Base de dados : MEDLINE
Pesquisa : A11.497.248 [Categoria DeCS]
Referências encontradas : 410 [refinar]
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  1 / 410 MEDLINE  
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[PMID]:28463050
[Au] Autor:Bai SN
[Ad] Endereço:a State Key Laboratory of Protein and Plant Gene Research , College of Life Science, Quantitative Biology Center, Peking University , Beijing , China.
[Ti] Título:Two types of germ cells, the sexual reproduction cycle, and the double-ring mode of plant developmental program.
[So] Source:Plant Signal Behav;12(7):e1320632, 2017 Jul 03.
[Is] ISSN:1559-2324
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this viewpoint, the usages of terms for progenitor cells to meiosis and gametogenesis are discussed. Terms for 2 types of germ cells, i.e. "diploid germ cells" and "haploid germ cells" were suggested to replace "archesporial cells" and "generative cells," respectively, in plant developmental research. This suggestion was based on 2 newly proposed concepts, the "sexual reproduction cycle" for eukaryotes, and a "double-ring mode" of plant developmental program.
[Mh] Termos MeSH primário: Células Germinativas Vegetais
Desenvolvimento Vegetal
[Mh] Termos MeSH secundário: Diploide
Haploidia
Reprodução
Terminologia como Assunto
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180306
[Lr] Data última revisão:
180306
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1080/15592324.2017.1320632


  2 / 410 MEDLINE  
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[PMID]:28424206
[Au] Autor:Bippus AC; Stockey RA; Rothwell GW; Tomescu AMF
[Ad] Endereço:Department of Biological Sciences, Humboldt State University, Arcata, California 95521 USA acb613@humboldt.edu mihai@humboldt.edu.
[Ti] Título:Extending the fossil record of Polytrichaceae: Early Cretaceous gen. et sp. nov., permineralized gametophytes with gemma cups from Vancouver Island.
[So] Source:Am J Bot;104(4):584-597, 2017 Apr.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: Diverse in modern ecosystems, mosses are dramatically underrepresented in the fossil record. Furthermore, most pre-Cenozoic mosses are known only from compression fossils, lacking detailed anatomical information. When preserved, anatomy vastly improves resolution in the systematic placement of fossils. Lower Cretaceous deposits at Apple Bay (Vancouver Island, British Columbia, Canada) contain a diverse anatomically preserved flora that includes numerous bryophytes, many of which have yet to be characterized. Among them is a polytrichaceous moss that is described here. METHODS: Fossil moss gametophytes preserved in four carbonate concretions were studied in serial sections prepared using the cellulose acetate peel technique. KEY RESULTS: We describe gen. et sp. nov., a polytrichaceous moss with terminal gemma cups containing stalked, lenticular gemmae. Leaves with characteristic costal anatomy, differentiated into sheathing base and free lamina and bearing photosynthetic lamellae, along with a conducting strand in the stem, place in family Polytrichaceae. The bistratose leaf lamina with an adaxial layer of mamillose cells, short photosynthetic lamellae restricted to the costa, and presence of gemma cups indicate affinities with basal members of the Polytrichaceae, such as , , and . CONCLUSIONS: enriches the documented moss diversity of an already-diverse Early Cretaceous plant fossil assemblage. This is the third moss described from the Apple Bay plant fossil assemblage and represents the first occurrence of gemma cups in a fossil moss. It is also the oldest unequivocal record of Polytrichaceae, providing a hard minimum age for the group of 136 million years.
[Mh] Termos MeSH primário: Briófitas/anatomia & histologia
Fósseis/anatomia & histologia
Células Germinativas Vegetais/ultraestrutura
[Mh] Termos MeSH secundário: Colúmbia Britânica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170822
[Lr] Data última revisão:
170822
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170421
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1700002


  3 / 410 MEDLINE  
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[PMID]:28400414
[Au] Autor:Chambers SM; Watkins JE; Sessa EB
[Ad] Endereço:University of Florida, Department of Biology, Gainesville, Florida, USA smstev2@ufl.edu.
[Ti] Título:Differences in dehydration tolerance among populations of a gametophyte-only fern.
[So] Source:Am J Bot;104(4):598-607, 2017 Apr.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:PREMISE OF THE STUDY: For many plant species, historical climatic conditions may have left lasting imprints that are detectable in contemporary populations. Additionally, if these historical conditions also prevented gene flow among populations, these populations may be differentiated with respect to one another and their contemporary environmental conditions. For the fern, , one theory is that historical conditions during the Pleistocene largely shaped both the distribution and lack of sporophyte production. Our goals-based on this theory-were to examine physiological differences among and within populations spanning the species' geographic range, and the contribution of historical climatic conditions to this differentiation. METHODS: We exposed explants from five populations to four drying treatments and examined differences in physiological response. Additionally, we examined the role of historical and current climatic conditions in driving the observed population differentiation. KEY RESULTS: Populations differ in their ability to tolerate varying levels of dehydration, displaying a pattern of countergradient selection. Exposure to historical and contemporary climatic conditions, specifically variation in temperature and precipitation regimes, resulted in population divergence observed among contemporary populations. CONCLUSIONS: Historical conditions have shaped not only the distribution of , but also its current physiological limitations. Results from this study support the hypothesis that climatic conditions during the Pleistocene are responsible for the distribution of this species, and may be responsible for the observed differences in dehydration tolerance. Additionally, dehydration tolerance may be the driving factor for previously reported patterns of countergradient selection in this species.
[Mh] Termos MeSH primário: Pteridaceae/fisiologia
[Mh] Termos MeSH secundário: Desidratação/fisiopatologia
Células Germinativas Vegetais/fisiologia
Reprodução/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170822
[Lr] Data última revisão:
170822
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170413
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1600279


  4 / 410 MEDLINE  
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[PMID]:28209842
[Au] Autor:Zhao F; Zheng YF; Zeng T; Sun R; Yang JY; Li Y; Ren DT; Ma H; Xu ZH; Bai SN
[Ad] Endereço:State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China (F.Z., Y.-F.Z., T.Z., R.S., J.-Y.Y., Z.-H.X., S.-N.B.).
[Ti] Título:Phosphorylation of SPOROCYTELESS/NOZZLE by the MPK3/6 Kinase Is Required for Anther Development.
[So] Source:Plant Physiol;173(4):2265-2277, 2017 Apr.
[Is] ISSN:1532-2548
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Germ cells are indispensable carriers of genetic information from one generation to the next. In contrast to the well-understood process in animals, information on the mechanism of germ cell initiation in plants is very limited. / was previously identified as an essential regulator of diploid germ cell (archesporial cell) differentiation in the stamens and ovules of Arabidopsis ( ). Although ( ) transcription is activated by the floral organ identity regulator AGAMOUS and epigenetically regulated by SET DOMAIN GROUP2, little is known about the regulation of the SPL protein. Here, we report that the protein kinases MPK3 and MPK6 can both interact with SPL in vitro and in vivo and can phosphorylate the SPL protein in vitro. In addition, phosphorylation of the SPL protein by MPK3/6 is required for SPL function in the Arabidopsis anther, as measured by its effect on archesporial cell differentiation. We further demonstrate that phosphorylation enhances SPL protein stability. This work not only uncovers the importance of SPL phosphorylation for its regulatory role in Arabidopsis anther development, but also supports the hypothesis that the regulation of precise spatiotemporal patterning of germ cell initiation and that differentiation is achieved progressively through multiple levels of regulation, including transcriptional and posttranslational modification.
[Mh] Termos MeSH primário: Proteínas de Arabidopsis/metabolismo
Flores/metabolismo
Quinases de Proteína Quinase Ativadas por Mitógeno/metabolismo
Proteínas Quinases Ativadas por Mitógeno/metabolismo
Proteínas Nucleares/metabolismo
Proteínas Repressoras/metabolismo
[Mh] Termos MeSH secundário: Arabidopsis/genética
Arabidopsis/crescimento & desenvolvimento
Arabidopsis/metabolismo
Proteínas de Arabidopsis/genética
Diferenciação Celular/genética
Flores/genética
Flores/crescimento & desenvolvimento
Regulação da Expressão Gênica no Desenvolvimento
Regulação da Expressão Gênica de Plantas
Células Germinativas Vegetais/citologia
Células Germinativas Vegetais/metabolismo
Imuno-Histoquímica
Microscopia de Fluorescência
Quinases de Proteína Quinase Ativadas por Mitógeno/genética
Proteínas Quinases Ativadas por Mitógeno/genética
Mutação
Proteínas Nucleares/genética
Fosforilação
Plantas Geneticamente Modificadas
Ligação Proteica
Estabilidade Proteica
Proteínas Repressoras/genética
Reação em Cadeia da Polimerase Via Transcriptase Reversa
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (Nuclear Proteins); 0 (Repressor Proteins); 0 (SPL protein, Arabidopsis); EC 2.7.11.24 (AtMPK3 protein, Arabidopsis); EC 2.7.11.24 (MPK6 protein, Arabidopsis); EC 2.7.11.24 (Mitogen-Activated Protein Kinases); EC 2.7.12.2 (Mitogen-Activated Protein Kinase Kinases)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170218
[St] Status:MEDLINE
[do] DOI:10.1104/pp.16.01765


  5 / 410 MEDLINE  
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[PMID]:28038977
[Au] Autor:Cui C; Li Y; Liu Y; Li X; Luo S; Zhang Z; Wu R; Liang G; Sun J; Peng J; Tian P
[Ad] Endereço:National Engineering Science Research & Development Center of Algae and Sea Cucumbers of China, Provincial Key Laboratory of Genetic Improvement & Efficient Culture of Marine Algae of Shandong, Shandong Oriental Ocean Sci-tech Co. Ltd., 264003 Yantai, Shandong, PR China. Electronic address:
[Ti] Título:Determination of genetic diversity among Saccharina germplasm using ISSR and RAPD markers.
[So] Source:C R Biol;340(2):76-86, 2017 Feb.
[Is] ISSN:1768-3238
[Cp] País de publicação:France
[La] Idioma:eng
[Ab] Resumo:Various species of genus Saccharina are economically important brown macroalgae cultivated in China. The genetic background of the conserved Saccharina germplasm was not clear. In this report, DNA-based molecular markers such as inter simple sequence repeats (ISSR) and random amplified polymorphic DNA (RAPD) were used to assess the genetic diversity and phylogenetic relationships among 48 Saccharina germplasms. A total of 50 ISSR and 50 RAPD primers were tested, of which only 33 polymorphic primers (17 ISSR and 16 RAPD) had an amplified clear and reproducible profile, and could be used. Seventeen ISSR primers yielded a total of 262 bands, of which 256 were polymorphic, and 15.06 polymorphic bands per primer were amplified from 48 kelp gametophytes. Sixteen RAPD primers produced 355 bands, of which 352 were polymorphic, and 22 polymorphic bands per primer were observed across 48 individuals. The simple matching coefficient of ISSR, RAPD and pooled ISSR and RAPD dendrograms ranged from 0.568 to 0.885, 0.670 to 0.873, and 0.667 to 0.862, revealing high genetic diversity. Based on the unweighted pair group method with the arithmetic averaging algorithm (UPGMA) cluster analysis and the principal components analysis (PCA) of ISSR data, the 48 gametophytes were divided into three main groups. The Mantel test revealed a similar polymorphism distribution pattern between ISSR and RAPD markers, the correlation coefficient r was 0.62, and the results indicated that both ISSR and RAPD markers were effective to assess the selected gametophytes, while matrix correlation of the ISSR marker system (r=0.78) was better than that of the RAPD marker system (r=0.64). Genetic analysis data from this study were helpful in understanding the genetic relationships among the selected 17 kelp varieties (or lines) and provided guidance for molecular-assisted selection for parental gametophytes of hybrid kelp breeding.
[Mh] Termos MeSH primário: Variação Genética/genética
Kelp/genética
Repetições de Microssatélites/genética
Técnica de Amplificação ao Acaso de DNA Polimórfico/métodos
[Mh] Termos MeSH secundário: Algoritmos
DNA de Algas/genética
Marcadores Genéticos
Células Germinativas Vegetais
Filogenia
Polimorfismo Genético/genética
Análise de Componente Principal
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Algal); 0 (Genetic Markers)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170314
[Lr] Data última revisão:
170314
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170101
[St] Status:MEDLINE


  6 / 410 MEDLINE  
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[PMID]:28012123
[Au] Autor:Kuo LY; Chen CW; Shinohara W; Ebihara A; Kudoh H; Sato H; Huang YM; Chiou WL
[Ad] Endereço:Institute of Ecology and Evolutionary Biology, National Taiwan University, Taipei, 10617, Taiwan, Republic of China.
[Ti] Título:Not only in the temperate zone: independent gametophytes of two vittarioid ferns (Pteridaceae, Polypodiales) in East Asian subtropics.
[So] Source:J Plant Res;130(2):255-262, 2017 Mar.
[Is] ISSN:1618-0860
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Independent gametophyte ferns are unique among vascular plants because they are sporophyteless and reproduce asexually to maintain their populations in the gametophyte generation. Such ferns had been primarily discovered in temperate zone, and usually hypothesized with (sub)tropical origins and subsequent extinction of sporophyte due to climate change during glaciations. Presumably, independent fern gametophytes are unlikely to be distributed in tropics and subtropics because of relatively stable climates which are less affected by glaciations. Nonetheless, the current study presents cases of two independent gametophyte fern species in subtropic East Asia. In this study, we applied plastid DNA sequences (trnL-L-F and matK + ndhF + chlL datasets) and comprehensive sampling (~80%) of congeneric species for molecular identification and divergence time estimation of these independent fern gametophytes. The two independent gametophyte ferns were found belonging to genus Haplopteris (vittarioids, Pteridaceae) and no genetic identical sporophyte species in East Asia. For one species, divergence times between its populations imply recent oversea dispersal(s) by spores occurred during Pleistocene. By examining their ex situ and in situ fertility, prezygotic sterility was found in these two Haplopteris, in which gametangia were not or very seldom observed, and this prezygotic sterility might attribute to their lacks of functional sporophytes. Our field observation and survey on their habitats suggest microhabitat conditions might attribute to this prezygotic sterility. These findings point to consideration of whether recent climate change during the Pleistocene glaciation resulted in ecophysiological maladaptation of non-temperate independent gametophyte ferns. In addition, we provided a new definition to classify fern gametophyte independences at the population level. We expect that continued investigations into tropical and subtropical fern gametophyte floras will further illustrate the biogeographic significance of non-temperate fern gametophyte independence.
[Mh] Termos MeSH primário: DNA de Plantas/genética
Plastídeos/genética
Pteridaceae/fisiologia
[Mh] Termos MeSH secundário: DNA de Plantas/metabolismo
Células Germinativas Vegetais/fisiologia
Japão
Plastídeos/metabolismo
Pteridaceae/genética
Análise de Sequência de DNA
Taiwan
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Plant)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171014
[Lr] Data última revisão:
171014
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161225
[St] Status:MEDLINE
[do] DOI:10.1007/s10265-016-0897-x


  7 / 410 MEDLINE  
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[PMID]:27995374
[Au] Autor:Ohnishi Y; Okamoto T
[Ad] Endereço:Department of Biological Sciences, Tokyo Metropolitan University, Minami-osawa 1-1, Hachioji, Tokyo, 192-0397, Japan. oonishi-yukinosuke@ed.tmu.ac.jp.
[Ti] Título:Nuclear migration during karyogamy in rice zygotes is mediated by continuous convergence of actin meshwork toward the egg nucleus.
[So] Source:J Plant Res;130(2):339-348, 2017 Mar.
[Is] ISSN:1618-0860
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Fertilization is comprised of two sequential fusion processes; plasmogamy and karyogamy. Karyogamy completes with migration and fusion of the male and female nuclei in the fused cell. In animals, microtubules organized by the centrosome control female/male pronuclei migration. In contrast, the nuclear migration in fused gametes of angiosperms is controlled by actin filaments, but the mechanism that regulates actin filament-dependent nuclear migration is not clear. In this study, we prepared fused rice (Oryza sativa L.) gametes/zygotes using in vitro fertilization and observed the spatial and temporal movements of actin filaments and sperm nuclei. Our results show that actin filaments in egg cells form a meshwork structure surrounding the nuclei. Quantitative analysis of the actin meshwork dynamics suggests that actin meshwork converges toward the egg nucleus. In egg cells fused with sperm cells, actin filaments appeared to interact with a portion of the sperm nuclear membrane. The velocity of the actin filaments was positively correlated with the velocity of the sperm nucleus during karyogamy. These results suggest that sperm nuclear membrane and actin filaments physically interact with each other during karyogamy, and that the sperm nucleus migrates toward the egg nucleus through the convergence of the actin meshwork. Interestingly, actin filament velocity increased promptly after gamete fusion and was further elevated during nuclear fusion. In addition to the migration of gamete nuclei, convergence of actin meshwork may also be critical during early zygotic developments.
[Mh] Termos MeSH primário: Citoesqueleto de Actina/metabolismo
Actinas/metabolismo
Oryza/embriologia
Proteínas de Plantas/metabolismo
[Mh] Termos MeSH secundário: Células Germinativas Vegetais/crescimento & desenvolvimento
Sementes/embriologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Actins); 0 (Plant Proteins)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171014
[Lr] Data última revisão:
171014
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161221
[St] Status:MEDLINE
[do] DOI:10.1007/s10265-016-0892-2


  8 / 410 MEDLINE  
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[PMID]:27920160
[Au] Autor:Resentini F; Cyprys P; Steffen JG; Alter S; Morandini P; Mizzotti C; Lloyd A; Drews GN; Dresselhaus T; Colombo L; Sprunck S; Masiero S
[Ad] Endereço:Dipartimento di Bioscienze, Università degli Studi di Milano, 20133 Milan, Italy (F.R., P.M., C.M., L.C., S.M.).
[Ti] Título:SUPPRESSOR OF FRIGIDA (SUF4) Supports Gamete Fusion via Regulating Arabidopsis EC1 Gene Expression.
[So] Source:Plant Physiol;173(1):155-166, 2017 Jan.
[Is] ISSN:1532-2548
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The EGG CELL1 (EC1) gene family of Arabidopsis (Arabidopsis thaliana) comprises five members that are specifically expressed in the egg cell and redundantly control gamete fusion during double fertilization. We investigated the activity of all five EC1 promoters in promoter-deletion studies and identified SUF4 (SUPPRESSOR OF FRIGIDA4), a C H transcription factor, as a direct regulator of the EC1 gene expression. In particular, we demonstrated that SUF4 binds to all five Arabidopsis EC1 promoters, thus regulating their expression. The down-regulation of SUF4 in homozygous suf4-1 ovules results in reduced EC1 expression and delayed sperm fusion, which can be rescued by expressing SUF4-ß-glucuronidase under the control of the SUF4 promoter. To identify more gene products able to regulate EC1 expression together with SUF4, we performed coexpression studies that led to the identification of MOM1 (MORPHEUS' MOLECULE1), a component of a silencing mechanism that is independent of DNA methylation marks. In mom1-3 ovules, both SUF4 and EC1 genes are down-regulated, and EC1 genes show higher levels of histone 3 lysine-9 acetylation, suggesting that MOM1 contributes to the regulation of SUF4 and EC1 gene expression.
[Mh] Termos MeSH primário: Proteínas de Arabidopsis/genética
Arabidopsis/genética
Fertilização/genética
Regulação da Expressão Gênica de Plantas
Células Germinativas Vegetais/citologia
Células Germinativas Vegetais/metabolismo
Transativadores/metabolismo
[Mh] Termos MeSH secundário: Proteínas de Arabidopsis/metabolismo
Sequência Conservada/genética
Genes de Plantas
Genes Reporter
Proteínas de Fluorescência Verde/metabolismo
Motivos de Nucleotídeos/genética
Óvulo/citologia
Óvulo/metabolismo
Fenótipo
Regiões Promotoras Genéticas
Transcrição Genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (SUF4 protein, Arabidopsis); 0 (Trans-Activators); 147336-22-9 (Green Fluorescent Proteins)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161207
[St] Status:MEDLINE
[do] DOI:10.1104/pp.16.01024


  9 / 410 MEDLINE  
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[PMID]:27645140
[Au] Autor:Goga M; Antreich SJ; Backor M; Weckwerth W; Lang I
[Ad] Endereço:Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria. michal.goga@univie.ac.at.
[Ti] Título:Lichen secondary metabolites affect growth of Physcomitrella patens by allelopathy.
[So] Source:Protoplasma;254(3):1307-1315, 2017 May.
[Is] ISSN:1615-6102
[Cp] País de publicação:Austria
[La] Idioma:eng
[Ab] Resumo:Lichen secondary metabolites can function as allelochemicals and affect the development and growth of neighboring bryophytes, fungi, vascular plants, microorganisms, and even other lichens. Lichen overgrowth on bryophytes is frequently observed in nature even though mosses grow faster than lichens, but there is still little information on the interactions between lichens and bryophytes.In the present study, we used extracts from six lichen thalli containing secondary metabolites like usnic acid, protocetraric acid, atranorin, lecanoric acid, nortistic acid, and thamnolic acid. To observe the influence of these metabolites on bryophytes, the moss Physcomitrella patens was cultivated for 5 weeks under laboratory conditions and treated with lichen extracts. Toxicity of natural mixtures of secondary metabolites was tested at three selected doses (0.001, 0.01, and 0.1 %). When the mixture contained substantial amounts of usnic acid, we observed growth inhibition of protonemata and reduced development of gametophores. Significant differences in cell lengths and widths were also noticed. Furthermore, usnic acid had a strong effect on cell division in protonemata suggesting a strong impact on the early stages of bryophyte development by allelochemicals contained in the lichen secondary metabolites.Biological activities of lichen secondary metabolites were confirmed in several studies such as antiviral, antibacterial, antitumor, antiherbivore, antioxidant, antipyretic, and analgetic action or photoprotection. This work aimed to expand the knowledge on allelopathic effects on bryophyte growth.
[Mh] Termos MeSH primário: Benzofuranos/farmacologia
Bryopsida/crescimento & desenvolvimento
Divisão Celular/efeitos dos fármacos
Compostos Heterocíclicos com 3 Anéis/farmacologia
Hidroxibenzoatos/farmacologia
Líquens/química
Salicilatos/farmacologia
Metabolismo Secundário/fisiologia
[Mh] Termos MeSH secundário: Alelopatia
Bryopsida/metabolismo
Tamanho Celular/efeitos dos fármacos
Células Germinativas Vegetais/efeitos dos fármacos
Extratos Vegetais/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Benzofurans); 0 (Heterocyclic Compounds, 3-Ring); 0 (Hydroxybenzoates); 0 (Plant Extracts); 0 (Salicylates); 0 (protocetraric acid); 0W584PFJ77 (usnic acid); 450U2VJ2VG (atranorin); 480-56-8 (lecanoric acid)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160921
[St] Status:MEDLINE
[do] DOI:10.1007/s00709-016-1022-7


  10 / 410 MEDLINE  
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[PMID]:27706257
[Au] Autor:Imai R; Tsuda Y; Matsumoto S; Ebihara A; Watano Y
[Ad] Endereço:Department of Biology, Graduate School of Science, Chiba University, Yayoi, Inage, Chiba, Japan.
[Ti] Título:The Relationship between Mating System and Genetic Diversity in Diploid Sexual Populations of Cyrtomium falcatum in Japan.
[So] Source:PLoS One;11(10):e0163683, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The impact of variation in mating system on genetic diversity is a well-debated topic in evolutionary biology. The diploid sexual race of Cyrtomium falcatum (Japanese holly fern) shows mating system variation, i.e., it displays two different types of sexual expression (gametangia formation) in gametophytes: mixed (M) type and separate (S) type. We examined whether there is variation in the selfing rate among populations of this species, and evaluated the relationship between mating system, genetic diversity and effective population size using microsatellites. In this study, we developed eight new microsatellite markers and evaluated genetic diversity and structure of seven populations (four M-type and three S-type). Past effective population sizes (Ne) were inferred using Approximate Bayesian computation (ABC). The values of fixation index (FIS), allelic richness (AR) and gene diversity (h) differed significantly between the M-type (FIS: 0.626, AR: 1.999, h: 0.152) and the S-type (FIS: 0.208, AR: 2.718, h: 0.367) populations (when admixed individuals were removed from two populations). Although evidence of past bottleneck events was detected in all populations by ABC, the current Ne of the M-type populations was about a third of that of the S-type populations. These results suggest that the M-type populations have experienced more frequent bottlenecks, which could be related to their higher colonization ability via gametophytic selfing. Although high population differentiation among populations was detected (FST = 0.581, F'ST = 0.739), there was no clear genetic differentiation between the M- and S-types. Instead, significant isolation by distance was detected among all populations. These results suggest that mating system variation in this species is generated by the selection for single spore colonization during local extinction and recolonization events and there is no genetic structure due to mating system.
[Mh] Termos MeSH primário: Dryopteridaceae/fisiologia
Variação Genética
Células Germinativas Vegetais/fisiologia
Repetições de Microssatélites
[Mh] Termos MeSH secundário: Teorema de Bayes
DNA de Plantas/análise
Diploide
Japão
Densidade Demográfica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Plant)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170616
[Lr] Data última revisão:
170616
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161006
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0163683



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