PJB, while no inhibition was recorded with PJA. PJH and PJC inhibited the growth of all the strains of Staphylococcus aureus, Pseudomonas aeruginosa and Coagulase negative staphylococci used in this study. Maximum zone of inhibition (35.5 ± 1.32 mm) was obtained with PJM against Staphylococcus lugdenesis MDR (6197). Comparatively lower MIC (8-64 µg/ml) and MBC (32-256 µg/ml) values were recorded for PJM and PJE. In case of fungal strains only PJM, PJE and PJB markedly inhibited the growth and lower MIC (8-128 µg/ml) and MFC (32-512 µg/ml) values were determined for PJM and PJE. CONCLUSION: The remarkable inhibition of various bacterial and fungal strains at low doses of the extract/fractions suggested the strong antibacterial, antifungal and anti-candidal potential of P. jacquemontiana leaves.
[Mh] Termos MeSH primário: Anti-Infecciosos/farmacologia
Hamamelidaceae/química
Extratos Vegetais/farmacologia
[Mh] Termos MeSH secundário: Anti-Infecciosos/química
Anti-Infecciosos/isolamento & purificação
Bactérias/efeitos dos fármacos
Fungos/efeitos dos fármacos
Testes de Sensibilidade Microbiana
Extratos Vegetais/química
Extratos Vegetais/isolamento & purificação
Folhas de Planta/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Infective Agents); 0 (Plant Extracts)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180202
[St] Status:MEDLINE
[do] DOI:10.1186/s12906-018-2114-z


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[PMID]:27737816
[Au] Autor:Charehsaz M; Reis R; Helvacioglu S; Sipahi H; Guzelmeric E; Acar ET; Cicek G; Yesilada E; Aydin A
[Ad] Endereço:Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Yeditepe University, Kayisdagi, Atasehir, 34755 Istanbul, Turkey. Electronic address: mohammad.saz@yeditepe.edu.tr.
[Ti] Título:Safety evaluation of styrax liquidus from the viewpoint of genotoxicity and mutagenicity.
[So] Source:J Ethnopharmacol;194:506-512, 2016 Dec 24.
[Is] ISSN:1872-7573
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:ETHNOPHARMACOLOGICAL RELEVANCE: Styrax liquidus is a resinous exudate (balsam) obtained from the wounded trunk of the Liquidambar orientalis Mill. (Hamamelidaceae). Styrax has been used for treatment of various ailments in Turkish folk medicine such as skin problems, peptic ulcers, nocturnal enuresis, parasitic infections, antiseptic or as expectorant. AIM OF STUDY: In spite of frequent use of styrax in Turkish folk medicine as well as once as a stabilizer in perfumery industry, negative reports have been noticed by the international authority for restriction its use based on some limited evidences from an in vitro study. The aim of the present study was to evaluate the genotoxic and cytotoxic potential of styrax and its ethanolic extract using in vivo and in vitro assays, as well as an antimutagenic assay and also to determine its phenolic constituents with chromatographic analysis. MATERIALS AND METHODS: In vitro mutagenicity and antimutagenicity of styrax and its ethanolic extract were evaluated by Ames test performed on Salmonella TA98 and TA100 strains with and without metabolic activation (10- 30,000µg/plate). The genotoxicity was also studied in vivo by chromosomal aberrations assay on bone marrow of Balb C mice with different its concentrations (500-2000mg/kg body weight). Cytotoxicity has been evaluated by the MTT assay using L929 cell line. Its phenolic constituents were determined by HPLC analysis. RESULTS: Genotoxicological investigations of styrax or its ethanolic extract showed that none of the tested concentrations induced a significant increase in the revertant number of TA98 and TA100 strains with or without metabolic activation, indicating no mutagenicity to the tested strains. Also results indicated that up to 2000mg/kg body weight, styrax is not genotoxic in mammalian bone marrow chromosome aberration test in vivo. In cytotoxicity study, the IC values of styrax and its ethanolic extract were found to be 50.22±1.80 and 59.69±11.77µg/mL, respectively. Among the studied reference standards the major phenolic acids in styrax balsam was found to be p-coumaric acid (2.95mg/g), while in its ethanolic extract not only p-coumaric acid (11.46mg/g), but also gallic acid (1.60mg/g) were found to the main components. CONCLUSION: The findings of the present study provide scientific basis to the safety of styrax from the viewpoint of genotoxicity risk, and in fact, it was found to be beneficial against genotoxicity.
[Mh] Termos MeSH primário: Hamamelidaceae/química
Extratos Vegetais/toxicidade
[Mh] Termos MeSH secundário: Animais
Concentração Inibidora 50
Masculino
Camundongos
Camundongos Endogâmicos BALB C
Testes de Mutagenicidade
Extratos Vegetais/uso terapêutico
Ratos
Ratos Sprague-Dawley
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Extracts)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170421
[Lr] Data última revisão:
170421
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161015
[St] Status:MEDLINE


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[PMID]:27696407
[Au] Autor:Yoon IS; Park DH; Ki SH; Cho SS
[Ad] Endereço:Department of Pharmacy, College of Pharmacy, Mokpo National University, Muan, Jeonnam, Korea.
[Ti] Título:Effects of extracts from Corylopsis coreana Uyeki (Hamamelidaceae) flos on xanthine oxidase activity and hyperuricemia.
[So] Source:J Pharm Pharmacol;68(12):1597-1603, 2016 Dec.
[Is] ISSN:2042-7158
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: This study aims to investigate xanthine oxidase (XO) inhibitory activity and antihyperuricemic effects of Corylopsis coreana Uyeki flos extracts and the phytochemicals contained therein. METHODS: Ethanolic extracts of the plant were prepared, and the extraction process was optimized with respect to flavonoid content and XO inhibitory activity. The optimized ethanolic extract was tested for its XO inhibitory activity and antihyperuricemic effects in potassium oxonate-induced hyperuricemic mice. KEY FINDINGS: The 80% ethanolic extract showed the highest total flavonoid content and in-vitro XO inhibitory activity. In-vivo studies demonstrated that the optimized 80% ethanolic extract could inhibit hepatic XO activity and significantly alleviate hyperuricemia at a relatively low oral dose (50 mg/kg) in mice. Additionally, an in-vitro enzyme inhibition study showed that phytochemicals such as bergenin, isosalipurposide, quercetin and quercitrin may be the key constituents responsible for the observed antihyperuricemic effects of the extract. CONCLUSIONS: This study is the first report on the XO inhibitory and antihyperuricemic effects of C. coreana Uyeki flos extract, which can be therapeutically applied in treating hyperuricemia and gout.
[Mh] Termos MeSH primário: Inibidores Enzimáticos/farmacologia
Supressores da Gota/farmacologia
Hamamelidaceae/química
Hiperuricemia/tratamento farmacológico
Fígado/efeitos dos fármacos
Compostos Fitoquímicos/farmacologia
Extratos Vegetais/farmacologia
Ácido Úrico/sangue
Xantina Oxidase/antagonistas & inibidores
[Mh] Termos MeSH secundário: Animais
Biomarcadores/sangue
Modelos Animais de Doenças
Relação Dose-Resposta a Droga
Inibidores Enzimáticos/isolamento & purificação
Etanol/química
Flores
Supressores da Gota/isolamento & purificação
Hiperuricemia/sangue
Hiperuricemia/induzido quimicamente
Hiperuricemia/enzimologia
Fígado/enzimologia
Masculino
Camundongos Endogâmicos ICR
Ácido Oxônico
Compostos Fitoquímicos/isolamento & purificação
Fitoterapia
Extratos Vegetais/isolamento & purificação
Plantas Medicinais
Solventes/química
Xantina Oxidase/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (Enzyme Inhibitors); 0 (Gout Suppressants); 0 (Phytochemicals); 0 (Plant Extracts); 0 (Solvents); 268B43MJ25 (Uric Acid); 3K9958V90M (Ethanol); 4R7FFA00RX (potassium oxonate); 5VT6420TIG (Oxonic Acid); EC 1.17.3.2 (Xanthine Oxidase)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170516
[Lr] Data última revisão:
170516
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161004
[St] Status:MEDLINE
[do] DOI:10.1111/jphp.12626


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[PMID]:27369764
[Au] Autor:Sugai K; Setsuko S
[Ad] Endereço:Laboratory of Wildlife Ecology, Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki, 305-8687, Japan. sugaikyoko15@gmail.com.
[Ti] Título:Novel microsatellite markers for Distylium lepidotum (Hamamelidaceae) endemic to the Ogasawara Islands.
[So] Source:BMC Res Notes;9:332, 2016 Jul 02.
[Is] ISSN:1756-0500
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Distylium lepidotum is a small tree endemic to the Ogasawara Islands located in the northwestern Pacific Ocean. This species is a sole food for an endemic locust, Boninoxya anijimensis. Here, we developed microsatellite markers to investigate genetic diversity and genetic structure and to avoid a genetic disturbance after transplantation to restore the Ogasawara Islands ecosystem. RESULTS: Microsatellite markers with perfect dinucleotide repeats were developed using the next-generation sequencing Illumina MiSeq Desktop Sequencer. Thirty-two primer pairs were characterized in two D. lepidotum populations on Chichijima and Hahajima Islands of the Ogasawara Islands. The number of alleles for the markers ranged from three to 23 per locus in the two populations. Expected heterozygosity per locus in each population ranged from 0.156 to 0.940 and 0.368 to 0.845, respectively. CONCLUSIONS: These microsatellite markers will be useful for future population genetics studies of D. lepidotum and provide a basis for conservation management of the Ogasawara Islands.
[Mh] Termos MeSH primário: Genética Populacional
Hamamelidaceae/genética
Repetições de Microssatélites
Filogenia
Isolamento Reprodutivo
[Mh] Termos MeSH secundário: Alelos
Conservação dos Recursos Naturais
Ecossistema
Loci Gênicos
Variação Genética
Hamamelidaceae/classificação
Heterozigoto
Sequenciamento de Nucleotídeos em Larga Escala
Ilhas
Japão
Oceano Pacífico
Árvores/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1701
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160703
[St] Status:MEDLINE
[do] DOI:10.1186/s13104-016-2137-9


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[PMID]:26784157
[Au] Autor:Seo JH; Kim JE; Shim JH; Yoon G; Bang MA; Bae CS; Lee KJ; Park DH; Cho SS
[Ad] Endereço:Department of Oriental Medicine Materials, Dongshin University, Naju, Jeonnam 520-714, Korea. wlgpsid7156@naver.com.
[Ti] Título:HPLC Analysis, Optimization of Extraction Conditions and Biological Evaluation of Corylopsis coreana Uyeki Flos.
[So] Source:Molecules;21(1):94, 2016 Jan 15.
[Is] ISSN:1420-3049
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:A method for the separation and quantification of three flavonoids and one isocoumarin by reverse-phase high performance liquid chromatography (HPLC) has been developed and validated. Four constituents present in a crude ethanolic extract of the flowers of Coryloposis coreana Uyeki, were analyzed. Bergenin, quercetin, quercitrin and isosalipurposide were used as calibration standards. In the present study, an excellent linearity was obtained with an r² higher than 0.999. The chromatographic peaks showed good resolution. In combination with other validation data, including precision, specificity, and accuracy, this method demonstrated good reliability and sensitivity, and can be conveniently used for the quantification of bergenin, quercetin, quercitrin and isosalipurposide in the crude ethanolic extract of C. coreana Uyeki flos. Furthermore, the plant extracts were analyzed with HPLC to determine the four constituents and compositional differences in the extracts obtained under different extraction conditions. Several extracts of them which was dependent on the ethanol percentage of solvent were also analyzed for their antimicrobial and antioxidant activities. One hundred % ethanolic extract from C. coreana Uyeki flos showed the best antimicrobial activity against the methicillin-resistant Staphylococcus aureus (MRSA) strain. Eighty % ethanolic extract showed the best antioxidant activity and phenolic content. Taken of all, these results suggest that the flower of C. coreana Uyeki flos may be a useful source for the cure and/or prevention of septic arthritis, and the validated method was useful for the quality control of C. coreana Uyeki.
[Mh] Termos MeSH primário: Antibacterianos/isolamento & purificação
Anti-Inflamatórios/isolamento & purificação
Antioxidantes/isolamento & purificação
Flavonoides/isolamento & purificação
Hamamelidaceae/química
Isocumarinas/isolamento & purificação
[Mh] Termos MeSH secundário: Antibacterianos/química
Antibacterianos/farmacologia
Anti-Inflamatórios/química
Anti-Inflamatórios/farmacologia
Antioxidantes/química
Antioxidantes/farmacologia
Benzopiranos/química
Benzopiranos/isolamento & purificação
Calibragem
Chalconas/química
Chalconas/isolamento & purificação
Cromatografia Líquida de Alta Pressão
Cromatografia de Fase Reversa
Etanol
Flavonoides/química
Flavonoides/farmacologia
Flores/química
Seres Humanos
Isocumarinas/química
Isocumarinas/farmacologia
Staphylococcus aureus Resistente à Meticilina/efeitos dos fármacos
Staphylococcus aureus Resistente à Meticilina/crescimento & desenvolvimento
Extratos Vegetais/química
Quercetina/análogos & derivados
Quercetina/química
Quercetina/isolamento & purificação
Padrões de Referência
Sensibilidade e Especificidade
Solventes
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Anti-Inflammatory Agents); 0 (Antioxidants); 0 (Benzopyrans); 0 (Chalcones); 0 (Flavonoids); 0 (Isocoumarins); 0 (Plant Extracts); 0 (Solvents); 2Y8906LC5P (quercitrin); 3K9958V90M (Ethanol); 4547-85-7 (isosalipurposide); 9IKM0I5T1E (Quercetin); L84RBE4IDC (bergenin)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160120
[St] Status:MEDLINE


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[PMID]:27352536
[Au] Autor:Lu HX; Wu ZL; Liang WJ; Chen ML; Huang BB; Wei QQ
[Ti] Título:[Chemical Constituents from Semiliquidambar cathayensis Roots].
[So] Source:Zhong Yao Cai;38(12):2543-6, 2015 Dec.
[Is] ISSN:1001-4454
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:OBJECTIVE: To study the chemical constituents from the roots of Semiliquidambar cathayensis. METHODS: The roots of Semiliquidambar cathayensis were extracted with 80% ethanol for reflux. Chemical constituents were isolated by silica gel chromatography and Sephadex LH-20 column chromatography from petrol ether part and ethyl acetate part of extracts. Their structures were identified on the basis of physico-chemical characters and spectroscopic analysis. RESULTS: Eleven compounds were obtained from the roots of Semiliquidambar cathayensis, and identified as 3-acetyl-12-ene-oleanolic acid methyl ester (1), ß-sitosterol (2), 3-acetyl-12-ene-oleanol-ic acid (3), 2α,3ß-dihydroxy-lup-20(29)-en-28-oic acid (4), (24R)-5α-stignast-3,6-dione (5), betulonic acid (6), stearic acid (7), hexadecanoic acid (8), 3-oxo-olean-12-en-28-oic acid (9), arjunolic acid (10) and daucosterol (11). CONCLUSION: Compounds 1,3 - 6 and 8 are isolated from this genus for the first time.
[Mh] Termos MeSH primário: Hamamelidaceae/química
Compostos Fitoquímicos/análise
Raízes de Plantas/química
Plantas Medicinais/química
[Mh] Termos MeSH secundário: Extratos Vegetais/química
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Phytochemicals); 0 (Plant Extracts)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160629
[Lr] Data última revisão:
160629
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160630
[St] Status:MEDLINE


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[PMID]:26785544
[Au] Autor:Ji G; Xu MG; Wen SL; Wang BR; Zhang L; Liu LS
[Ti] Título:[Characteristics of soil pH and exchangeable acidity in red soil profile under different vegetation types].
[So] Source:Ying Yong Sheng Tai Xue Bao;26(9):2639-45, 2015 Sep.
[Is] ISSN:1001-9332
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:The characteristics of soil pH and exchangeable acidity in soil profile under different vegetation types were studied in hilly red soil regions of southern Hunan Province, China. The soil samples from red soil profiles within 0-100 cm depth at fertilized plots and unfertilized plots were collected and analyzed to understand the profile distribution of soil pH and exchangeable acidity. The results showed that, pH in 0-60 cm soil from the fertilized plots decreased as the following sequence: citrus orchard > Arachis hypogaea field > tea garden. As for exchangeable acidity content, the sequence was A. hypogaea field ≤ citrus orchard < tea garden. After tea tree and A. hypogaea were planted for long time, acidification occurred in surface soil (0-40 cm), compared with the deep soil (60-100 cm), and soil pH decreased by 0.55 and 0.17 respectively, but such changes did not occur in citrus orchard. Soil pH in 0-40 cm soil from the natural recovery vegetation unfertilized plots decreased as the following sequence: Imperata cylindrica land > Castanea mollissima garden > Pinus elliottii forest ≥ Loropetalum chinensis forest. As for exchangeable acidity content, the sequence was L cylindrica land < C. mollissima garden < L. chinensis forest ≤ P. elliottii forest. Soil pH in surface soil (0-20 cm) from natural forest plots, secondary forest and Camellia oleifera forest were significantly lower than that from P. massoniana forest, decreased by 0.34 and 0.20 respectively. For exchangeable acidity content in 0-20 cm soil from natural forest plot, P. massoniana forest and secondary forest were significantly lower than C. oleifera forest. Compared with bare land, surface soil acidification in unfertilized plots except I. cylindrica land had been accelerated, and the natural secondary forest was the most serious among them, with surface soil pH decreasing by 0.52. However, the pH increased in deep soils from unfertilized plots except natural secondary forest, and I. cylindrica land was the most obvious among them, with soil pH increasing by 0.43. The effects of fertilization and vegetation type on pH and exchangeable acidity decreased with the increasing soil depth from all plots.
[Mh] Termos MeSH primário: Florestas
Pradaria
Concentração de Íons de Hidrogênio
Solo/química
[Mh] Termos MeSH secundário: Arachis
Camellia sinensis
China
Citrus
Fagaceae
Hamamelidaceae
Pinus
Poaceae
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil)
[Em] Mês de entrada:1603
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160121
[St] Status:MEDLINE


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[PMID]:26505383
[Au] Autor:Zhang H; Ji WL; Li M; Zhou LY
[Ad] Endereço:College of Landscape Architecture and Arts, Northwest A & F University, Yangling, Shaanxi Province, China.
[Ti] Título:Genetic variation and genetic structure of the endangered species Sinowilsonia henryi Hemsi. (Hamamelidaceae) revealed by amplified fragment length polymorphism (AFLP) markers.
[So] Source:Genet Mol Res;14(4):12340-51, 2015 Oct 14.
[Is] ISSN:1676-5680
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:Comprehensive research of genetic variation is crucial in designing conservation strategies for endangered and threatened species. Sinowilsonia henryi Hemsi. is a tertiary relic with a limited geographical distribution in the central and western areas of China. It is endangered because of climate change and habitat fragmentation over the last thousands of years. In this study, amplified fragment length polymorphism markers were utilized to estimate genetic diversity and genetic structure in and among S. henryi. In this study, Nei's genetic diversity and Shannon's information index were found to be 0.192 and 0.325 respectively, indicating a moderate-to-high genetic diversity in species. According to analysis of molecular variation results, 32% of the genetic variation was shown to be partitioned among populations, demonstrating a relatively high genetic divergence; this was supported by principal coordinate analysis and unweighted pair-group method with arithmetic average analysis. Moreover, the Mantel test showed that there was no significant correlation between genetic and geographical distances. The above results can be explained by the effects of habitat fragmentation, history traits, and gene drift. Based on the results, several implications were indicated and suggestions proposed for preservation strategies for this species.
[Mh] Termos MeSH primário: Espécies em Perigo de Extinção
Variação Genética/genética
Hamamelidaceae/genética
Polimorfismo Genético/genética
[Mh] Termos MeSH secundário: Análise do Polimorfismo de Comprimento de Fragmentos Amplificados
Mudança Climática
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151028
[Lr] Data última revisão:
151028
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151028
[St] Status:MEDLINE
[do] DOI:10.4238/2015.October.14.1


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[PMID]:26259450
[Au] Autor:Liu ZB; Cheng RM; Xiao WF; Guo QS; Wang N
[Ti] Título:[Light response characteristics of photosynthesis and model comparison of Distylium chinense in different flooding durations].
[So] Source:Ying Yong Sheng Tai Xue Bao;26(4):1083-90, 2015 Apr.
[Is] ISSN:1001-9332
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:The light responses of photosynthesis of two-year-old Distytum chinense seedlings subjected to a simulated reservoir flooding environment in autumn and winter seasons were measured by using a Li-6400 XT portable photosynthesis system, and the light response curves were fitted and analyzed by three models of the rectangular hyperbola, non-rectangular hyperbola and modified rectangular hyperbola to investigate the applicability of different light response models for the D. chinense in different flooding durations and the adaption regulation of light response parameters to flooding stress. The results showed that the fitting effect of the non-rectangular hyperbola model for light response process of D. chinense under normal growth condition and under short-term flooding (15 days of flooding) was better than that of the other two models, while the fitting effect of the modified rectangular hyperbola model for light response process of D. chinense under longer-term flooding (30, 45 and 60 days of flooding) was better than that of the other two models. The modified rectangular hyperbola model gave the best fitted results of light compensation point (LCP) , maximum net photosynthetic rate (P(n max)) and light saturation point (LSP), and the non-rectangular hyperbola model gave the best fitted result of dark respiration rate (R(d)). The apparent quantum yield (Φ), P(n max) and LSP of D. chinense gradually decreased, and the LCP and R(d) of D. chinense gradually increased in early flooding (30 days), but D. chinense gradually produced adaptability for flooding as the flooding duration continued to increase, and various physiological indexes were gradually stabilized. Thus, this species has adaptability to some degree to the flooding environment.
[Mh] Termos MeSH primário: Inundações
Hamamelidaceae/fisiologia
Hamamelidaceae/efeitos da radiação
Fotossíntese
[Mh] Termos MeSH secundário: Luz
Modelos Teóricos
Estações do Ano
Plântulas/fisiologia
Plântulas/efeitos da radiação
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE
[Em] Mês de entrada:1601
[Cu] Atualização por classe:161018
[Lr] Data última revisão:
161018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150812
[St] Status:MEDLINE


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[PMID]:25515015
[Au] Autor:Yuan N; Comes HP; Cao YN; Guo R; Zhang YH; Qiu YX
[Ad] Endereço:Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education, Department of Ecology, College of Life Sciences, Zhejiang University, Hangzhou, China.
[Ti] Título:A comparative study on genetic effects of artificial and natural habitat fragmentation on Loropetalum chinense (Hamamelidaceae) in Southeast China.
[So] Source:Heredity (Edinb);114(6):544-51, 2015 Jun.
[Is] ISSN:1365-2540
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Elucidating the demographic and landscape features that determine the genetic effects of habitat fragmentation has become fundamental to research in conservation and evolutionary biology. Land-bridge islands provide ideal study areas for investigating the genetic effects of habitat fragmentation at different temporal and spatial scales. In this context, we compared patterns of nuclear microsatellite variation between insular populations of a shrub of evergreen broad-leaved forest, Loropetalum chinense, from the artificially created Thousand-Island Lake (TIL) and the Holocene-dated Zhoushan Archipelago of Southeast China. Populations from the TIL region harboured higher levels of genetic diversity than those from the Zhoushan Archipelago, but these differences were not significant. There was no correlation between genetic diversity and most island features, excepting a negative effect of mainland-island distance on allelic richness and expected heterozygosity in the Zhoushan Archipelago. In general, levels of gene flow among island populations were moderate to high, and tests of alternative models of population history strongly favoured a gene flow-drift model over a pure drift model in each region. In sum, our results showed no obvious genetic effects of habitat fragmentation due to recent (artificial) or past (natural) island formation. Rather, they highlight the importance of gene flow (most likely via seed) in maintaining genetic variation and preventing inter-population differentiation in the face of habitat 'insularization' at different temporal and spatial scales.
[Mh] Termos MeSH primário: Ecossistema
Variação Genética
Genética Populacional
Hamamelidaceae/genética
[Mh] Termos MeSH secundário: Alelos
China
DNA de Plantas/genética
Fluxo Gênico
Deriva Genética
Loci Gênicos
Genótipo
Ilhas
Repetições de Microssatélites
Modelos Genéticos
Análise de Sequência de DNA
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Plant)
[Em] Mês de entrada:1508
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141218
[St] Status:MEDLINE
[do] DOI:10.1038/hdy.2014.114



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