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| Registros recuperados: 103 | |
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| Li,Hui-Liang; Guo,Dong; Zhu,Jia-Hong; Wang,Ying; Peng,Shi-Qing. |
| Abstract Histone methylation plays a crucial role in various biological processes, from heterochromatin formation to transcriptional regulation. Currently, no information is available regarding histone methylation modifiers in the important rubber-producing plant Hevea brasiliensis. Here, we identified 47 histone methyltransferase (HMT) genes and 25 histone demethylase (HDM) genes as possible members of the histone methylation modifiers in the rubber tree genome. According to the structural features of HMT and HDM, the HbHMTs were classified into two groups (HbPRMs and HbSDGs), the HbHDMs have two groups (HbLSDs and HbJMJs). Expression patterns were analyzed in five different tissues and at different phases of somatic embryogenesis. HbSDG10, 21, 25, 33,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Histone methylation; Histone methyltransferase; Histone demethylase; Somatic embryogenesis. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100301 |
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| GUZZO,CAIO D.; CARVALHO,LEONARDO B. DE; GIANCOTTI,PAULO R.F.; ALVES,PEDRO L.C.A.; GONÇALVES,ELAINE C.P.; MARTINS,JOSÉ V.F.. |
| Rubber tree production is reduced by weeds that compete for environmental resources; therefore, the timing and duration of weed control influences weed interference. The objectives of this study were to evaluate the growth of rubber tree (Hevea brasiliensis) plants, to determine the critical period for weed control, and to evaluate the growth recovery of rubber trees that coexisted with weeds for different periods of time after planting. Two groups of treatments were established under field conditions in the first year of the investigation: one group contained crescent periods of weed infestation, while the other contained crescent periods of weed control, also including a weed-free check and a total weedy check. In the second year of the investigation,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Weed interference; Critical period for weed control; Growth recovery. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100495 |
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| Cunha,Tony Jarbas Ferreira; Blancaneaux,Philippe; Calderano Filho,Braz; Carmo,Ciriaca Arcangela Ferreira De Santana Do; Garcia,Neusa Catarina Pinheiro; Lima,Edla Maria Bezerra. |
| A expansão da heveicultura em regiões não tradicionais que apresentam condições edafoclimáticas diferentes do seu habitat natural, tem seu desempenho prejudicado pela carência de informações técnicas. No Estado de Minas Gerais, a falta de conhecimento dos fatores inerentes às relações solo-planta tem-se tornado uma séria limitação no processo de implantação e exploração de seringais. Neste trabalho foi estudado um transecto sob vegetação de seringueira, situada na fazenda experimental da Epamig no vale do Piranga, no município de Oratórios, MG. As caracterizações morfoestruturais revelaram forte diferenciação lateral dos solos na vertente, sendo os Latossolos predominantes no topo, e nas partes mais baixas, os Podzólicos, com presença de horizontes B... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedologia; Latossolos; Podzólicos; Biomassa; Hevea brasiliensis. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000100017 |
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| MARTINS,ANTONIO LUCIO MELLO; RAMOS,NILZA PATRICIA; GONÇALVES,PAULO DE SOUZA; VAL,KATIA SCOTT DO. |
| Este trabalho foi instalado na Estação Experimental de Agronomia de Pindorama, SP, com a finalidade de avaliar a interação enxerto vs. porta-enxertos de seringueira, Hevea brasiliensis (Willd. ex Adr. de Juss.) Müell. Arg. Os clones utilizados foram IAN 873, RRIM 600, RRIM 701, PB 235, PR 107 e GT 1, enxertados em seis diferentes porta-enxertos provenientes de sementes ilegítimas dos clones IAN 873, RRIM 600, RRIM 701, PB 235, GT 1 e de sementes não selecionadas. O delineamento utilizado foi o de blocos ao acaso, com parcelas subdivididas, tendo os porta-enxertos como tratamentos e os clones (enxertos) como subtratamentos, em quatro repetições. Os resultadosmostram que no período de avaliação o porta-enxerto GT 1 e IAN 873 foram os que produziram os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Clonagem; Propagação vegetativa; Compatibilidade do enxerto; Vigor de semente. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000900006 |
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| Martins,Maria Bernadete Gonçalves; Zieri,Rodrigo. |
| Rubber trees are easily recognizable for being woody, medium to large-sized plants, having a typical deciduous behavior, and especially because they produce latex. The purpose of this work was to study the anatomy and morphology of the leaf, comparing rubber tree &91;Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.&93; clones (RRIM 600 and GT 1) grafted on the same root stock (Tjir 1), grown under the same climatic and soil conditions. This study allowed clones to be differentiated and also provided information on the location and disposition of laticifers in the leaf tissue. Cross sections of the mesophyll, center ribbing and petiole regions were made, followed by usual permanent histological blade methods. Biometric analyses of tissue... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Leaf; Clones. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400015 |
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| Bernardo,Eduardo Roberto de Almeida; Santos,Jaime Maia dos; Silva,Ricardo Adaime da; Cassetari Neto,Daniel; Santos,Suzana Souza dos; Delmadi,Leila; Rocha,Vander de Freitas. |
| Este trabalho foi realizado com o objetivo de efetuar um levantamento da ocorrência de Meloidogyne exigua em seringueira em São José do Rio Claro, MT. Foram amostradas 191 propriedades agrícolas, totalizando cerca de 18.000ha. Os nematóides foram identificados no Laboratório de Nematologia do Departamento de Fitossanidade da FCAV/UNESP, em Jaboticabal, SP. Foram encontrados níveis populacionais de M. exigua entre 0 e 61.824 juvenis/5g de raízes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nematóide das galhas; Meloidogyne exigua; Hevea brasiliensis; Botryodiplodia theobromae. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000100025 |
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| CASTRO, F. de A.. |
| As características climatológicas constituem fatores de grande importância na germinação, crescimento e desenvolvimento das plantas. Quando esses fatores nãos satisfazem as exigências de uma determinada espécie, esta não pode completar seu ciclo vital. A "Hevea brasiliensis" é uma espécie cujo ponto de compensação luminosa é mais alto que a intensidade de luz sob a manta fechada. A exigência de alta intensidade luminosa é comprovada pelo fato de apenas serem encontradas plântulas em clareiras naturais. A seringueira, nos estádios iniciais, deve suportar uma fase de forte supressão e, mesmo aquelas que ultrapassarem a esta fase, mas que ainda não são emergentes, devem ter o crescimento fortemente. restringido. O desbaste, portanto, para eliminação de sombra... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Ruber tree; Seringal Pirã de Rã; Guiomard Santos (AC); Alto Purus; Acre; Amazônia Ocidental.; Seringueira; Hevea brasiliensis; Manejo; Caucho; Silvicultura.; Silviculture.. |
| Ano: 1979 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492286 |
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| Partelli,Fábio Luiz; Araújo,André Vasconcellos; Vieira,Henrique Duarte; Dias,Jairo Rafael Machado; Menezes,Luis Fernando Tavares de; Ramalho,José Cochicho. |
| The objective of this work was to evaluate the influence of intercropping 'Conilon' coffee (Coffea canephora) with rubber trees on coffee tree microclimate, nutrition, growth, and yield. Rubber trees were planted in two double rows 33 m apart, with 4x2.3 m spacing between plants. Treatments consisted of the distances from the coffee plants to the rubber trees: 3, 6, 9, 12, and 15 m. Measurements of atmospheric variables (temperature, irradiance, and relative humidity), leaf nutrient concentration, internode length of plagiotropic and orthotropic branches, individual leaf area, chlorophyll content, and yield were performed. Intercropping promotes changes in the microclimatic conditions of coffee plants close to rubber trees, with reduction of temperature... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea canéfora; Hevea brasiliensis; Irradiance; Monoculture; Shading. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014001100872 |
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| Lara,Fernando M.; Tanzini,Marcel R.. |
| To determine the resistance of rubber tree clones (Hevea brasiliensis) to Leptopharsa heveae Drake and Poor (Heteroptera: Tingidae) a trial was held in Itiquira, MT, in 1994/95 by comparing the following clones: AVROS 2037, Fx 4037, GT 1, HARBEL, IAC 207, IAN 4493, IAN 717, IAN 873, RO 38, and RO 46. Free choice and no choice trials involving preference for oviposition and feeding were carried out under field and laboratory conditions. The symptoms caused by the insects, number of excrements, number of eggs/female/leaflet, mortality rate, and number of insects/leaflet were scored. The results showed that clones Fx 4037, RO 38 and RO 46 were resistant by nonpreference for feeding and oviposition, whereas GT and IAN 873 were the most susceptible. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Hemiptera; Hevea brasiliensis; Host plant resistance; Antixenosis. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000300003 |
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| AZZINI,ANISIO; GONÇALVES,PAULO DE SOUZA; GONDIM-TOMAZ,ROSE MARRY ARAÚJO. |
| Determinou-se o diâmetro dos tubos crivados em 15 clones de seringueira [Hevea brasiliensis (Willd. ex Adr. de Juss.) Müell. Arg.], representando material de alta (IAN 873, IAC 41, RRIM 600, PR 107, IAN 717, IAC 54 e IAC 15) e de baixa (IAC 53, IAC 39, IAC 59, IAC 51, IAC 16, IAC 22, IAC 19 e IAC 9) produção de borracha. Os resultados mostraram que houve correlação significativa (R2 = 0,825) entre o diâmetro dos tubos crivados e a produção de borracha (y = 0,1961x2 - 14,77x + 281,7). |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Hevea brasiliensis; Tubos crivados; Produção de borracha. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051998000100008 |
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| Mattos,Viviane M.; Feres,Reinaldo J. F.. |
| Eutetranychus banksi (McGregor, 1914) is a phytophagous, polyphagous and cosmopolitan species recorded on 23 plant families in 24 countries in North, Central and South Americas, Europe, Asia, and Africa. Specimens of E. banksi present morphological variability among individuals of the same population and also among populations from different host species, being commonly referred to as a polytypic species, despite the fact that studies based on meristic comparisons of these populations are lacking. Also, there is no data available in the literature on the biological life tables of E. banksi on different hosts. Specimens collected in Brazil, Guadeloupe, Martinique, Mexico, and Paraguay were investigated in order to recognize morphological patterns among... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arrenothoky; Citrus sinensis; Hevea brasiliensis; Interbreeding; Multivariate morphometry. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300007 |
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| Pethin,Denduang; Nakkanong,Korakot; Nualsri,Charassri. |
| Thailand is the world leader in the production of latex extracted from the rubber tree (Hevea brasiliensis). However, the most cultivated clone RRIM 600, is highly susceptible to diseases, and there is economic incentive to develop new rubber tree clones. Four rubber tree clones (T2, SK1, NK1 and SK3) that have high latex yield potential from plantations in Southern Thailand were selected for this study. Yield performance, latex biochemical parameters and anatomical characteristics of bark were monitored for two years, using RRIM 600 clones in the same fields as paired controls. The average yields of the clones SK1, NK1 and SK3 were 129.3, 74.2 and 53.9 g per tree per tapping, respectively, surpassing the paired RRIM 600 controls (94.3, 49.9 and 43.9 g per... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Random Amplified Polymorphic DNA; Latex yield; Latex biochemical parameters; Anatomical characteristics of bark. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400306 |
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| Gonçalves,Paulo de Souza; Silva,Marcelo de Almeida; Aguiar,Adriano Tosoni da Eira; Martins,Maria Alice; Scaloppi Junior,Erivaldo José; Gouvêa,Lígia Regina Lima. |
| The Hevea breeding program of Instituto Agronômico de Campinas (IAC) has completed clonal evaluation on the following series: IAC 100, IAC 200 and IAC 300. The performance of 22 clones of Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg., evolved at IAC, over a period of eleven years was evaluated in the Western Central part of the São Paulo State, Brazil. Among these 22 new clones, six were intraspecific hybrid clones (IAC 400, IAC 404, IAC 405, IAC 406, IAC 410, IAC 412) and the remaining are primary those resulted from selected ortets within half-sib progenies. An old popular clone RRIM 600, of Malaysian origin, was used as the control. The trial was laid out in a randomized block design with three replications. Yield performance over a period of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Yield; Vigour; Brown bast; Bark thickness. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300005 |
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| Maggiotto, Selma Regina; Universidade de Brasília; Oliveira, Dalziza de; Instituto Agronômico do Paraná; Marur, Celso Jamil; Instituto Agronômico do Paraná; Stivari, Sonia Maria Soares; Universidade Estadual de Maringá; Leclerc, Monique; University of Georgia; Wagner-Riddle, Claudia; University of Guelph. |
| Rubber tree plantations may improve the soil’s physical and chemical properties, and they may sequester atmospheric carbon in the biomass or the soil. However, the potential role of these plantations in sequestering carbon in the soil and plant biomass has not been fully evaluated. This study evaluated rubber tree plantations at Paranapoema, which is located in the northwestern region of the Paraná state of Brazil, to measure the biomass in plantations of different ages and to determine the organic carbon content and d13C in the soils. Biomass accumulation was evaluated using the destructive method in plantations of different ages. The total carbon stock in the top 60 cm of the soil was 63.4 Mg C ha-1 for the pasture adjacent to the plantations and 66.8... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.05.00-0 rubber tree; Hevea brasiliensis; Soil sigma13C; Isotopic ratio; Soil carbon stocks Agrometeorologia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17404 |
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| Costa,Reginaldo Brito da; Resende,Marcos Deon Vilela de; Gonçalves,Paulo de Souza; Roa,Raul Alffonso Rodrigues; Feitosa,Kênia Cristine de Oliveira. |
| O trabalho objetivou estimar parâmetros e valores genéticos para os caracteres altura, diâmetro, produção de látex e produtividade de progênies de seringueira. As progênies meio-irmãos foram estabelecidas sob delineamento de blocos ao acaso, com 28 tratamentos (progênies), cinco repetições e dez plantas por parcela. Aos três anos de idade, as progênies foram avaliadas quanto aos caracteres: a) altura total (cm); b) diâmetro (mm); c) Produção de borracha seca (g) e produtividade (g cm-2). As estimativas dos coeficientes de herdabilidades individuais (0,33; 0,24 e 0,51) para os caracteres altura, diâmetro e produtividade, respectivamente, foram consideradas expressivas. Para o caráter produção de borracha seca, a estimativa do coeficiente de herdabilidade... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Parâmetros genéticos; Herdabilidade; Ganho genético. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000100007 |
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| Verardi,Cecília Khusala; Scaloppi Junior,Erivaldo José; Gonçalves,Paulo de Souza. |
| The objective of this work was to estimate the genetic parameters, genotypic and phenotypic correlations, and direct and indirect genetic gains among and within rubber tree (Hevea brasiliensis) progenies. The experiment was set up at the Municipality of Jaú, SP, Brazil. A randomized complete block design was used, with 22 treatments (progenies), 6 replicates, and 10 plants per plot at a spacing of 3x3 m. Three‑year‑old progenies were assessed for girth, rubber yield, and bark thickness by direct and indirect gains and genotypic correlations. The number of latex vessel rings showed the best correlations, correlating positively and significantly with girth and bark thickness. Selection gains among progenies were greater than within progeny for all the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Direct and indirect method; Early selection; Selection cycle. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000900015 |
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| Gonçalves,Paulo de Souza; Moraes,Mário Luiz Teixeira de; Silva,Marcelo de Almeida; Gouvêa,Lígia Regina Lima; Aguiar,Adriano Tosoni da Eira; Costa,Reginaldo Brito da. |
| Twenty two open-pollinated Hevea progenies from different parental clones of the Asian origin were tested at five sites in the Northwestern São Paulo State Brazil to investigate the progeny girth growth, rubber yield, bark thickness and plant height. Except for the rubber yield, the analysis of variance indicated highly significant (p<0.01) genotype x environment interaction and heterogeneity of regressions among the progenies. However, the regression stability analysis identified only a few interacting progenies which had regression coefficients significantly different from the expected value of one. The linear regressions of the progeny mean performance at each test on an environmental index (mean of all the progenies in each test) showed the general... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea brasiliensis; Stability; Adaptability; Environmental index; Linear regression. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100004 |
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| Registros recuperados: 103 | |
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