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Pesquisa : D12.776.765.342 [Categoria DeCS]
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[PMID]:28234896
[Au] Autor:Deng L; Li L; Zhang S; Shen J; Li S; Hu S; Peng Q; Xiao J; Wu C
[Ad] Endereço:National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan, China.
[Ti] Título:Suppressor of rid1 (SID1) shares common targets with RID1 on florigen genes to initiate floral transition in rice.
[So] Source:PLoS Genet;13(2):e1006642, 2017 Feb.
[Is] ISSN:1553-7404
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The transition from vegetative to reproductive growth is a critical process in the life cycle of higher plants. Previously, we cloned Rice Indeterminate 1 (RID1), which acts as the master switch for the transition from the vegetative to reproductive phase in rice. Although the photoperiod pathway of RID1 inducing expression of the florigen genes Hd3a and RFT1 via Ehd1 has been established, the alternative pathways for the essential flowering transition need to be further examined. Here, we identified a Suppressor of rid1 (SID1), which rescues the never-flowering phenotype of rid1. SID1 encodes an INDETERMINATE DOMAIN (IDD) transcription factor. Mutation in SID1 showed the delayed flowering phenotype. Gain-of-function of SID1, OsIDD1, or OsIDD6 could restore the rid1 to flowering. Further analyses showed SID1 and RID1 directly target the promoter regions of Hd3a and RFT1, two florigen genes in rice. Taken together, our results reveal an autonomous flowering pathway might be mediated by RID1, thereby controlling the phase transition from vegetative to reproductive development in rice.
[Mh] Termos MeSH primário: Florígeno/metabolismo
Flores/genética
Regulação da Expressão Gênica de Plantas
Oryza/genética
Proteínas de Plantas/genética
Fatores de Transcrição/genética
[Mh] Termos MeSH secundário: Sequência de Bases
Flores/metabolismo
Flores/efeitos da radiação
Mutação
Oryza/metabolismo
Oryza/efeitos da radiação
Fenótipo
Fotoperíodo
Proteínas de Plantas/metabolismo
Regiões Promotoras Genéticas/genética
Ligação Proteica
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Transdução de Sinais/genética
Transdução de Sinais/efeitos da radiação
Fatores de Tempo
Fatores de Transcrição/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Florigen); 0 (Plant Proteins); 0 (Transcription Factors)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170607
[Lr] Data última revisão:
170607
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170225
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pgen.1006642


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[PMID]:27348248
[Au] Autor:Putterill J; Varkonyi-Gasic E
[Ad] Endereço:The Flowering Lab, School of Biological Sciences, University of Auckland, Auckland, New Zealand. Electronic address: j.putterill@auckland.ac.nz.
[Ti] Título:FT and florigen long-distance flowering control in plants.
[So] Source:Curr Opin Plant Biol;33:77-82, 2016 Oct.
[Is] ISSN:1879-0356
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The great hunt for florigen, the universal, long distance flowering regulator proposed by Chailakhan in the 1930s, resulted in the discovery a decade ago that FT-like proteins fulfilled the predictions for florigen. They are small (∼175 amino acids), globular, phosphatidylethanolamine-binding (PEBP) proteins, phloem-expressed, graft-transmissible and able to move to the shoot apex to act as potent stimulators of flowering in many plants. Genes that regulate Arabidopsis FT protein movement and some features of Arabidopsis FT protein that make it an effective florigen have recently been identified. Although floral promotion via graft transmission of FT has not been demonstrated in trees, FT-like genes have been successfully applied to reducing the long juvenile (pre-flowering) phase of many trees enabling fast track breeding.
[Mh] Termos MeSH primário: Florígeno/metabolismo
Flores/crescimento & desenvolvimento
Desenvolvimento Vegetal/genética
Reguladores de Crescimento de Planta/metabolismo
Proteínas de Plantas/genética
Plantas/genética
[Mh] Termos MeSH secundário: Arabidopsis/genética
Arabidopsis/crescimento & desenvolvimento
Arabidopsis/metabolismo
Proteínas de Arabidopsis/genética
Proteínas de Arabidopsis/metabolismo
Proteínas de Plantas/metabolismo
Plantas/metabolismo
Árvores/genética
Árvores/crescimento & desenvolvimento
Árvores/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (FT protein, Arabidopsis); 0 (Florigen); 0 (Plant Growth Regulators); 0 (Plant Proteins)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160628
[St] Status:MEDLINE


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[PMID]:27095397
[Au] Autor:Bai B; Zhao J; Li Y; Zhang F; Zhou J; Chen F; Xie X
[Ad] Endereço:Shandong Rice Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, PR China. Electronic address: baibosdau@163.com.
[Ti] Título:OsBBX14 delays heading date by repressing florigen gene expression under long and short-day conditions in rice.
[So] Source:Plant Sci;247:25-34, 2016 Jun.
[Is] ISSN:1873-2259
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:B-box (BBX) proteins are zinc finger proteins containing B-box domains, which have roles in Arabidopsis growth and development. However, little is known concerning rice BBXs. Herein, we identified a rice BBX protein, Oryza sativa BBX14 (OsBBX14). OsBBX14 is highly expressed in flag leaf blades. OsBBX14 expression shows a diurnal rhythm under photoperiodic conditions and subsequent continuous white light. OsBBX14 is located in the nucleus and has transcriptional activation potential. OsBBX14-overexpression (OsBBX14-OX) lines exhibited delayed heading date under long-day (LD) and short-day (SD) conditions, whereas RNAi lines of OsBBX14 lines had similar heading dates to the WT. The florigen genes, Hd3a and RFT1, were downregulated in the OsBBX14-OX lines under LD and SD conditions. Under LD conditions, Hd1 was expressed higher in the OsBBX14-OX lines than in the wild type (WT), and the rhythmic expression of circadian clock genes, OsLHY and OsPRR1, was changed in OsBBX14-OX lines. Thus, OsBBX14 acts as a floral repressor by promoting Hd1 expression under LD conditions, probably because of crosstalk with the circadian clock. Under SD conditions, Ehd1 expression was reduced in OsBBX14-OX lines, but Hd1 and circadian clock gene expressions were unaffected, indicating that OsBBX14 acts as a repressor of Ehd1. Our findings suggested that OsBBX14 regulates heading date differently under LD and SD conditions.
[Mh] Termos MeSH primário: Florígeno/metabolismo
Regulação da Expressão Gênica de Plantas
Oryza/genética
Reguladores de Crescimento de Planta/metabolismo
Proteínas de Plantas/metabolismo
[Mh] Termos MeSH secundário: Relógios Circadianos
Ritmo Circadiano
Regulação para Baixo
Flores/genética
Flores/fisiologia
Flores/efeitos da radiação
Expressão Gênica
Genes Reporter
Luz
Oryza/fisiologia
Oryza/efeitos da radiação
Fotoperíodo
Folhas de Planta/genética
Folhas de Planta/fisiologia
Folhas de Planta/efeitos da radiação
Proteínas de Plantas/genética
Fatores de Transcrição/genética
Fatores de Transcrição/metabolismo
Regulação para Cima
Dedos de Zinco
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Florigen); 0 (Plant Growth Regulators); 0 (Plant Proteins); 0 (Transcription Factors)
[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:160421
[St] Status:MEDLINE


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[PMID]:26845309
[Au] Autor:Satake A; Seki M; Iima M; Teramoto T; Nishiura Y
[Ad] Endereço:Departmnet of Biology, Faculty of Sciences, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. Electronic address: akiko.satake@kyudai.jp.
[Ti] Título:Florigen distribution determined by a source-sink balance explains the diversity of inflorescence structures in Arabidopsis.
[So] Source:J Theor Biol;395:227-237, 2016 Apr 21.
[Is] ISSN:1095-8541
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The ability to continue flowering after loss of inductive environmental cues that trigger flowering is termed floral commitment. Reversible transition involving a switch from floral development back to vegetative development has been found in Arabidopsis mutants and many plant species. Although the molecular basis for floral commitment remains unclear, recent studies suggest that the persistent activity of FLOWERING LOCUS T (FT) at inflorescences is required for floral commitment in Arabidopsis thaliana. Because FT encodes a mobile signal, florigen, which is generally transported from leaves to meristems through the phloem, understanding the transportation dynamics of FT is required to explore the role of FT on floral commitment. Here we developed a transportation model of leaf- and inflorescence-derived florigen and sucrose based on pressure-flow hypothesis. Depending on the demanded level of florigen supply for floral commitment of each floral meristem, the model predicted the change in inflorescence pattern from stable commitment to flower, transient flowering, and complete reversion. FT activity in inflorescence partly suppressed floral reversion, but complete suppression was achieved only when inflorescence became a source of sucrose. This finding highlights the importance of monitoring the spatio-temporal sucrose distribution and floral stimulus to understand inflorescence development mechanism.
[Mh] Termos MeSH primário: Proteínas de Arabidopsis/metabolismo
Arabidopsis/metabolismo
Florígeno/metabolismo
Modelos Biológicos
Floema/metabolismo
Folhas de Planta/metabolismo
[Mh] Termos MeSH secundário: Transporte Biológico Ativo/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (FT protein, Arabidopsis); 0 (Florigen)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:170725
[Lr] Data última revisão:
170725
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160205
[St] Status:MEDLINE


  5 / 47 MEDLINE  
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[PMID]:26765652
[Au] Autor:Wolabu TW; Zhang F; Niu L; Kalve S; Bhatnagar-Mathur P; Muszynski MG; Tadege M
[Ad] Endereço:Department of Plant and Soil Sciences, Institute for Agricultural Biosciences, Oklahoma State University, 3210 Sam Noble Parkway, Ardmore, OK, 73401, USA.
[Ti] Título:Three FLOWERING LOCUS T-like genes function as potential florigens and mediate photoperiod response in sorghum.
[So] Source:New Phytol;210(3):946-59, 2016 May.
[Is] ISSN:1469-8137
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Sorghum is a typical short-day (SD) plant and its use in grain or biomass production in temperate regions depends on its flowering time control, but the underlying molecular mechanism of floral transition in sorghum is poorly understood. Here we characterized sorghum FLOWERING LOCUS T (SbFT) genes to establish a molecular road map for mechanistic understanding. Out of 19 PEBP genes, SbFT1, SbFT8 and SbFT10 were identified as potential candidates for encoding florigens using multiple approaches. Phylogenetic analysis revealed that SbFT1 clusters with the rice Hd3a subclade, while SbFT8 and SbFT10 cluster with the maize ZCN8 subclade. These three genes are expressed in the leaf at the floral transition initiation stage, expressed early in grain sorghum genotypes but late in sweet and forage sorghum genotypes, induced by SD treatment in photoperiod-sensitive genotypes, cooperatively repressed by the classical sorghum maturity loci, interact with sorghum 14-3-3 proteins and activate flowering in transgenic Arabidopsis plants, suggesting florigenic potential in sorghum. SD induction of these three genes in sensitive genotypes is fully reversed by 1 wk of long-day treatment, and yet, some aspects of the SD treatment may still make a small contribution to flowering in long days, indicating a complex photoperiod response mediated by SbFT genes.
[Mh] Termos MeSH primário: Florígeno/metabolismo
Genes de Plantas
Fotoperíodo
Proteínas de Plantas/genética
Sorghum/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Arabidopsis/genética
Flores/genética
Flores/fisiologia
Fluorescência
Regulação da Expressão Gênica de Plantas
Genótipo
Mutação/genética
Fenótipo
Proteína de Ligação a Fosfatidiletanolamina/química
Proteína de Ligação a Fosfatidiletanolamina/genética
Proteína de Ligação a Fosfatidiletanolamina/metabolismo
Filogenia
Proteínas de Plantas/química
Proteínas de Plantas/metabolismo
Plantas Geneticamente Modificadas
Ligação Proteica
Alinhamento de Sequência
Sorghum/crescimento & desenvolvimento
Especificidade da Espécie
Transformação Genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Florigen); 0 (Phosphatidylethanolamine Binding Protein); 0 (Plant Proteins)
[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:160115
[St] Status:MEDLINE
[do] DOI:10.1111/nph.13834


  6 / 47 MEDLINE  
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[PMID]:26440648
[Au] Autor:Kawamoto N; Endo M; Araki T
[Ad] Endereço:a Division of Integrated Life Science; Graduate School of Biostudies; Kyoto University ; Kyoto , Japan.
[Ti] Título:Expression of a kinase-dead form of CPK33 involved in florigen complex formation causes delayed flowering.
[So] Source:Plant Signal Behav;10(12):e1086856, 2015.
[Is] ISSN:1559-2324
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Regulation of flowering time is crucial for reproductive success of plants. FLOWERING LOCUS T (FT) protein is a central component of florigen and forms a ternary complex with 14-3-3 and FD, a basic leucine zipper transcription factor, in the shoot apex and promotes flowering. This complex formation requires phosphorylation of threonine residue at position 282 of FD. A calcium-dependent protein kinase CPK33 is responsible for the phosphorylation. However, possibly due to functional redundancy among calcium-dependent protein kinases, impact of the loss of CPK33 reported in the previous study was rather limited. Here, we report that expression of a kinase-dead form of CPK33 caused a clear delayed-flowering phenotype, supporting for an important role of CPK33 in florigen function through FD phosphorylation.
[Mh] Termos MeSH primário: Proteínas de Arabidopsis/metabolismo
Arabidopsis/enzimologia
Arabidopsis/fisiologia
Florígeno/metabolismo
Flores/enzimologia
Flores/fisiologia
Proteínas Quinases/metabolismo
[Mh] Termos MeSH secundário: Genes Dominantes
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (Florigen); EC 2.7.- (Protein Kinases); EC 2.7.1.- (CPK33 protein, Arabidopsis)
[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:151007
[St] Status:MEDLINE
[do] DOI:10.1080/15592324.2015.1086856


  7 / 47 MEDLINE  
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[PMID]:26374394
[Au] Autor:Bratzel F; Turck F
[Ad] Endereço:Max Planck Institute for Plant Breeding Research, Department of Plant Developmental Biology, Carl von Linne Weg 10, 50829, Cologne, Germany.
[Ti] Título:Molecular memories in the regulation of seasonal flowering: from competence to cessation.
[So] Source:Genome Biol;16:192, 2015 Sep 15.
[Is] ISSN:1474-760X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Plants commit to flowering based on endogenous and exogenous information that they can remember across mitotic cell divisions. Here, we review how signal perception and epigenetic memory converge at key integrator genes, and we show how variation in their regulatory circuits supports the diversity of plant lifestyles.
[Mh] Termos MeSH primário: Flores/crescimento & desenvolvimento
Flores/genética
Regulação da Expressão Gênica de Plantas
Estações do Ano
[Mh] Termos MeSH secundário: Arabidopsis/genética
Arabidopsis/crescimento & desenvolvimento
Brassicaceae/crescimento & desenvolvimento
Cromatina/química
Cromatina/metabolismo
Epigênese Genética
Evolução Molecular
Florígeno/metabolismo
Flores/metabolismo
Poaceae/genética
Poaceae/crescimento & desenvolvimento
RNA não Traduzido/metabolismo
Fatores de Transcrição/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; REVIEW
[Nm] Nome de substância:
0 (Chromatin); 0 (Florigen); 0 (RNA, Untranslated); 0 (Transcription Factors)
[Em] Mês de entrada:1605
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150917
[St] Status:MEDLINE
[do] DOI:10.1186/s13059-015-0770-6


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[PMID]:26252567
[Au] Autor:Li C; Lin H; Dubcovsky J
[Ad] Endereço:Department Plant Sciences, University of California, Davis, CA, USA.
[Ti] Título:Factorial combinations of protein interactions generate a multiplicity of florigen activation complexes in wheat and barley.
[So] Source:Plant J;84(1):70-82, 2015 Oct.
[Is] ISSN:1365-313X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The FLOWERING LOCUS T (FT) protein is a central component of a mobile flowering signal (florigen) that is transported from leaves to the shoot apical meristem (SAM). Two FT monomers and two DNA-binding bZIP transcription factors interact with a dimeric 14-3-3 protein bridge to form a hexameric protein complex. This complex, designated as the 'florigen activation complex' (FAC), plays a critical role in flowering. The wheat homologue of FT, designated FT1 (= VRN3), activates expression of VRN1 in the leaves and the SAM, promoting flowering under inductive long days. In this study, we show that FT1, other FT-like proteins, and different FD-like proteins, can interact with multiple wheat and barley 14-3-3 proteins. We also identify the critical amino acid residues in FT1 and FD-like proteins required for their interactions, and demonstrate that 14-3-3 proteins are necessary bridges to mediate the FT1-TaFDL2 interaction. Using in vivo bimolecular fluorescent complementation (BiFC) assays, we demonstrate that the interaction between FT1 and 14-3-3 occurs in the cytoplasm, and that this complex is then translocated to the nucleus, where it interacts with TaFDL2 to form a FAC. We also demonstrate that a FAC including FT1, TaFDL2 and Ta14-3-3C can bind to the VRN1 promoter in vitro. Finally, we show that relative transcript levels of FD-like and 14-3-3 genes vary among tissues and developmental stages. Since FD-like proteins determine the DNA specificity of the FACs, variation in FD-like gene expression can result in spatial and temporal modulation of the effects of mobile FT-like signals.
[Mh] Termos MeSH primário: Florígeno/metabolismo
Hordeum/metabolismo
Proteínas de Plantas/metabolismo
Triticum/metabolismo
[Mh] Termos MeSH secundário: Regulação da Expressão Gênica de Plantas
Ligação Proteica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Florigen); 0 (Plant Proteins)
[Em] Mês de entrada:1607
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150808
[St] Status:MEDLINE
[do] DOI:10.1111/tpj.12960


  9 / 47 MEDLINE  
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[PMID]:26089146
[Au] Autor:Higuchi Y; Hisamatsu T
[Ad] Endereço:NARO Institute of Floricultural Science (NIFS), National Agriculture and Food Research Organization (NARO), 2-1 Fujimoto, Tsukuba, Ibaraki 305-8519, Japan.
[Ti] Título:CsTFL1, a constitutive local repressor of flowering, modulates floral initiation by antagonising florigen complex activity in chrysanthemum.
[So] Source:Plant Sci;237:1-7, 2015 Aug.
[Is] ISSN:1873-2259
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:Chrysanthemums require repeated cycles of short-day (SD) photoperiod for successful anthesis, but their vegetative state is strictly maintained under long-day (LD) or night-break (NB) conditions. We have previously demonstrated that photoperiodic flowering of a wild diploid chrysanthemum (Chrysanthemum seticuspe f. boreale) is controlled by a pair of systemic floral regulators, florigen (CsFTL3) and anti-florigen (CsAFT), produced in the leaves. Here, we report the functional characterisation of a local floral regulator, CsTFL1, a chrysanthemum orthologue of TERMINAL FLOWER 1 gene in Arabidopsis. Constitutive expression of CsTFL1 in C. seticuspe (CsTFL1-ox) resulted in extremely late flowering under SD and prevented up-regulation of floral meristem identity genes in shoot tips and leaves. Bimolecular fluorescence complementation assay showed that both CsTFL1 and CsFTL3 interacted with CsFDL1, a bZIP transcription factor FD homologue, in the nucleus. The transient gene expression assay indicated that CsTFL1 suppresses flowering by directly antagonising the flower inductive activity of the CsFTL3-CsFDL1 complex. Our results suggest that strict maintenance of vegetative state under non-inductive photoperiod is achieved by the coordinated action of both the systemic floral inhibitor and local floral inhibitor CsTFL1, which is constitutively expressed in shoot tips.
[Mh] Termos MeSH primário: Chrysanthemum/genética
Florígeno/antagonistas & inibidores
Flores/genética
Regulação da Expressão Gênica de Plantas
Reguladores de Crescimento de Planta/antagonistas & inibidores
Proteínas Repressoras/genética
[Mh] Termos MeSH secundário: Chrysanthemum/crescimento & desenvolvimento
Chrysanthemum/efeitos da radiação
Flores/crescimento & desenvolvimento
Flores/efeitos da radiação
Regulação da Expressão Gênica no Desenvolvimento
Luz
Meristema/genética
Meristema/crescimento & desenvolvimento
Meristema/efeitos da radiação
Fotoperíodo
Folhas de Planta/genética
Folhas de Planta/efeitos da radiação
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Brotos de Planta/genética
Brotos de Planta/crescimento & desenvolvimento
Brotos de Planta/efeitos da radiação
Plantas Geneticamente Modificadas
Proteínas Repressoras/metabolismo
Regulação para Cima
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Florigen); 0 (Plant Growth Regulators); 0 (Plant Proteins); 0 (Repressor Proteins)
[Em] Mês de entrada:1603
[Cu] Atualização por classe:150619
[Lr] Data última revisão:
150619
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150620
[St] Status:MEDLINE


  10 / 47 MEDLINE  
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[PMID]:26084920
[Au] Autor:Mascheretti I; Turner K; Brivio RS; Hand A; Colasanti J; Rossi V
[Ad] Endereço:Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Unità di Ricerca per la Maiscoltura, I-24126 Bergamo, Italy (I.M., R.S.B., V.R.); andDepartment of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1 (K.T., A.H., J.C.).
[Ti] Título:Florigen-Encoding Genes of Day-Neutral and Photoperiod-Sensitive Maize Are Regulated by Different Chromatin Modifications at the Floral Transition.
[So] Source:Plant Physiol;168(4):1351-63, 2015 Aug.
[Is] ISSN:1532-2548
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The activity of the maize (Zea mays) florigen gene ZEA CENTRORADIALIS8 (ZCN8) is associated with the floral transition in both day-neutral temperate maize and short-day (SD)-requiring tropical maize. We analyzed transcription and chromatin modifications at the ZCN8 locus and its nearly identical paralog ZCN7 during the floral transition. This analysis was performed with day-neutral maize (Zea mays ssp. mays), where flowering is promoted almost exclusively via the autonomous pathway through the activity of the regulatory gene indeterminate1 (id1), and tropical teosinte (Zea mays ssp. parviglumis) under floral inductive and noninductive photoperiods. Comparison of ZCN7/ZCN8 histone modification profiles in immature leaves of nonflowering id1 mutants and teosinte grown under floral inhibitory photoperiods reveals that both id1 floral inductive activity and SD-mediated induction result in histone modification patterns that are compatible with the formation of transcriptionally competent chromatin environments. Specific histone modifications are maintained during leaf development and may represent a chromatin signature that favors the production of processed ZCN7/ZCN8 messenger RNA in florigen-producing mature leaf. However, whereas id1 function promotes histone H3 hyperacetylation, SD induction is associated with increased histone H3 dimethylation and trimethylation at lysine-4. In addition, id1 and SD differently affect the production of ZCN7/ZCN8 antisense transcript. These observations suggest that distinct mechanisms distinguish florigen regulation in response to autonomous and photoperiod pathways. Finally, the identical expression and histone modification profiles of ZCN7 and ZCN8 in response to floral induction suggest that ZCN7 may represent a second maize florigen.
[Mh] Termos MeSH primário: Cromatina/genética
Florígeno/metabolismo
Regulação da Expressão Gênica de Plantas
Código das Histonas
Zea mays/genética
[Mh] Termos MeSH secundário: Flores/genética
Flores/efeitos da radiação
Histonas/genética
Histonas/metabolismo
Luz
Fotoperíodo
Folhas de Planta/genética
Folhas de Planta/efeitos da radiação
Proteínas de Plantas/metabolismo
RNA Mensageiro/genética
RNA de Plantas/genética
Fatores de Transcrição/genética
Fatores de Transcrição/metabolismo
Zea mays/efeitos da radiação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Chromatin); 0 (Florigen); 0 (Histones); 0 (Plant Proteins); 0 (RNA, Messenger); 0 (RNA, Plant); 0 (Transcription Factors)
[Em] Mês de entrada:1606
[Cu] Atualização por classe:160817
[Lr] Data última revisão:
160817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150619
[St] Status:MEDLINE
[do] DOI:10.1104/pp.15.00535



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