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Inhibition of Auxin Transport from the Ovary or from the Apical Shoot Induces Parthenocarpic Fruit-Set in Tomato Mediated by Gibberellins

SERRANI, Juan Carlos; CARRERA, Esther; RUIZ-RIVERO, Omar; GALLEGO-GIRALDO, Lina; PERES, Lazaro Eustaquio Pereira; GARCIA-MARTINEZ, Jose Luis
Fonte: AMER SOC PLANT BIOLOGISTS Publicador: AMER SOC PLANT BIOLOGISTS
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
26.37%
Fruit-set in tomato (Solanum lycopersicum) depends on gibberellins and auxins (GAs). Here, we show, using the cv MicroTom, that application of N-1-naphthylphthalamic acid (NPA; an inhibitor of auxin transport) to unpollinated ovaries induced parthenocarpic fruit-set, associated with an increase of indole-3-acetic acid (IAA) content, and that this effect was negated by paclobutrazol (an inhibitor of GA biosynthesis). NPA-induced ovaries contained higher content of GA(1) (an active GA) and transcripts of GA biosynthetic genes (SlCPS, SlGA20ox1, and -2). Interestingly, application of NPA to pollinated ovaries prevented their growth, potentially due to supraoptimal IAA accumulation. Plant decapitation and inhibition of auxin transport by NPA from the apical shoot also induced parthenocarpic fruit growth of unpollinated ovaries. Application of IAA to the severed stump negated the plant decapitation effect, indicating that the apical shoot prevents unpollinated ovary growth through IAA transport. Parthenocarpic fruit growth induced by plant decapitation was associated with high levels of GA(1) and was counteracted by paclobutrazol treatment. Plant decapitation also produced changes in transcript levels of genes encoding enzymes of GA biosynthesis (SlCPS and SlGA20ox1) in the ovary...

Desempenho de cultivares de tomate (Lycopersicon esculentum Mill.) sob sistemas orgânicos em cultivo protegido.; Performance of tomato cultivars (Lycopersicon esculentum Mill.) organically-grown under greenhouse conditions.

Tamiso, Luciano Grassi
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 25/05/2005 PT
Relevância na Pesquisa
26.68%
A Agricultura Orgânica no Brasil cresce a taxas superiores a 30 % ao ano, devido, principalmente, a uma maior conscientização dos consumidores, que buscam hábitos alimentares mais saudáveis. Dentre as hortaliças, o tomate orgânico representa uma boa oportunidade de investimento para o produtor. No entanto, não existem recomendações técnicas ou genótipos desenvolvidos exclusivamente para esse sistema de produção, o que dificulta a expansão da área sob manejo orgânico. Diante disso, o presente trabalho teve como objetivo avaliar o desempenho de 11 cultivares de tomate (Avalon, Colibri, HTX – 5415, HTX – 8027, Sahel, San Marzano, San Vito, Júpiter, Raminho, Saladete DRW 3410 e Jane) sob dois sistemas orgânicos distintos em ambiente protegido, de março a outubro de 2004, nos municípios de Ibiúna, SP (experimento I) e Araraquara, SP (experimento II). Os experimentos foram conduzidos em propriedades que produzem tomate orgânico em escala comercial. No experimento I, as plantas foram conduzidas em linhas simples, com uma haste e com poda apical drástica, realizada acima do terceiro racemo. As estufas eram conjugadas, e a irrigação realizada por gotejo, utilizado também para a fertiirrigação com biofertilizantes. O espaçamento adotado foi de 1...

Caracterização fenotípica e avaliação da expressão de genes envolvidos na indução e no florescimento da laranjeira 'x11'; Phenotypic characterization and evaluation of the expression of genes involved in the induction and flowering of 'x11' sweet orange

Voigt, Vanessa
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 03/07/2013 PT
Relevância na Pesquisa
16.91%
A laranjeira ,,x11" é um mutante espontâneo de laranja doce, com seedlings florescendo a partir do primeiro ou segundo ano de cultivo e plantas adultas podendo florescer em várias épocas num mesmo ano. Estas características tornam este mutante um excelente material para estudos de genômica funcional relacionado ao florescimento e a frutificação. Os objetivos deste trabalho foram caracterizar o florescimento da laranjeira ,,x11" em quatro épocas do ano e acompanhar o desenvolvimento do meristema apical em gemas axilares de plantas adultas, em relação às plantas de ,,Valência". Também foi avaliado o perfil de expressão dos genes envolvidos na indução e no florescimento em plantas adultas e juvenis das duas laranjeiras. Plantas adultas de ,,x11" enxertadas em ,,Cravo" e ,,Swingle" foram podadas no outono, inverno, primavera e verão e, em seguida, realizou-se a caracterização do florescimento em ramos novos e a determinação da viabilidade e germinação in vitro de grãos de pólen. O acompanhamento morfo-anatômico do meristema apical foi realizado em quatro estádios das brotações axilares das duas laranjeiras após a poda de outono. A expressão dos genes integradores das vias de indução (FT, SOC1 e LFY), genes repressores (FLC...

Poda apical, densidade de plantas e cobertura plástica do solo na produtividade do tomateiro em cultivo protegido

Bogiani, Júlio César; Anton, Cibele da Silva; Seleguini, Alexsander; Faria Júnior, Max José de Araujo; Seno, Shizuo
Fonte: Instituto Agronômico de Campinas Publicador: Instituto Agronômico de Campinas
Tipo: Artigo de Revista Científica Formato: 145-151
POR
Relevância na Pesquisa
36.83%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Processo FAPESP: 01/14228-6; O objetivo deste trabalho foi o de avaliar o efeito de duas combinações entre densidade de plantas e altura de poda apical, associados à utilização de cobertura plástica do solo, sobre o desenvolvimento e a produção de frutos do tomateiro, híbrido Duradoro (Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)), em ambiente protegido. Foram estabelecidos dois sistemas de cultivo com haste única: SC1 - poda apical após a 5ª inflorescência, com 20.000 plantas ha-1 e SC2 - poda apical após a 2ª inflorescência com 50.000 plantas ha-1; e três condições de cobertura do solo: solo nu; filme de polietileno branco e filme de polietileno preto, adotando-se o delineamento em blocos ao acaso, em esquema de parcelas subdivididas. O experimento foi desenvolvido de junho a novembro de 2003, na UNESP, Câmpus de Ilha Solteira. A adoção do tratamento SC2 determinou maior altura de plantas aos 45 dias após o transplante, maior número de frutos por área e maior produtividade, além da concentração do período de colheita em sete semanas. As coberturas plásticas do solo não influenciaram as variáveis que compõem a produtividade do tomateiro.; The aim of this work was to evaluate the effect of two combinations between plant density and tip pruning height...

Doses e épocas de adubação nitrogenada e poda apical na produção e qualidade das sementes de quiabeiro

Lopes, Antônio Wagner Pereira
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Dissertação de Mestrado Formato: 43 f.
POR
Relevância na Pesquisa
57.07%
Pós-graduação em Agronomia - FEIS; O conhecimento correto das doses e épocas de fornecimento de nitrogênio é de fundamental importância para obtenção de maior produtividade de sementes de quiabo, bem como a utilização da poda apical como fator de estimulo para aumento dessa produção. O presente trabalho teve por objetivo verificar o comportamento do quiabo cultivar Santa Cruz - 47 e sua resposta a diferentes doses e épocas de adubação de nitrogênio em cobertura e o efeito da poda apical. O experimento foi conduzido na Fazenda Experimental da Faculdade de Engenharia de Ilha Solteira - UNESP, localizada em Selvíria-MS. Utilizou-se o delineamento experimental em blocos casualizados com 20 tratamentos e três repetições, obtidos da combinação entre doses de N (0, 25, 50, 75 e 100 kg ha-1 de N), época de cobertura (30 e 45 dias) e poda (sem e com poda). Foram avaliados: o número médio de frutos por planta, o número de sementes por frutos, massa de 100 sementes, produtividade de sementes e qualidade fisiológica de sementes. A aplicação de nitrogênio aos 45 dias após a emergência das plantas proporcionou um maior número de frutos por plantas e aumento na produtividade. Não foram observadas diferenças nas épocas de aplicação de cobertura nitrogenada na massa de 100 sementes. Na resposta da poda apical sobre o número de frutos por planta constatou-se um aumento de 101%. Para o número de sementes por fruto observou-se uma diminuição de 34...

Produção e qualidade de mini tomate em sistema orgânico, dois tipos de condução de hastes e poda apical

Takahashi, Keiko
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Dissertação de Mestrado Formato: x, 42 f. : il. color., gráfs., tabs.,
POR
Relevância na Pesquisa
26.66%
Pós-graduação em Agronomia (Horticultura) - FCA; Tomato is, probably, the vegetable species with the highest number in paper published. However, with the continuous release of new cultivars the need of research also becomes constant. Nevertheless, despite the great importance of cultural practices on tomato yield, there is still lack of research on mini tomato cultivation. Therefore, the present study was conducted to evaluate the effect of top pruning and stem conduction of grafted mini tomato plants, cultivated in organic system, on yield and fruit quality. The experimental design used was the completely randomized blocks, with four treatments, 16 replications and six plants per plot. Treatments were resultant from factorial 2 x 2, with two stem conduction types (secondary stem conducted immediately under the first cluster of main stem, named as traditional conduction; or stems conducted from axillary buds of the two leaves immediately above the grafting point, named as “bottom” stem conduction) and two number of leaves between the top pruning and the last cluster (three or five leaves). Stems conduction type influenced in most of the characteristics evaluated, being that when two “bottom” stems were conducted, results were superior for total and marketable production...

Tipos de condução de hastes na produção e na qualidade de mini tomate em manejo orgânico

Candian, Joara Secchi
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Dissertação de Mestrado Formato: ix, 47 f. : il. color., grafs., tabs
POR
Relevância na Pesquisa
16.06%
Pós-graduação em Agronomia (Horticultura) - FCA; Tomato is an important vegetable crop product, being highly valued by consumers of organic food. Features such as production, size and taste of the fruits can be greatly influenced by plant density that can be increased by reducing the spacing or by increasing the number of stem in each plant. The experiment was conducted in São Manuel-SP between the months of August 2013 on January 2014, with the objective of evaluating the influence of the number of stems per plant and the conduction type in production and physicochemical characteristics of fruits of hybrid Coco tomato, type mini tomatoes. The experiment was conducted in protected cultivation under organic management. The treatments consisted of four different ways of conduction: 2 traditional stems (main stem and stem below the 1st inflorescence); 2 stems coming from axillary buds of cotyledon leaves (named as bottom stem conduction), due to pruning the apical meristem of the plant just above the cotyledons with the seeldlings still in the tray; 3 stems (main stem and two stems side below the 1st and 2nd inflorescences) and 4 stems coming from bottom stem. The fruits were harvested when they wer totally red. It was evaluated total number of fruits per plant...

Flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application

Cruz,Maria C. M.; Oliveira,Adelson F.; Oliveira,Dili L.; V. Neto,João
Fonte: Brazilian Journal of Plant Physiology Publicador: Brazilian Journal of Plant Physiology
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2011 EN
Relevância na Pesquisa
26.53%
This work focuses on the evaluation of flowering and vegetative growth of olive tree submitted to pruning and paclobutrazol application under field conditions with low temperatures during the winter. Two-years-old olive plant variety Grappolo 575, were submitted to light pruning, removing apical dominance, before treatments application. The treatments were organized in a 4×2 factorial scheme, respective to four PBZ concentrations tested: 0, 200, 400 and 800 mg L-1 of PBZ and two plants groups, with and without pruning, in randomized block with four replications. Paclobutrazol concentrations tested did not affect the olive tree flowering. The plant vegetative growth was reduced until 60 days after paclobutrazol application. Pruning resulted in stimulation of emission of vegetative shoots and reduction of flowering.

Abnormal dendritic spines in fragile X knockout mice: Maturation and pruning deficits

Comery, Thomas A.; Harris, Jennifer B.; Willems, Patrick J.; Oostra, Ben A.; Irwin, Scott A.; Weiler, Ivan Jeanne; Greenough, William T.
Fonte: The National Academy of Sciences of the USA Publicador: The National Academy of Sciences of the USA
Tipo: Artigo de Revista Científica
Publicado em 13/05/1997 EN
Relevância na Pesquisa
26.46%
Fragile X syndrome arises from blocked expression of the fragile X mental retardation protein (FMRP). Golgi-impregnated mature cerebral cortex from fragile X patients exhibits long, thin, tortuous postsynaptic spines resembling spines observed during normal early neocortical development. Here we describe dendritic spines in Golgi-impregnated cerebral cortex of transgenic fragile X gene (Fmr1) knockout mice that lack expression of the protein. Dendritic spines on apical dendrites of layer V pyramidal cells in occipital cortex of fragile X knockout mice were longer than those in wild-type mice and were often thin and tortuous, paralleling the human syndrome and suggesting that FMRP expression is required for normal spine morphological development. Moreover, spine density along the apical dendrite was greater in the knockout mice, which may reflect impaired developmental organizational processes of synapse stabilization and elimination or pruning.

Tomato SP-Interacting Proteins Define a Conserved Signaling System That Regulates Shoot Architecture and Flowering

Pnueli, Lilac; Gutfinger, Tamar; Hareven, Dana; Ben-Naim, Orna; Ron, Neta; Adir, Noam; Lifschitz, Eliezer
Fonte: American Society of Plant Biologists Publicador: American Society of Plant Biologists
Tipo: Artigo de Revista Científica
Publicado em /12/2001 EN
Relevância na Pesquisa
16.06%
Divergent architecture of shoot models in flowering plants reflects the pattern of production of vegetative and reproductive organs from the apical meristem. The SELF-PRUNING (SP) gene of tomato is a member of a novel CETS family of regulatory genes (CEN, TFL1, and FT) that controls this process. We have identified and describe here several proteins that interact with SP (SIPs) and with its homologs from other species: a NIMA-like kinase (SPAK), a bZIP factor, a novel 10-kD protein, and 14-3-3 isoforms. SPAK, by analogy with Raf1, has two potential binding sites for 14-3-3 proteins, one of which is shared with SP. Surprisingly, overexpression of 14-3-3 proteins partially ameliorates the effect of the sp mutation. Analysis of the binding potential of chosen mutant SP variants, in relation to conformational features known to be conserved in this new family of regulatory proteins, suggests that associations with other proteins are required for the biological function of SP and that ligand binding and protein–protein association domains of SP may be separated. We suggest that CETS genes encode a family of modulator proteins with the potential to interact with a variety of signaling proteins in a manner analogous to that of 14-3-3 proteins.

The flowering hormone florigen functions as a general systemic regulator of growth and termination

Shalit, Akiva; Rozman, Alexander; Goldshmidt, Alexander; Alvarez, John P.; Bowman, John L.; Eshed, Yuval; Lifschitz, Eliezer
Fonte: National Academy of Sciences Publicador: National Academy of Sciences
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
16.23%
The florigen paradigm implies a universal flowering-inducing hormone that is common to all flowering plants. Recent work identified FT orthologues as originators of florigen and their polypeptides as the likely systemic agent. However, the developmental processes targeted by florigen remained unknown. Here we identify local balances between SINGLE FLOWER TRUSS (SFT), the tomato precursor of florigen, and SELF-PRUNING (SP), a potent SFT-dependent SFT inhibitor as prime targets of mobile florigen. The graft-transmissible impacts of florigen on organ-specific traits in perennial tomato show that in addition to import by shoot apical meristems, florigen is imported by organs in which SFT is already expressed. By modulating local SFT/SP balances, florigen confers differential flowering responses of primary and secondary apical meristems, regulates the reiterative growth and termination cycles typical of perennial plants, accelerates leaf maturation, and influences the complexity of compound leaves, the growth of stems and the formation of abscission zones. Florigen is thus established as a plant protein functioning as a general growth hormone. Developmental interactions and a phylogenetic analysis suggest that the SFT/SP regulatory hierarchy is a recent evolutionary innovation unique to flowering plants.

Inhibition of Auxin Transport from the Ovary or from the Apical Shoot Induces Parthenocarpic Fruit-Set in Tomato Mediated by Gibberellins1[C][W]

Serrani, Juan Carlos; Carrera, Esther; Ruiz-Rivero, Omar; Gallego-Giraldo, Lina; Peres, Lázaro Eustáquio Pereira; García-Martínez, José Luis
Fonte: American Society of Plant Biologists Publicador: American Society of Plant Biologists
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
26.37%
Fruit-set in tomato (Solanum lycopersicum) depends on gibberellins and auxins (GAs). Here, we show, using the cv MicroTom, that application of N-1-naphthylphthalamic acid (NPA; an inhibitor of auxin transport) to unpollinated ovaries induced parthenocarpic fruit-set, associated with an increase of indole-3-acetic acid (IAA) content, and that this effect was negated by paclobutrazol (an inhibitor of GA biosynthesis). NPA-induced ovaries contained higher content of GA1 (an active GA) and transcripts of GA biosynthetic genes (SlCPS, SlGA20ox1, and -2). Interestingly, application of NPA to pollinated ovaries prevented their growth, potentially due to supraoptimal IAA accumulation. Plant decapitation and inhibition of auxin transport by NPA from the apical shoot also induced parthenocarpic fruit growth of unpollinated ovaries. Application of IAA to the severed stump negated the plant decapitation effect, indicating that the apical shoot prevents unpollinated ovary growth through IAA transport. Parthenocarpic fruit growth induced by plant decapitation was associated with high levels of GA1 and was counteracted by paclobutrazol treatment. Plant decapitation also produced changes in transcript levels of genes encoding enzymes of GA biosynthesis (SlCPS and SlGA20ox1) in the ovary...

Extinction procedure induces pruning of dendritic spines in CA1 hippocampal field depending on strength of training in rats

Garín-Aguilar, María E.; Díaz-Cintra, Sofía; Quirarte, Gina L.; Aguilar-Vázquez, Azucena; Medina, Andrea C.; Prado-Alcalá, Roberto A.
Fonte: Frontiers Media S.A. Publicador: Frontiers Media S.A.
Tipo: Artigo de Revista Científica
Publicado em 16/03/2012 EN
Relevância na Pesquisa
26.65%
Numerous reports indicate that learning and memory of conditioned responses are accompanied by genesis of dendritic spines in the hippocampus, although there is a conspicuous lack of information regarding spine modifications after behavioral extinction. There is ample evidence that treatments that typically produce amnesia become innocuous when animals are submitted to a procedure of enhanced training. We now report that extinction of inhibitory avoidance (IA), trained with relatively low foot-shock intensities, induces pruning of dendritic spines along the length of the apical dendrites of hippocampal CA1 neurons. When animals are trained with a relatively high foot-shock there is a high resistance to extinction, and pruning in the proximal and medial segments of the apical dendrite are seen, while spine count in the distal dendrite remains normal. These results indicate that pruning is involved in behavioral extinction, while maintenance of spines is a probable mechanism that mediates the protecting effect against amnesic treatments produced by enhanced training.

Desinfestação superficial de explantes isolados de ramos semilenhosos e herbáceos de Eugenia involucrata DC. (Myrtaceae); Superficial disinfestation of isolated explants from semi-hardwood and herbaceous branches of Eugenia involucrate DC. (Myrtaceae)

Fonte: UFLA - Universidade Federal de Lavras Publicador: UFLA - Universidade Federal de Lavras
Tipo: Artigo de Revista Científica Formato: text/html
PT
Relevância na Pesquisa
16.23%
This study aimed to compare two methods of surface disinfestation of explants isolated from semi-hardwood and herbaceous branches of Eugenia involucrata DC. (Myrtaceae) to obtain aseptic cultures. The better control of bacterial contamination in nodal segments from semi-hardwood branches was obtained by immersion for 25 minutes in sodium hypochloride at 1.5%. However, 39.35% of explants showed bacterial colonies and excessive contamination made it impossible the cultures. Apical and nodal shoot segments derived from herbaceous branches did not differ and showed reduced fungal contamination (13.75%) and bacterial contamination (0.41%), and high in vitro establishment (91.92%). Sodium hypochlorite at 1.5% in the time tested is not efficient in promoting surface disinfestation of nodal segments that already present woody aspects. It is possible to obtain aseptic cultures of E. involucrata for growing shoot apical and nodal segments obtained after the pruning, and sterilized with the aid of mercuric chloride and sodium hypochlorite.; No presente trabalho, objetivou-se comparar duas metodologias de desinfestação superficial de explantes isolados de ramos semilenhosos e herbáceos de Eugenia involucrata DC. (Myrtaceae), visando à obtenção de cultivos assépticos. O melhor controle da contaminação bacteriana nos segmentos nodais provenientes de ramos semilenhosos foi obtido pela imersão...

Layer 5 Pyramidal Neurons' Dendritic Remodeling and Increased Microglial Density in Primary Motor Cortex in a Murine Model of Facial Paralysis

Urrego, Diana; Troncoso, Julieta; Múnera, Alejandro
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
16.06%
This work was aimed at characterizing structural changes in primary motor cortex layer 5 pyramidal neurons and their relationship with microglial density induced by facial nerve lesion using a murine facial paralysis model. Adult transgenic mice, expressing green fluorescent protein in microglia and yellow fluorescent protein in projecting neurons, were submitted to either unilateral section of the facial nerve or sham surgery. Injured animals were sacrificed either 1 or 3weeks after surgery. Two-photon excitation microscopy was then used for evaluating both layer 5 pyramidal neurons and microglia in vibrissal primary motor cortex (vM1). It was found that facial nerve lesion induced long-lasting changes in the dendritic morphology of vM1 layer 5 pyramidal neurons and in their surrounding microglia. Dendritic arborization of the pyramidal cells underwent overall shrinkage. Apical dendrites suffered transient shortening while basal dendrites displayed sustained shortening. Moreover, dendrites suffered transient spine pruning. Significantly higher microglial cell density was found surrounding vM1 layer 5 pyramidal neurons after facial nerve lesion with morphological bias towards the activated phenotype. These results suggest that facial nerve lesions elicit active dendrite remodeling due to pyramidal neuron and microglia interaction...

Spatial embedding of neuronal trees modeled by diffusive growth

Luczak, Artur
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 14/05/2006
Relevância na Pesquisa
16.06%
The relative importance of the intrinsic and extrinsic factors determining the variety of geometric shapes exhibited by dendritic trees remains unclear. This question was addressed by developing a model of the growth of dendritic trees based on diffusion-limited aggregation process. The model reproduces diverse neuronal shapes (i.e., granule cells, Purkinje cells, the basal and apical dendrites of pyramidal cells, and the axonal trees of interneurons) by changing only the size of the growth area, the time span of pruning, and the spatial concentration of 'neurotrophic particles'. Moreover, the presented model shows how competition between neurons can affect the shape of the dendritic trees. The model reveals that the creation of complex (but reproducible) dendrite-like trees does not require precise guidance or an intrinsic plan of the dendrite geometry. Instead, basic environmental factors and the simple rules of diffusive growth adequately account for the spatial embedding of different types of dendrites observed in the cortex. An example demonstrating the broad applicability of the algorithm to model diverse types of tree structures is also presented. Key words: Diffusion-limited aggregation; Neuronal morphology; Dendrites; Growth model; tree; dendritic geometry.; Comment: 9 pages...

Ação de calciocianamida e alzodef na época de brotação e produtividade da videira 'Niagara Rosada'; Effects of calcium cyanamide and alzodef on bud breack and yield of 'Niagara Rosada' grape

Pires, Erasmo J.P.; Castro, Paulo R.C.; Demétrio, Clarice G.B.
Fonte: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Publicador: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/01/1985 POR
Relevância na Pesquisa
16.23%
Este ensaio foi realizado com o objetivo de determinar o efeito de calciocianamida e Alzodef na quebra de dormência das gemas da videira 'Niagara Rosada'. O controle da brotação da videira pode possibilitar a produção de uvas nas diferentes épocas do ano. Em 28 de outubro, na regiãode Jundiaí, duas horas depois da poda, aplicou-se calciocianamida 20% através de pincelamento da região apical do ramo, calciocianamida 20% pincelada sobre o corte da poda, pulverização com Alzodef 2% e com Alzodef 5% sobre a região apical do ramo , além do controle. Verificou-se que Alzodef 2% promoveu maior precocidade na emergência das gemas da videira 'Niagara Rosada'. Pincelamento do ramo ou do corte da poda com calciocianamida 20% e pulverização com Alzodef 2% e 5%promoveram quebra da dormência das gemas. Os produtos químicos aplicados não afetaram significati vãmente o número de panículas nem o peso das panículas na colheita.; In an experiment carried out in Jundiaí, São Paulo State, it was studied the possibility of termination of rest in plant buds by treatment with chemicals. The control of bud sprouting in the vineyard is important to pre vent chilling effects and to increase grape harvesting period. At October, 28, two hours after pruning...

Effect of deformation and root pruning of eucalyptus cuttlings on the growth in the field.; EFEITO DE DEFORMAÇÃO E PODA DAS RAÍZES DE MUDAS DE EUCALIPTO SOBRE O CRESCIMENTO NO CAMPO

Freitas, Teresa Aparecida Soares de; UFRB; Barroso, Deborah Guerra; UENF; Carneiro, José Geraldo de Araújo; UENF; Penchel Filho, Ricardo Miguel; Aracruz Celulose; Souza, Leonardo Silva
Fonte: FUPEF DO PARANÁ Publicador: FUPEF DO PARANÁ
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Artigo Avaliado pelos Pares Formato: application/pdf
Publicado em 16/06/2009 POR
Relevância na Pesquisa
26.7%
The effect of root deformation (bends, spiraling and strangling) and root pruning in two clones (11 and 20) of Eucalyptus grandis x E. urophylla grown in tubes were evaluated. The cuttings were graded in three classes: 0 (absence of deformation); 1 (presence of 1 to 3 deformations) and 2 (4 to 6 deformations). The cuttings were submitted to pruning: apical (removal of 3 cm of the clod botton), lateral (removal of 2mm of the surface of the clod) and pruning absence. In the field the experiment was set up according to the Randomized Block Design, with 4 replicates with 20 seedlings. The plants were evaluated in height (2, 3, 9 and 14 months), diameter at the ground level (2 and 3 months) and DHC (9 and 14 months). Nine and 14 months after the planting, dry mass of the stem (MSPA) and dry root mass (MSSR) where evaluated. The results showed no difference in height growth, diameter and biomass production of the plants. The clone 11 presented higher production of dry mass of the root system, leaves and branches. No difference was found out in wood and bark production between the clones. The application of pruning in the roots seedlings didn't stimulate the growth differentiated in relation to the not pruned, independent of the observed deformations.; Avaliaram-se o efeito de deformações (dobra...

EXPRESSION OF BUD FERTILITY OF GRAPEVINE IN FUNCTION OF DIFFERENT PRUNING TIMES AND DOSES OF NITROGEN; EXPRESSÃO DA FERTILIDADE DE GEMAS DA VIDEIRA EM FUNÇÃO DE DIFERENTES ÉPOCAS DE PODA E DOSES DE NITROGÊNIO

Carvalho, Ruy Inacio Neiva de; Pontifícia Universidade Católica do Paraná; Simões, Fabiano; FAEM-UFPel
Fonte: UFPR Publicador: UFPR
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Artigo Avaliado pelos Pares Formato: application/pdf
Publicado em 24/01/2007 ENG
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The culture treatment applied in the grapevine interferes in vegetative and reproductive growth of new grapevine branches.The period of pruning and doses of nitrogen fertilizer before of natural sprout can modify the vegetative growth and the expression of fertility of grapevine’s buds. The objective of this work was to evaluate this expression in function of different periods of pruning and doses of nitrogen. The technical of pruning utilized in ‘Niagara Rosada’ grapevines was the short hibernal pruning, where two buds were left in the branches (basal and apical), realized in three differents period (early, intermediate and later), associated with nitrogen fertilizer with 0, 50 and 100 g of N per plant. The number of bunch per bud, percentage of damaged buds, percentage of dormant buds, percentage of inhibition of buds fertility and vigor of new branches were evaluated. The real fertility was evaluated in laboratory and compared with the fertility express in field. The best expression of buds fertility occurred with the intermediated pruning without fertilizer and early pruning with 50 g N per plant for the production of bunch in branches originated from the basal bud of the prunned branch. The later pruning with 100 g of N per plant stimulated the production of bunch in branches originated from the apical bud of the prunned branch.; Os tratos culturais aplicados ao vinhedo interferem no crescimento vegetativo e reprodutivo de ramos novos da videira. Aépoca de poda e a dose de nitrogênio aplicada antes da brotação natural podem modificar o crescimento vegetativo e a expressão dafertilidade de gemas da videira. Este trabalho teve como objetivo avaliar essa expressão em função de diferentes épocas de poda edoses de nitrogênio. Foi realizada a poda curta hibernal em videiras da cultivar Niagara Rosada...

Sustainable management and use of a medicinal emblematic plant in Chile: Buddleja globosa Hope

Wilckens,P; Fernández,MP; Gómez,M; Peña,I; Montenegro,G
Fonte: Phyton (Buenos Aires) Publicador: Phyton (Buenos Aires)
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2013 EN
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Buddleja globosa Hope is a well-known native, medicinal plant because of its digestive and cicatrizing properties. Due to the increasing domestic and international demand, B. globosa abundance and distribution in Chile has resulted in the intensive exploitation of the plant's natural habitat, without consideration of the plant's regenerative capacity. The main objective of this research was to establish the B. globosa growth cycle and model its regeneration cycle. This would allow for more productive, efficient and sustainable use and management of this species, thus ensuring its long-term conservation. We selected two study sites, one wild and another one cultivated. In each one, ten individuals were marked as control treatments, for further observations, in order to quantify the monthly growth dynamics. Fifteen plants selected at random were marked in each site under study to know the regeneration rates with three pruning methods: apical, medium and basal (5 plants per treatment). The results showed significant differences between the control and management treatments on plants grown in the valley, and among the wild plants of the mountains. The biomass growth rates achieved in the treatments of pruning, and the period that those were maximum at both sites...