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Pesquisa : B01.650.940.800.575.912.250.618.100.050.530 [Categoria DeCS]
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[PMID]:28441543
[Au] Autor:Sun S; Wei Y; Cao Y; Deng B
[Ad] Endereço:Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
[Ti] Título:Simultaneous electrochemiluminescence determination of galanthamine, homolycorine, lycorenine, and tazettine in Lycoris radiata by capillary electrophoresis with ultrasonic-assisted extraction.
[So] Source:J Chromatogr B Analyt Technol Biomed Life Sci;1055-1056:15-19, 2017 Jun 15.
[Is] ISSN:1873-376X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:After ultrasonic-assisted extraction, four lycoris radiata alkaloids: galanthamine, homolycorine, lycorenine, and tazettine were determined by capillary electrophoresis electrochemiluminescence. Polyvinylpyrrolidone was added to the running buffer (RB) to obtain better resolution. Experimental conditions influencing the determination were examined, including the additives, detection potential, separation voltage, injection voltage and time, and RB pH and concentration. Under optimal experimental conditions, the baseline separation of the four alkaloids occurred within 16min. The proposed method displayed the following linear ranges (in ng/mL): galanthamine [60-5000], homolycorine [40-5000], lycorenine [5.0-1500], and tazettine [8.0-2500]. The detection limits in ng/mL, (S/N=3), were galanthamine [14], homolycorine [11], lycorenine [1.8], and tazettine [3.1]. Intra-day and inter-day RSDs for the four alkaloids of the six replicates were less than 2.7% and 3.1%, respectively. The recoveries in% were: tazettine [102.5], lycorenine [98.20], galanthamine [97.30], and homolycorine [98.33].
[Mh] Termos MeSH primário: Alcaloides de Amaryllidaceae/análise
Eletroforese Capilar/métodos
Galantamina/análise
Medições Luminescentes/métodos
Lycoris/química
[Mh] Termos MeSH secundário: Alcaloides de Amaryllidaceae/isolamento & purificação
Tampões (Química)
Eletroforese Capilar/economia
Galantamina/isolamento & purificação
Limite de Detecção
Medições Luminescentes/economia
Extratos Vegetais/química
Povidona/química
Sonicação/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amaryllidaceae Alkaloids); 0 (Buffers); 0 (Plant Extracts); 0D3Q044KCA (Galantamine); 477-19-0 (lycorenine); 477-20-3 (homolycorine); 76WEU12CSO (tazettine); FZ989GH94E (Povidone)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170426
[St] Status:MEDLINE


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[PMID]:27911369
[Au] Autor:Yamaji F; Ohsawa TA
[Ad] Endereço:Department of Biology, Chiba University.
[Ti] Título:Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea.
[So] Source:J Vis Exp;(117), 2016 Nov 25.
[Is] ISSN:1940-087X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Plant-pollinator interactions have been studied for approximately one hundred years. During that time, many field methods have been developed to clarify the pollination effectiveness of each pollinator for visited flowers. Pollinator observations have been one of the most common methods to identify pollinators, and bagging and cage experiments have been conducted to show the effectiveness of specific pollinators. In a previous study of Lycoris sanguinea var. sanguinea, its effective pollinators, the visitation frequencies of each floral visitor, and its reproductive strategies were not identified. This study reports the observation that small bees visited flowers that were partially opened (breaking buds). To the best of our knowledge, this phenomenon has not been reported previously. Further, this study investigates the hypothesis that small bees can pollinate at that flowering stage. This study demonstrates the basic methods of field experiments in pollination ecology using L. sanguinea var. sanguinea. Pollinator observations and digital video showed the visitation frequencies of each floral visitor. Bagging and cage experiments revealed that these flowers could be pollinated fully and that breaking-bud pollination could be important for the pollination of this plant species. The advantages and disadvantages of each method are discussed, and recent developments, including laboratory experiments, are described.
[Mh] Termos MeSH primário: Lycoris
Polinização
[Mh] Termos MeSH secundário: Animais
Abelhas
Ecologia
Flores
[Pt] Tipo de publicação:JOURNAL ARTICLE; VIDEO-AUDIO MEDIA
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170911
[Lr] Data última revisão:
170911
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161203
[St] Status:MEDLINE
[do] DOI:10.3791/54728


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[PMID]:27724902
[Au] Autor:Xu S; Jiang Y; Wang N; Xia B; Jiang Y; Li X; Zhang Z; Li Y; Wang R
[Ad] Endereço:Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China.
[Ti] Título:Identification and differential regulation of microRNAs in response to methyl jasmonate treatment in Lycoris aurea by deep sequencing.
[So] Source:BMC Genomics;17(1):789, 2016 10 10.
[Is] ISSN:1471-2164
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Lycoris aurea is a medicine-valuable and ornamental herb widely distributed in China. Former studied have showed that methyl jasmonate (MJ) treatment could increase the content of glanthamine-a worldwide medicine for symptomatic treatment of Alzheimer's disease in genus Lycoris plants. To explore the possible role of miRNAs in the regulation of jasmonic acid signaling pathway and uncover their potential correlations, we investigated the expression profiles of small RNAs (sRNAs) and their targets in Lycoris aurea, with MJ treatment by using next-generation deep sequencing. RESULTS: A total of 365 miRNAs were identified, comprising 342 known miRNAs (representing 60 miRNA families) and 23 novel miRNAs. Among them, 143 known and 11 novel miRNAs were expressed differently under MJ treatment. Quantitative real-time PCR of eight selected miRNAs validated the expression pattern of these loci in response to MJ treatment. In addition, degradome sequencing analysis showed that 32 target genes were validated to be targeted by the 49 miRNAs, respectively. Gene function and pathway analyses showed that these targets such as auxin response factors (ARFs), squamosa promoter-binding like (SPL) proteins, basic helix-loop-helix (bHLH) proteins, and ubiquitin-conjugating enzyme E2 are involved in different plant processes, indicating miRNAs mediated regulation might play important roles in L. aurea response to MJ treatment. Furthermore, several L. aurea miRNAs associated with their target genes that might be involved in Amaryllidaceae alkloids biosynthehsis were also analyzed. CONCLUSIONS: A number of miRNAs with diverse expression patterns, and complex relationships between expression of miRNAs and targets were identified. This study represents the first transcriptome-based analysis of miRNAs in Lycoris and will contribute to understanding the potential roles of miRNAs involved in regulation of MJ response.
[Mh] Termos MeSH primário: Acetatos/farmacologia
Ciclopentanos/farmacologia
Regulação da Expressão Gênica de Plantas/efeitos dos fármacos
Lycoris/efeitos dos fármacos
Lycoris/genética
MicroRNAs/genética
Oxilipinas/farmacologia
Reguladores de Crescimento de Planta/farmacologia
RNA de Plantas
[Mh] Termos MeSH secundário: Análise por Conglomerados
Biologia Computacional
Evolução Molecular
Perfilação da Expressão Gênica
Sequenciamento de Nucleotídeos em Larga Escala
Reprodutibilidade dos Testes
Transcriptoma
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Acetates); 0 (Cyclopentanes); 0 (MicroRNAs); 0 (Oxylipins); 0 (Plant Growth Regulators); 0 (RNA, Plant); 900N171A0F (methyl jasmonate)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171119
[Lr] Data última revisão:
171119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161012
[St] Status:MEDLINE


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[PMID]:27388056
[Au] Autor:Yun YS; Tajima M; Takahashi S; Takahashi Y; Umemura M; Nakano H; Park HS; Inoue H
[Ad] Endereço:School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, 192-0392, Japan. yun@toyaku.ac.jp.
[Ti] Título:Two Alkaloids from Bulbs of Lycoris sanguinea M Suppress PEPCK Expression by Inhibiting the Phosphorylation of CREB.
[So] Source:Phytother Res;30(10):1689-1695, 2016 Oct.
[Is] ISSN:1099-1573
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In the fasting state, gluconeogenesis is upregulated by glucagon. Glucagon stimulates cyclic adenosine monophosphate production, which induces the expression of key enzymes for gluconeogenesis, such as cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C), which are involved in gluconeogenesis through the protein kinase A/cAMP response element-binding protein (CREB) pathway. Using a luciferase reporter gene assay, a methanol extract of the bulbs of Lycoris sanguinea M var. kiushiana Makino was found to suppress cAMP-enhanced PEPCK-C promoter activity. In addition, two alkaloids, lycoricidine and lycoricidinol, in the extract were identified as active constituents. In forskolin-stimulated human hepatoma cells, these alkaloids suppressed the expression of a reporter gene under the control of cAMP response element and also prevented increases in the endogenous levels of phosphorylated CREB and PEPCK mRNA expression. These results suggest that lycoricidine and lycoricidinol suppress PEPCK-C expression by inhibiting the phosphorylation of CREB and may thus have the potential to prevent excessive gluconeogenesis in type 2 diabetes. Copyright © 2016 John Wiley & Sons, Ltd.
[Mh] Termos MeSH primário: Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/antagonistas & inibidores
Lycoris/química
Fosfoenolpiruvato Carboxiquinase (GTP)/metabolismo
[Mh] Termos MeSH secundário: Alcaloides
Animais
Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/metabolismo
Gluconeogênese
Seres Humanos
Fosforilação
Transfecção
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Alkaloids); 0 (Cyclic AMP Response Element-Binding Protein); EC 4.1.1.32 (Phosphoenolpyruvate Carboxykinase (GTP))
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160709
[St] Status:MEDLINE
[do] DOI:10.1002/ptr.5676


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[PMID]:26985918
[Au] Autor:Liu YX; Zheng YH; Xia T; Zhou J
[Ad] Endereço:Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, College of Biology and the Environment, Nanjing Forestry University, Nanjing, China.
[Ti] Título:Karyotype studies on Lycoris radiata populations from China.
[So] Source:Genet Mol Res;15(1):15017357, 2016 Feb 26.
[Is] ISSN:1676-5680
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:Lycoris radiata is an important medicinal and ornamental plant of China. In the present study, somatic chromosome counts and karyotype analyses, which are important aspects of plant phylogeny and evolution, were performed in 466 individuals from 25 L. radiata populations by root tip squash method. Chromosome counts revealed that 10 populations were diploid (2n = 2x = 22) and 15 were triploid (2n = 3x = 33). Except for one diploid population containing some triploid plants, the remaining 24 populations showed a single cytotype. Karyotype analysis showed that the karyotypes of L. radiata varied in different populations and even within the same population. However, based on the Stebbins' system, the karyotype of all the populations could be classified in 4A classes. The cluster analysis and ordination methods demonstrated that the L. radiata populations grouped in two major clusters. Previous research has shown that the triploid strain of L. radiata is a genetically identical species. However, the cluster analysis revealed that the triploid strains clustered in two groups instead of one, which indicates that these strains may not be identical species, genetically. This study is expected to improve the understanding of the genetic diversity in L. radiata and provide a basis for future studies on species differentiation, speciation, and taxonomy.
[Mh] Termos MeSH primário: Cromossomos de Plantas/genética
Cariotipagem/métodos
Lycoris/classificação
Lycoris/genética
[Mh] Termos MeSH secundário: Análise por Conglomerados
Evolução Molecular
Variação Genética
Genética Populacional
Filogenia
Ploidias
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[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:160318
[St] Status:MEDLINE
[do] DOI:10.4238/gmr.15017357


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[PMID]:26690108
[Au] Autor:Tian Y; Zhang C; Guo M
[Ad] Endereço:Sino-Africa Joint Research Center/Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China. xiaoqiangtian2013@163.com.
[Ti] Título:Comparative Analysis of Amaryllidaceae Alkaloids from Three Lycoris Species.
[So] Source:Molecules;20(12):21854-69, 2015 Dec 07.
[Is] ISSN:1420-3049
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:The major active constituents from Amaryllidaceae family were reported to be Amaryllidaceae alkaloids (AAs), which exhibited a wide spectrum of biological activities, such as anti-tumor, anti-viral, and acetyl-cholinesterase-inhibitory activities. In order to better understand their potential as a source of bioactive AAs and the phytochemical variations among three different species of Lycoris herbs, the HPLC fingerprint profiles of Lycoris aurea (L. aurea), L. radiata, and L. guangxiensis were firstly determined and compared using LC-UV and LC-MS/MS. As a result, 39 peaks were resolved and identified as AAs, of which nine peaks were found in common for all these three species, while the other 30 peaks could be revealed as characteristic AAs for L. aurea, L. radiata and L. guangxiensis, respectively. Thus, these AAs can be used as chemical markers for the identification and quality control of these plant species. To further reveal correlations between chemical components and their pharmaceutical activities of these species at the molecular level, the bioactivities of the total AAs from the three plant species were also tested against HepG2 cells with the inhibitory rate at 78.02%, 84.91% and 66.81% for L. aurea, L. radiata and L. guangxiensis, respectively. This study firstly revealed that the three species under investigation were different not only in the types of AAs, but also in their contents, and both contributed to their pharmacological distinctions. To the best of our knowledge, the current research provides the most detailed phytochemical profiles of AAs in these species, and offers valuable information for future valuation and exploitation of these medicinal plants.
[Mh] Termos MeSH primário: Alcaloides/química
Antineoplásicos Fitogênicos/química
Lycoris/química
Extratos Vegetais/química
[Mh] Termos MeSH secundário: Alcaloides/isolamento & purificação
Alcaloides/farmacologia
Antineoplásicos Fitogênicos/isolamento & purificação
Antineoplásicos Fitogênicos/farmacologia
Cromatografia Líquida de Alta Pressão
Ensaios de Seleção de Medicamentos Antitumorais
Células Hep G2
Seres Humanos
Concentração Inibidora 50
Extratos Vegetais/isolamento & purificação
Extratos Vegetais/farmacologia
Espectrometria de Massas em Tandem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Alkaloids); 0 (Antineoplastic Agents, Phytogenic); 0 (Plant Extracts)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151222
[Lr] Data última revisão:
151222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151223
[St] Status:MEDLINE
[do] DOI:10.3390/molecules201219806


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[PMID]:26423865
[Au] Autor:Yokosuka A
[Ad] Endereço:Department of Medicinal Pharmacognosy, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences.
[Ti] Título:[Discovery of Novel Biologically Active Compounds of Natural Origin, with a Focus on Anti-tumor Activity].
[So] Source:Yakugaku Zasshi;135(10):1109-14, 2015.
[Is] ISSN:1347-5231
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo:Numerous clinically valuable medicines, including anticancer drugs, have been developed from biologically active natural compounds and their structurally related derivatives. This review discusses novel natural compounds with promising biological activities and those with novel chemical structures. Glaziovianin A, an isoflavone isolated from the leaves of Ateleia glazioviana (Legminosae), inhibited cell cycle progression at the M-phase with an abnormal spindle structure. AU-1 and YG-1, 5ß-steroidal glycosides isolated from the whole plants of Agave utahensis and the underground parts of Yucca glauca (Agavaceae), induced apoptosis of HL-60 cells via caspase-3 activation. Lycolicidinol, an alkaloid isolated from the bulbs of Lycoris albiflora (Amaryllidaceae), induced transient autophagy and morphological changes in mitochondria in the early stage of the apoptotic cell death process in HSC-2 cells. Taccasterosides isolated from the rhizomes of Tacca chantrieri (Taccaceae) and stryphnosides isolated from the pericarps of Stryphnodendron fissuratum (Legminosae) are steroidal and triterpene glycosides with unique chemical structures having novel sugar sequences.
[Mh] Termos MeSH primário: Agave/química
Alcaloides/isolamento & purificação
Alcaloides/farmacologia
Antineoplásicos
Descoberta de Drogas
Fabaceae/química
Glicosídeos/isolamento & purificação
Glicosídeos/farmacologia
Isoflavonas/isolamento & purificação
Isoflavonas/farmacologia
Lycoris/química
Yucca/química
[Mh] Termos MeSH secundário: Ampicilina/análogos & derivados
Ampicilina/química
Ampicilina/isolamento & purificação
Ampicilina/farmacologia
Animais
Apoptose/efeitos dos fármacos
Autofagia/efeitos dos fármacos
Caspase 3/metabolismo
Ciclo Celular/efeitos dos fármacos
Divisão Celular/efeitos dos fármacos
Dioscoreaceae/química
Glicosídeos/química
Células HL-60
Seres Humanos
Isoflavonas/química
Mitocôndrias/efeitos dos fármacos
Conformação Molecular
Fitoterapia
Folhas de Planta
Ratos
Fuso Acromático/efeitos dos fármacos
Relação Estrutura-Atividade
Triterpenos/isolamento & purificação
Triterpenos/farmacologia
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Alkaloids); 0 (Antineoplastic Agents); 0 (Glycosides); 0 (Isoflavones); 0 (N-(6,7-difluoroquinolonyl)ampicillin); 0 (Triterpenes); 0 (glaziovianin A); 7C782967RD (Ampicillin); EC 3.4.22.- (Caspase 3)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151001
[Lr] Data última revisão:
151001
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151002
[St] Status:MEDLINE
[do] DOI:10.1248/yakushi.15-00185


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[PMID]:26252827
[Au] Autor:Ang S; Liu XM; Huang XJ; Zhang DM; Zhang W; Wang L; Ye WC
[Ad] Endereço:Institute of Traditional Chinese Medicine and Natural Products, Jinan University, Guangzhou, PR China.
[Ti] Título:Four New Amaryllidaceae Alkaloids from Lycoris radiata and Their Cytotoxicity.
[So] Source:Planta Med;81(18):1712-8, 2015 Dec.
[Is] ISSN:1439-0221
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Four new Amaryllidaceae alkaloids, named lycoranines C-F (1-4), together with seven known ones (5-11) were isolated from the bulbs of Lycoris radiata. Their structures with absolute configurations were elucidated by nuclear magnetic resonance, high-resolution electrospray ionization mass spectrometry, circular dichroism spectra, modified Mosher's method, and molecular modeling calculation. Compounds 6, 7, 10, and 11 exhibited a potent inhibitory effect on A549 and LoVo cells with IC50 values ranging from 3.97 ± 0.36 to 17.37 ± 1.57 µM.
[Mh] Termos MeSH primário: Alcaloides de Amaryllidaceae/isolamento & purificação
Antineoplásicos Fitogênicos/isolamento & purificação
Lycoris/química
[Mh] Termos MeSH secundário: Alcaloides de Amaryllidaceae/química
Alcaloides de Amaryllidaceae/farmacologia
Animais
Antineoplásicos Fitogênicos/química
Antineoplásicos Fitogênicos/farmacologia
Linhagem Celular Tumoral
China
Ensaios de Seleção de Medicamentos Antitumorais
Medicamentos de Ervas Chinesas/química
Espectroscopia de Ressonância Magnética
Estrutura Molecular
Raízes de Plantas/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Amaryllidaceae Alkaloids); 0 (Antineoplastic Agents, Phytogenic); 0 (Drugs, Chinese Herbal); 0 (lycoranine C)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151223
[Lr] Data última revisão:
151223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150808
[St] Status:MEDLINE
[do] DOI:10.1055/s-0035-1557743


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[PMID]:26218758
[Au] Autor:Kim J; Park Y; Chun YS; Cha JW; Kwon HC; Oh MS; Chung S; Yang HO
[Ad] Endereço:†Natural Products Research Center, Korea Institute of Science and Technology, 290 Daejeon-dong, Gangneung, Gangwon-do 210-340, Republic of Korea.
[Ti] Título:Effect of Lycoris chejuensis and Its Active Components on Experimental Models of Alzheimer's Disease.
[So] Source:J Agric Food Chem;63(31):6979-88, 2015 Aug 12.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We found that an extract of Lycoris chejuensis and its three isolated active components, narciclasine, 7-deoxynarciclasine, and 7-deoxy-trans-dihydronarciclasine, each significantly reduced the formation of amyloid-ß peptides in HeLa cells transfected with an amyloid precursor protein carrying the Swedish mutation up to 45 ± 3.6%. The extract down-regulated amyloid precursor protein, especially the mature form by up to 88%, and reduced the ability of secretases to generate toxic amyloid-ß. Double-transgenic mice treated with the extract for 4 months also showed significantly reduced levels of amyloid-ß and plaques while exhibiting improved memory functions in the Morris water maze and novel object recognition tests. In conclusion, the extract and isolated active components of L. chejuensis decreased the production of amyloid-ß by attenuating amyloid precursor protein levels. Furthermore, the extract improved the disrupted memory functions in animals while inhibiting amyloid plaque formation. Thus, this extract, as well as its active components, could prove beneficial in the treatment of Alzheimer's disease.
[Mh] Termos MeSH primário: Doença de Alzheimer/tratamento farmacológico
Lycoris/química
Extratos Vegetais/administração & dosagem
[Mh] Termos MeSH secundário: Doença de Alzheimer/genética
Doença de Alzheimer/metabolismo
Doença de Alzheimer/psicologia
Peptídeos beta-Amiloides/genética
Peptídeos beta-Amiloides/metabolismo
Animais
Modelos Animais de Doenças
Seres Humanos
Masculino
Memória/efeitos dos fármacos
Camundongos
Camundongos Transgênicos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Amyloid beta-Peptides); 0 (Plant Extracts)
[Em] Mês de entrada:1603
[Cu] Atualização por classe:150812
[Lr] Data última revisão:
150812
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150729
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.5b00889


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[PMID]:26175010
[Au] Autor:Yamaji F; Ohsawa TA
[Ad] Endereço:Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan, futa.yamaji@gmail.com.
[Ti] Título:Breaking-bud pollination: a new pollination process in partially opened flowers by small bees.
[So] Source:J Plant Res;128(5):803-11, 2015 Sep.
[Is] ISSN:1618-0860
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Plant-pollinator interactions have usually been researched in flowers that have fully opened. However, some pollinators can visit flowers before full opening and contribute to fruit and seed sets. In this paper, we researched the pollination biology of flowers just starting to open in four field experiments. We observed the insect visitors to Lycoris sanguinea var. sanguinea for 3 years at five sites. These observations revealed that only small bees, Lasioglossum japonicum, often entered through tiny spaces between the tepals of 'breaking buds' (i.e. partially opened flowers) and collected pollen. We hypothesized that they can pollinate this species at the breaking-bud stage, when the stigma is located near the anthers. To measure the pollination effect of small bees at the breaking-bud stage, we bagged several breaking buds after small bees had visited them and examined whether these buds were pollinated. In bagging experiments, 30% of the breaking buds set fruit and seeds. Fruit-set ratios of the breaking buds did not differ significantly from those of the fully opened flowers, which had been visited by several insect species. We also counted the pollen grain numbers on the body of L. japonicum and on the anthers of randomly-selected and manipulated flowers. These experiments revealed that all of the captured bees had some pollen of target plants and that L. japonicum collected most of the pollen grains at the breaking-bud stage. Our results showed that the new pollination process, breaking-bud pollination, happened in breaking buds by L. japonicum, although there is no evidence to reveal that this is the most effective pollination method for L. sanguinea var. sanguinea. In principle, this new pollination process can occur in other flowering plants and our results are a major contribution to studies of plant-pollinator interactions.
[Mh] Termos MeSH primário: Abelhas/fisiologia
Lycoris/fisiologia
Polinização
[Mh] Termos MeSH secundário: Animais
Comportamento Apetitivo
Japão
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1606
[Cu] Atualização por classe:171014
[Lr] Data última revisão:
171014
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150716
[St] Status:MEDLINE
[do] DOI:10.1007/s10265-015-0741-8



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