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Pesquisa : B01.650.940.800.575.912.250.341.998 [Categoria DeCS]
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[PMID]:28575004
[Au] Autor:Yu XQ; Drew BT; Yang JB; Gao LM; Li DZ
[Ad] Endereço:Germplasm Bank of Wild Species in Southwest China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, China.
[Ti] Título:Comparative chloroplast genomes of eleven Schima (Theaceae) species: Insights into DNA barcoding and phylogeny.
[So] Source:PLoS One;12(6):e0178026, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Schima is an ecologically and economically important woody genus in tea family (Theaceae). Unresolved species delimitations and phylogenetic relationships within Schima limit our understanding of the genus and hinder utilization of the genus for economic purposes. In the present study, we conducted comparative analysis among the complete chloroplast (cp) genomes of 11 Schima species. Our results indicate that Schima cp genomes possess a typical quadripartite structure, with conserved genomic structure and gene order. The size of the Schima cp genome is about 157 kilo base pairs (kb). They consistently encode 114 unique genes, including 80 protein-coding genes, 30 tRNAs, and 4 rRNAs, with 17 duplicated in the inverted repeat (IR). These cp genomes are highly conserved and do not show obvious expansion or contraction of the IR region. The percent variability of the 68 coding and 93 noncoding (>150 bp) fragments is consistently less than 3%. The seven most widely touted DNA barcode regions as well as one promising barcode candidate showed low sequence divergence. Eight mutational hotspots were identified from the 11 cp genomes. These hotspots may potentially be useful as specific DNA barcodes for species identification of Schima. The 58 cpSSR loci reported here are complementary to the microsatellite markers identified from the nuclear genome, and will be leveraged for further population-level studies. Phylogenetic relationships among the 11 Schima species were resolved with strong support based on the cp genome data set, which corresponds well with the species distribution pattern. The data presented here will serve as a foundation to facilitate species identification, DNA barcoding and phylogenetic reconstructions for future exploration of Schima.
[Mh] Termos MeSH primário: Cloroplastos/genética
Código de Barras de DNA Taxonômico
Genoma de Planta
Theaceae/genética
[Mh] Termos MeSH secundário: Filogenia
Especificidade da Espécie
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170926
[Lr] Data última revisão:
170926
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170603
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0178026


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[PMID]:28140744
[Au] Autor:Venkatesan T; Park EJ; Choi YW; Lee J; Kim YK
[Ad] Endereço:a Department of Forest products and Biotechnology , College of Forest Science, Kookmin University , Seoul , South Korea.
[Ti] Título:Anti-inflammatory activity of Ternstroemia gymnanthera stem bark extracts in bacterial lipopolysaccharide-stimulated RAW264.7 murine macrophage cells.
[So] Source:Pharm Biol;55(1):837-846, 2017 Dec.
[Is] ISSN:1744-5116
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:CONTEXT: Ternstroemia gymnanthera Sprague (Theaceae) possesses various known pharmacological properties. However, its anti-inflammatory activity has not been reported. OBJECTIVE: The anti-inflammatory activity of Ternstroemia gymnanthera stem bark aqueous extract (TGSBE) was evaluated using LPS-stimulated RAW264.7 macrophages. MATERIALS AND METHODS: Cytotoxicity was assessed by MTT assay after 24 h with TGSBE (25-200 µg/mL). Further testing used TGSBE at 100 and 200 µg/mL. Griess and ELISA methods after 24 h with TGSBE determined NO and cytokine levels, respectively; then, mRNA levels (iNOS & cytokines) were analyzed by Quantitative-PCR after 12 h. NF-κB and MAPK were assessed by immunoblotting after TGSBE treatment for 12 h, followed by LPS for 30 min. Immunofluorescence assay was also performed for NF-κB. ROS and MMP, after 12 h with TGSBE, were determined by flow cytometry. The antioxidant potential of TGSBE was analyzed by ABTS assay. The Folin-Ciocalteu method determined the total phenolic content of TGSBE. LPS concentration was 0.5 µg/mL. RESULTS: TGSBE at 200 µg/mL showed about 96.2% viability while suppressing the production of NO (88.99%), TNFα (24.38%), IL-6 (61.70%) and IL-1ß (55.12%) and gene expression by 67.88, 45.24, 65.84, and 70.48%, respectively. TGSBE decreased ROS (79.26%) and improved MMP (48.01%); it inhibited translocation of NF-κB and MAPK activation. Radical scavenging activity was 50% at 402.17 µg/mL (ascorbic acid standard: 88.8 µg/mL). Total phenolic content was 240.9 mg GAE/g. DISCUSSION AND CONCLUSION: TGSBE suppresses the inflammatory response by inhibiting the NF-κB and MAPK cascades exhibiting therapeutic potential to treat inflammatory diseases associated with increased activation of macrophages.
[Mh] Termos MeSH primário: Anti-Inflamatórios/farmacologia
Lipopolissacarídeos/farmacologia
Macrófagos/efeitos dos fármacos
Extratos Vegetais/farmacologia
Theaceae
[Mh] Termos MeSH secundário: Animais
Sobrevivência Celular/efeitos dos fármacos
Citocinas/biossíntese
Sistema de Sinalização das MAP Quinases/efeitos dos fármacos
Macrófagos/metabolismo
Camundongos
NF-kappa B/metabolismo
Óxido Nítrico/biossíntese
Caules de Planta
Células RAW 264.7
Espécies Reativas de Oxigênio/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Inflammatory Agents); 0 (Cytokines); 0 (Lipopolysaccharides); 0 (NF-kappa B); 0 (Plant Extracts); 0 (Reactive Oxygen Species); 31C4KY9ESH (Nitric Oxide)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170306
[Lr] Data última revisão:
170306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170201
[St] Status:MEDLINE
[do] DOI:10.1080/13880209.2017.1278778


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[PMID]:27930677
[Au] Autor:Han BC; Wei W; Mi XC; Ma KP
[Ad] Endereço:State Key Laboratory of Vegetation and Environmental Change, Institute of Botany Chinese Academy of Sciences (IBCAS), Beijing, China.
[Ti] Título:De Novo Sequencing and Comparative Analysis of Schima superba Seedlings to Explore the Response to Drought Stress.
[So] Source:PLoS One;11(12):e0166975, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Schima superba is an important dominant species in subtropical evergreen broadleaved forests of China, and plays a vital role in community structure and dynamics. However, the survival rate of its seedlings in the field is low, and water shortage could be a factor that limits its regeneration. In order to better understand the response of its seedlings to drought stress on a functional genomics scale, RNA-seq technology was utilized in this study to perform a large-scale transcriptome sequencing of the S. superba seedlings under drought stress. More than 320 million clean reads were generated and 72218 unique transcripts were obtained through de novo assembly. These unigenes were further annotated by blasting with different public databases and a total of 53300 unique transcripts were annotated. A total of 31586 simple sequence repeat (SSR) loci were presented. Through gene expression profiling analysis between drought treatment and control, 11038 genes were found to be significantly enriched in drought-stressed seedlings. Based on these differentially expressed genes (DEGs), Gene Ontology (GO) terms enrichment and Kyoto Encyclopedia of Genes and Genomes pathway (KEGG) enrichment analysis indicated that drought stress caused a number of changes in the types of sugars, enzymes, secondary mechanisms, and light responses, and induced some potential physical protection mechanisms. In addition, the expression patterns of 18 transcripts induced by drought, as determined by quantitative real-time PCR, were consistent with their transcript abundance changes, as identified by RNA-seq. This transcriptome study provides a rapid method for understanding the response of S. superba seedlings to drought stress and provides a number of gene sequences available for further functional genomics studies.
[Mh] Termos MeSH primário: Plântulas/fisiologia
Theaceae/genética
[Mh] Termos MeSH secundário: Desidratação/fisiopatologia
Regulação da Expressão Gênica de Plantas/genética
Regulação da Expressão Gênica de Plantas/fisiologia
Genes de Plantas/genética
Genes de Plantas/fisiologia
Repetições de Microssatélites/genética
Reação em Cadeia da Polimerase
Plântulas/genética
Análise de Sequência de DNA
Theaceae/fisiologia
Transcriptoma
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170713
[Lr] Data última revisão:
170713
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161209
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0166975


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[PMID]:27116301
[Au] Autor:Seong ZK; Kim HS; Won YM; Kim JL; Song HH; Kim DY; Oh SR; Cho HW; Cho JH; Lee HK
[Ad] Endereço:Natural Medicine Research Center, Korea Research Institute of Bioscience & Biotechnology, yeongudanji-ro 30, Ochang-eup, Cheongwon-gu, Cheongju-si, 363-883, Korea.
[Ti] Título:Phenylacylphenol derivatives with anti-melanogenic activity from Stewartia pseudocamellia.
[So] Source:Arch Pharm Res;39(5):636-45, 2016 May.
[Is] ISSN:0253-6269
[Cp] País de publicação:Korea (South)
[La] Idioma:eng
[Ab] Resumo:Three new phenylacylphenol derivatives, stewartianol (1), deoxystewartianol-4'-O-arabinoglucoside (2), and stewartianol-3-O-glucoside (3), along with nine known compounds, methylesculin (4), fraxoside (5), fraxetin (6), scopletin (7), (+)-dihydromyricetin (8), (+)-taxifolin-7-O-ß-D-glucose (9), (+)-taxifolin (10), (+)-dihydrokaempferol-7-O-ß-D-glucose (11), and 3-acetyl-ursolic acid (12), were isolated from the twigs of Stewartia pseudocamellia; commonly used as folk medicine in Korea. The structures of the isolated compounds were identified using spectroscopic analysis, including 1D, 2D NMR, MS and compared with published data. The compounds were tested for their anti-melanogenic activity in cultured murine B16 melanoma cells. Stewartianol (1) and stewartianol-3-O-glucoside (3) showed an inhibitory effect significantly on melanogenesis in a concentration-dependent manner.
[Mh] Termos MeSH primário: Glucosídeos/isolamento & purificação
Melaninas/antagonistas & inibidores
Componentes Aéreos da Planta/química
Resorcinóis/isolamento & purificação
Theaceae/química
[Mh] Termos MeSH secundário: Animais
Linhagem Celular Tumoral
Sobrevivência Celular/efeitos dos fármacos
Relação Dose-Resposta a Droga
Glucosídeos/farmacologia
Melaninas/metabolismo
Melanoma Experimental/metabolismo
Melanoma Experimental/patologia
Camundongos
Resorcinóis/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Glucosides); 0 (Melanins); 0 (Resorcinols); 0 (stewartianol); 0 (stewartianol-3-O-glucoside)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170207
[Lr] Data última revisão:
170207
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160427
[St] Status:MEDLINE
[do] DOI:10.1007/s12272-016-0717-9


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[PMID]:27011038
[Au] Autor:Wang Y; Yang Y; Wei C; Wan X; Thompson HJ
[Ad] Endereço:International Center on Tea for Human Health, A Joint Research Program, Anhui Agricultural University , Hefei, People's Republic of China.
[Ti] Título:Principles of Biomedical Agriculture Applied to the Plant Family Theaceae To Identify Novel Interventions for Cancer Prevention and Control.
[So] Source:J Agric Food Chem;64(14):2809-14, 2016 Apr 13.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Plant materials from the family Theaceae have been used for over a thousand years as integral components within the food systems of many globally distributed cultures and to treat a variety of human ailments. These markedly different uses remain of considerable interest in the 21st century. This perspective draws heavily from the agricultural and biomedical literature published using plant materials from the genus Camellia. Our objective is to provide a rationale and framework for broadening the scope of investigation of genera and species within Theaceae beyond Camellia sinensis to accelerate the development of a new generation of Theaceae-based pharmaceuticals/nutraceuticals and the more general enhancement of the food supply with Theaceae-containing products that affect the development of chronic diseases such as cancer. This will require a concerted effort to systematically capitalize on the rapidly growing knowledge of germplasm resources within Theaceae using metabolomic profiling in combination with in vivo and in vitro approaches. The successful translation of this research into products that affect human health will be facilitated by recognition of the agronomic factors that are critical in making hot water infusions generically referred to as tea as well as food products containing ground leaf powders.
[Mh] Termos MeSH primário: Neoplasias/prevenção & controle
Extratos Vegetais/administração & dosagem
Theaceae/química
[Mh] Termos MeSH secundário: Agricultura
Seres Humanos
Neoplasias/tratamento farmacológico
Extratos Vegetais/química
Folhas de Planta/química
Theaceae/classificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Plant Extracts)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160325
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.6b00719


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[PMID]:26991382
[Au] Autor:Jian Q; Boyer TH; Yang X; Xia B; Yang X
[Ad] Endereço:School of Environmental Science & Engineering, Sun Yat-sen University, Guangzhou, 510275, China.
[Ti] Título:Characteristics and DBP formation of dissolved organic matter from leachates of fresh and aged leaf litter.
[So] Source:Chemosphere;152:335-44, 2016 Jun.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Dissolved organic matter (DOM) was leached from leaves of two trees commonly grown in subtropical regions, Pinus elliottii (commonly known as slash pine) and Schima superba (S. superba), and its degradation pattern and potential for forming disinfection byproducts (DBPs) were evaluated. The leaves were exposed in the field for up to one year before leaching. The DOM leached from slash pine litter contained on average 10.4 mg of dissolved organic carbon (DOC) per gram of dry weight; for S. superba the average was 37.2 mg-DOC/g-dry weight. Ultraviolet and visible light absorbance, fluorescence, and molecular weight analysis indicated that more aromatic/humic and higher molecular weight compounds are formed as leaf litter ages. A 4-component parallel factor analysis of the fluorescence data showed that the intensity of peaks related with protein-like components decreased gradually during biodegradation, while that of peaks attributed to humic-acid-like components increased continuously. Fresh slash pine leachates formed on average 40.0 µg of trihalomethane (THM) per milligram of DOC, while S. superba leachates formed 45.6 µg. THM formation showed peak values of 55.7 µg/mg DOC for slash pine and 74.9 µg/mg DOC for S. superba after 8 months of aging. The formation of haloacetonitrile (HAN) and trichloronitromethane (TCNM) increased with increasing leaf age, while chloral hydrate (CH) formation did not show such a trend. Specific UV absorbance showed some positive correlation with DBPs, but humic-acid-like and protein-like absorbance peaks correlated with CH and TCNM yields in only some leaf samples.
[Mh] Termos MeSH primário: Hidrocarbonetos Halogenados/análise
Pinus
Folhas de Planta/química
Theaceae
[Mh] Termos MeSH secundário: Biodegradação Ambiental
Desinfecção
Substâncias Húmicas/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Humic Substances); 0 (Hydrocarbons, Halogenated)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160319
[St] Status:MEDLINE


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[PMID]:26760267
[Au] Autor:Niu J; Zhao P; Sun Z; Zhu L; Ni G; Zeng X; Zhang Z; Zhao X; Zhao P; Gao J; Hu Y; Zeng X; Ouyang L
[Ad] Endereço:Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 523, Tianhe District, Guangzhou 510650, China; Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy o
[Ti] Título:Stomatal uptake of O3 in a Schima superba plantation in subtropical China derived from sap flow measurements.
[So] Source:Sci Total Environ;545-546:465-75, 2016 Mar 01.
[Is] ISSN:1879-1026
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Canopy stomatal ozone (O3) flux (Fst,O3) in a plantation of Schima superba, an ecologically and economically important evergreen pioneer tree species in subtropical China, was quantified based on sap flow measurements during a 2-year period. Mean Fst,O3 and accumulated Fst,O3 (AFst0) were significantly higher in wet seasons from April to September (4.62 nmol m(-2) s(-1) and 35.37 mmol m(-2), respectively) than in dry seasons from October to March (3.90 nmol m(-2) s(-1) and 24.15 mmol m(-1), respectively), yet comparable between the 2 years of the experiment, being 4.23 nmol m(-2) s(-1) and 58.23 mmol m(-2) in April 2013-March 2014 and 4.29 nmol m(-2) s(-1) and 60.80 mmol m(-2) in April 2014-March 2015, respectively. At the diurnal scale, Fst,O3 generally peaked in the early to middle afternoon hours (13:00-15:00), while the maximum stomatal conductance (Gst,O3) typically occurred in the middle to late morning hours (09:00-11:00). Monthly integrated AFst0 reached the maximum in July, although accumulated O3 exposure (SUM0) was highest in October. Seasonally or yearly, the accumulated O3 doses, either exposure-based or flux-based, notably exceeded the currently adopted critical thresholds for the protection of forest trees. These results, on the one hand, demonstrated the decoupling between the stomatal uptake of O3 and its environmental exposure level; on the other hand, indicated the potential O3 risk for S. superba in the experimental site. Therefore, the present study endorses the use of sap flow measurements as a feasible tool for estimating Fst,O3, and the transition from the exposure-based toward flux-based metrics for assessing O3 risk for forest trees. Further studies are urgently needed to relate stomatal O3 uptake doses with tree growth reductions for an improved understanding of O3 effects on trees under natural conditions.
[Mh] Termos MeSH primário: Poluentes Atmosféricos/metabolismo
Monitoramento Ambiental
Ozônio/metabolismo
Theaceae/metabolismo
[Mh] Termos MeSH secundário: China
Estômatos de Plantas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Air Pollutants); 66H7ZZK23N (Ozone)
[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:160114
[St] Status:MEDLINE


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[PMID]:26785542
[Au] Autor:Hu YT; Zhao P; Niu JF; Sun ZW; Zhu LW
[Ti] Título:[Characteristics of canopy stomatal conuctance in plantations of three re-vegetation tree species and its sensitivity to environmental factors].
[So] Source:Ying Yong Sheng Tai Xue Bao;26(9):2623-31, 2015 Sep.
[Is] ISSN:1001-9332
[Cp] País de publicação:China
[La] Idioma:chi
[Ab] Resumo:In plantations of three different re-vegetation tree species (Schima superba, Acacia auriculaeformis and Eucalyptus citriodora) in southern China, the stem sap flow of individuals at different DBH classes were monitored using Granier's thermal dissipation probes. With synchronously-measured meteorological data, the canopy stomatal conductance (g(c)) was determined and the responses of g(c) to environmental variables were analyzed. We found that daytime mean g(c) in S. superba forest on average was significantly higher than those of A. auriculaeformis and E. citriodora plantations during a year (except in March). In the three plantations, g(c) was positively logarithmically correlated with photosynthetically active radiation (PAR) (P < 0.001), with a higher sensitivity of g(c) to PAR during wet season than that of dry season. By contrast, a negative logarithmical correlation between g(c) and vapor pressure deficit (VPD) was observed, with a higher sensitivity of g(c) to VPD during the wet season. Additionally, a higher partial correlation coefficient between g(c) and VPD was observed during wet season, indicating that VPD played a more important role in regulating the behavior of stomata during wet season. In general, the sensitivity of g(c) to VPD decreased with the decreases of soil water content, but more manifest decreases were found in S. superba and E. citriodora forests than in A. auriculaeformis plantation, while the descend degree in S. superba and E. citriodora forests were equal. Overall, our results demonstrated that the native species S. superba is more suitable for re-vegetation in southern China than the exotic species A. auriculaeformis and E. citriodora.
[Mh] Termos MeSH primário: Meio Ambiente
Árvores/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Acacia/crescimento & desenvolvimento
China
Eucalyptus/crescimento & desenvolvimento
Fotossíntese
Caules de Planta
Transpiração Vegetal
Estações do Ano
Solo
Theaceae/crescimento & desenvolvimento
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 059QF0KO0R (Water)
[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]:26201219
[Au] Autor:Vasfilov SP
[Ti] Título:[Influence of photosynthetic parameters on leaf longevity].
[So] Source:Zh Obshch Biol;76(3):225-43, 2015 May-Jun.
[Is] ISSN:0044-4596
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:Higher plants show a wide range of leaf lifespan (LL) variability. LL is calculated as a sum of functional LL(f) (corresponding to the time of active photosynthesis and CO2 accumulation in the leaf) and nonfunctional LL(n) (the time of photosynthetic activity absence). For evergreen species of boreal zones, LL(n) corresponds to the period of winter rest. Photosynthetic potential of leaf (PPL), interpreted as the maximum possible amount of CO2 that can be fixed during its life, can be estimated on the basis of maximum photosynthesis rate (P(a)) dynamics during LL(f); the maximum (P(a max)) being achieved in mature leaf. Photosynthetic potential depends on LL(f) more strongly than on P(a max). The PPL/LL(f) ratio is indicative of the rate of PPL realization over leaf lifespan. As LL(f) shows strong positive correlation with LL, the latter parameter can also characterize the rate of PPL realization. Long LL(f) in evergreen species provides higher PPL, which is advantageous by comparison with deciduous ones. In evergreen species, the PPL itself is realized slower than in deciduous ones. The increase in LL(f) and LL is accompanied by the increase in leaf constructional cost (LCC(a)) as well as the decrease in photosynthesis rate. At that, photosynthesis rate per unit of dry weight (P(m)) decreases much faster than that per unit of leaf area (P(a)). Apparently, when considering dry leaf weight, the apoplast share seems to be much higher in long-living leaves of evergreen species than in short-living leaves of deciduous species. The leaf payback (LP) may be stabilized by unidirectional shifts in PPL and LCC(a). Species with short/long LL(f) and high/low PPL realization rate are typical for early/late succession stages and for habitats with the environmental conditions favorable/adverse for photosynthesis and growth. If the conditions for photosynthesis and growth are favorable, high PPL realization rate provides advantage in competition. The PPL realization rate is coupled with the rate of leaf senescence.
[Mh] Termos MeSH primário: Lauraceae/fisiologia
Modelos Estatísticos
Fotossíntese/fisiologia
Folhas de Planta/fisiologia
Rosales/fisiologia
Theaceae/fisiologia
[Mh] Termos MeSH secundário: Ecossistema
Luz
Estações do Ano
Especificidade da Espécie
Fatores de Tempo
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE
[Em] Mês de entrada:1508
[Cu] Atualização por classe:150723
[Lr] Data última revisão:
150723
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150724
[St] Status:MEDLINE


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[PMID]:26117824
[Au] Autor:Wu C; Zhang RL; Li HY; Hu C; Liu BL; Li YL; Zhou GX
[Ad] Endereço:College of Pharmacy, Institute of Traditional Chinese Medicine & Natural Products, Jinan University, 601 West Huangpu Avenue, Guangzhou 510632, China; XiaMen Medical College, Xiamen 361008, China.
[Ti] Título:Triterpenoid saponins from the root bark of Schima superba and their cytotoxic activity on B16 melanoma cell line.
[So] Source:Carbohydr Res;413:107-14, 2015 Sep 02.
[Is] ISSN:1873-426X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Eight new oleanane-type triterpenoid saponins, schisusaponins A-H, along with eight known triterpenoid saponins, were isolated from the root bark of Schima superb (Theaceae). Their structures were elucidated on the basis of extensive spectroscopic analyses and chemical methods. The cytotoxicity of the new compounds against B16 melanoma cells was assessed. Among the isolated new saponins, schisusaponins C and E showed more potent effects (with IC50 values of 10.08 and 10.89 µM) than vinblastine (with an IC50 value of 19.48 µM).
[Mh] Termos MeSH primário: Melanoma Experimental/patologia
Casca de Planta/química
Saponinas/química
Saponinas/farmacologia
Theaceae/química
Triterpenos/química
[Mh] Termos MeSH secundário: Animais
Antineoplásicos Fitogênicos/química
Antineoplásicos Fitogênicos/isolamento & purificação
Antineoplásicos Fitogênicos/farmacologia
Linhagem Celular Tumoral
Ensaios de Seleção de Medicamentos Antitumorais
Concentração Inibidora 50
Camundongos
Saponinas/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antineoplastic Agents, Phytogenic); 0 (Saponins); 0 (Triterpenes)
[Em] Mês de entrada:1605
[Cu] Atualização por classe:150810
[Lr] Data última revisão:
150810
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150629
[St] Status:MEDLINE



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