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Id: biblio-1285549
Autor: Silva, Carla Maria de Jesus; Biotechnology LaboratoryDias, Rita de Cássia Souza; Biotechnology LaboratoryMelo, Natoniel Franklin de.
Título: The Effect of Temperature and Growth Regulators on Callus Induction in Watermelon Anthers
Fonte: Braz. arch. biol. technol;64:e21180505, 2021. tab, graf.
Idioma: en.
Resumo: HIGHLIGHTS Callogenesis was induced from watermelon anthers The auxin 2,4-D at 2.0 and 5.0 μM concentrations induced callus formation. Anthers' responses to the pre-treatment at 4 °C varied according to the watermelon genotype.

Abstract Callus induction is one of the pathways required for haploid plant regeneration through anther culture. Pollen viability, as well as the effect of growth regulators and cold pretreatment on anthers of two watermelon lines (Smile and Sugar Baby) to induce callus formation were herein evaluated. Pollen viability was estimated through the staining technique using 2% acetic carmine. Male flower buds were collected and disinfested to allow removal anthers. These anthers were placed on Murashige and Skoog medium, which was supplemented with 2,4-dichlorophenoxyacetic (2,4-D) at 0.0, 0.5, 1.0, 2.0 or 5.0 μM or with 6-benzylaminopurine at 0.0, 0.5, 1.0, 1.5, or 2.0 μM, in combination with 2.0 μM of 2,4-dichlorophenoxyacetic. Anthers were pretreated at 4 °C, for two days and then placed in vitro. Both watermelon lines provided high pollen viability rates (from 93 to 98%). The 2.0 and 5.0 μM concentrations of 2,4-D stimulated higher friable callus formation. The optimal concentration of 2,4-D was estimated at 3.78 μM and 4.17 μM, which had callus induction rates of 64% and 52%, respectively. The combination of 2.0 μM of 2,4-D and 6-benzylaminopurine did not lead to increased anther response to callus induction. The pre-treatment applied to flower buds at 4 °C enabled callus induction and the anther response to callus induction was genotype-dependent.
Descritores: Reguladores de Crescimento de Plantas
Pólen
Citrullus
-Genótipo
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-1047373
Autor: Shi, Xiaodong; Wu, Yan; Dai, Tingwei; Gu, Yuxi; Wang, Linghui; Qin, Xiaobo; Xu, Ying; Chen, Fang.
Título: JcZFP8, a C2H2 zinc finger protein gene from Jatropha curcas, influences plant development in transgenic tobacco
Fonte: Electron. j. biotechnol;34:76-82, july. 2018. ilus, graf.
Idioma: en.
Projeto: National Key Technology R&D Program of 12th Five-Year Plan of China; . Open Foundation of Key Laboratory of Molecular Genetics, China National Tobacco Corporation (Guizhou Academy of Tobacco Science); . Special Project for Breeding and Cultivation of GMO Varieties of Ministry of Agriculture.
Resumo: Background: Jatropha curcas L., as an important strategic biofuel resource with considerable economic potential, has attracted worldwide attention. However, J. curcas has yet to be domesticated. Plant height, an important agronomic trait of J. curcas, has not been sufficiently improved, and the genetic regulation of this trait in J. curcas is not fully understood. Zinc finger proteins (ZFPs), a class of transcription factors, have previously been shown to play critical roles in regulating multiple aspects of plant growth and development and may accordingly be implicated in the genetic regulation of plant height in J. curcas. Results: In this study, we cloned JcZFP8, a C2H2 ZFP gene in J. curcas. We found that the JcZFP8 protein was localized in the nucleus and contained a conserved QALGGH motif in its C2H2 structure. Furthermore, ectopic expression of JcZFP8 under the control of the 35S promoter in transgenic tobacco resulted in dwarf plants with malformed leaves. However, when JcZFP8 was knocked out, the transgenic tobacco did not show the dwarf phenotype. After treatment with the gibberellic acid (GA) biosynthesis inhibitor paclobutrazol (PAC), the dwarf phenotype was more severe than plants that did not receive the PAC treatment, whereas application of exogenous gibberellin3 (GA3) reduced the dwarf phenotype in transgenic plants. Conclusions: The results of this study indicate that JcZFP8 may play a role in J. curcas plant phenotype through GA-related pathways. Our findings may help us to understand the genetic regulation of plant development in J. curcas and to accelerate breeding progress through engineering of the GA metabolic pathway in this plant. How to cite: Shi X,Wu Y, Dai T, et al. JcZFP8, a C2H2 zinc-finger protein gene from Jatropha curcas, influences plant development in transgenic tobacco.
Descritores: Tabaco/genética
Jatropha
Desenvolvimento Vegetal
Dedos de Zinco CYS2-HIS2/genética
-Reguladores de Crescimento de Plantas/genética
Fatores de Transcrição
Triazóis
Plantas Geneticamente Modificadas/crescimento & desenvolvimento
Clonagem Molecular
Regulação da Expressão Gênica de Plantas
Reação em Cadeia da Polimerase em Tempo Real
Giberelinas
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1088987
Autor: Mollashahi, Mahtab; Abbasnejad, Mehdi; Esmaeili-Mahani, Saeed.
Título: Spinal protein kinase A and phosphorylated extracellular signal-regulated kinase signaling are involved in the antinociceptive effect of phytohormone abscisic acid in rats / A proteína quinase A da medula espinhal e a sinalização da quinase fosforilada regulada por sinal extracelular estão envolvidas no efeito antinociceptivo do ácido fito-hormônio abscísico em ratos
Fonte: Arq. neuropsiquiatr;78(1):21-27, Jan. 2020. graf.
Idioma: en.
Projeto: Kerman Neuroscience Research Center.
Resumo: Abstract Objective: The phytohormone abscisic acid (ABA) as a signaling molecule exists in various types of organisms from early multicellular to animal cells and tissues. It has been demonstrated that ABA has an antinociceptive effect in rodents. The present study was designed to assess the possible role of PKA and phosphorylated ERK (p-ERK) on the antinociceptive effects of intrathecal (i.t.) ABA in male Wistar rats. Methods: The animals were cannulated intrathecally and divided into different experimental groups (n=6‒7): Control (no surgery), vehicle (received ABA vehicle), ABA-treated groups (received ABA in doses of 10 or 20 µg/rat), ABA plus H.89 (PKA inhibitor)-treated group which received the inhibitor 15 min prior to the ABA injection. Tail-flick and hot-plate tests were used as acute nociceptive stimulators to assess ABA analgesic effects. p-ERK was evaluated in the dorsal portion of the spinal cord using immunoblotting. Results: Data showed that a microinjection of ABA (10 and 20 µg/rat, i.t.) significantly increased the nociceptive threshold in tail flick and hot plate tests. The application of PKA inhibitor (H.89, 100 nM/rat) significantly inhibited ABA-induced analgesic effects. Expression of p-ERK was significantly decreased in ABA-injected animals, which were not observed in the ABA+H.89-treated group. Conclusions: Overall, i.t. administration of ABA (10 µg/rat) induced analgesia and p-ERK down-expression likely by involving the PKA-dependent mechanism.

Resumo Objetivo: O ácido fito-hormônio abscísico (ABA) existe como molécula sinalizadora em vários tipos de organismos, de multicelulares a células e tecidos animais. Foi demonstrado que o ABA tem efeito antinociceptivo em roedores. O presente estudo foi desenhado para avaliar o possível papel da PKA e da ERK fosforilada (p-ERK) nos efeitos antinociceptivos do ABA intratecal (i.t.) em ratos Wistar machos. Métodos: Os animais foram canulados por via i.t. e divididos em diferentes grupos experimentais (n=6‒7): controle (sem cirurgia), veículo (veículo ABA recebido), grupos tratados com ABA (recebeu ABA em doses de 10 ou 20 µg/rato), grupo tratado com ABA mais H.89 (inibidor de PKA) que recebeu o inibidor 15 minutos antes da injeção de ABA. Os testes de movimento da cauda e placa quente foram utilizados como estimuladores nociceptivos agudos para avaliar os efeitos analgésicos da ABA. A p-ERK foi avaliada na porção dorsal da medula espinhal por imunotransferência. Resultados: A microinjeção de ABA (10 e 20 µg/rato, i.t.) aumentou significativamente o limiar nociceptivo nos testes de movimento da cauda e placa quente. A aplicação de inibidor de PKA (H.89, 100 nM/rato) inibiu significativamente os efeitos analgésicos induzidos por ABA. A expressão de p-ERK diminuiu significativamente em animais injetados com ABA que não foram observados no grupo tratado com ABA+H.89. Conclusões: No geral, a administração i.t. de ABA (10 µg/rato) induziu a analgesia e expressão negativa de p-ERK provavelmente envolvendo mecanismo dependente de PKA.
Descritores: Reguladores de Crescimento de Plantas/farmacologia
Medula Espinal/metabolismo
Ácido Abscísico/farmacologia
Proteínas Quinases Dependentes de AMP Cíclico/efeitos dos fármacos
MAP Quinases Reguladas por Sinal Extracelular/efeitos dos fármacos
Analgésicos/farmacologia
-Valores de Referência
Medula Espinal/efeitos dos fármacos
Fatores de Tempo
Western Blotting
Reprodutibilidade dos Testes
Ratos Wistar
Proteínas Quinases Dependentes de AMP Cíclico/análise
MAP Quinases Reguladas por Sinal Extracelular/análise
Peptídeos e Proteínas de Sinalização Intracelular/farmacologia
Limites: Animais
Masculino
Responsável: BR1.1 - BIREME


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Id: biblio-1129392
Autor: Oliveira, Carlos Vinício Prescinato de; Gigliolli, Adriana Aparecida Sinópolis; Galhardo, Douglas; Moreira, Daiani Rodrigues; Ronqui, Ludimilla; Santos, Simone Aparecida; Toledo, Vagner Alencar Arnault; Ruvolo-Takasusuki, Maria Claudia Colla.
Título: Effects of biopesticides in Tetragonisca angustula latreille (Hymenoptera: Meliponinae) pollinators / Efeitos de biopesticidas em polinizadores Tetragonisca angustula latreille (Hymenoptera: Meliponinae) / Efectos de los bioplaguicidas sobre los polinizadores Tetragonisca angustula latreille (Hymenoptera: Meliponinae)
Fonte: Arq. Ciênc. Vet. Zool. UNIPAR (Online);23(2, cont.):e2301, jul-dez. 2020. tab, graf.
Idioma: en.
Resumo: Stingless bees Tetragonisca angustula (Latreille) (Hymenoptera: Meliponinae) are pollinators of native and cultivated plants and are therefore in contact with areas contaminated by pesticides. These native bees were evaluated for changes in gene expression of esterase isoenzymes (EST) and peptides after contamination by contact with growth regulators from insecticides Gallaxy® EC 100, Natuneem and Azamax after 48, 120, 168 hours, 30 and 60 days. EST-4 presented an increase in relative activity after contamination with Gallaxy® EC 100 at 6.2 × 10-2 g a.i./mL; Natuneem at 7.5 × 10-5 g a.i./mL; and Azamax at 1.2 × 10-3 g a.i/mL after 60 days, 48 h, and 60 days, respectively. Inhibition of the relative activity of EST-4 was detected after contamination by Natuneem at 1.5 × 10-5 g a.i./mL and Azamax at 1.2 × 10-3 g a.i./mL after 48 h and 30 days, respectively. The insecticide growth regulators promoted changes in protein synthesis of T. angustula adult workers resulting in an increase or decrease in the relative intensity of bands, and the appearance of new peptides when compared with controls. Changes in protein synthesis have been identified mainly after long period of contamination, 120 and 168 h with the IGRs Gallaxy® EC 100 (at 0.78 and 1.25 g a.i./mL), Azamax (at 1.2 × 10-3 and 6 × 10-3 g a.i./mL), and Natuneem (at 7.5 × 10-5 and 3 × 10-3 g a.i./mL), and at 60 days with Natuneem (at 1.5 × 10-5 g a.i./mL).(AU)

Abelhas sem ferrão Tetragonisca angustula (Latreille) (Hymenoptera: Meliponinae) são polinizadores de plantas nativas e cultivadas e, portanto, estão em contato com áreas contaminadas por biopesticidas. Essas abelhas nativas foram avaliadas quanto a alterações na expressão gênica de isoenzimas esterases (EST) e peptídeos após contaminação por contato com reguladores de crescimento de inseticidas Gallaxy® EC 100, Natuneem e Azamax após 48, 120, 168 horas, 30 e 60 dias. A EST-4 apresentou um aumento na atividade relativa após a contaminação com Gallaxy® 100 EC em 6,2 × 10-2 g i.a./mL, Natuneem em 7,5 × 10-5 g i.a./mL e Azamax em 1,2 × 10-3 g i.a./mL após 60 dias, 48 h e 60 dias, respectivamente. A inibição da atividade relativa de EST-4 foi detectada após contaminação pelo Natuneem a 1,5 × 10-5 g i.a./mL e Azamax a 1,2 × 10-3 g i.a./mL após 48 he 30 dias, respectivamente. Os reguladores de crescimento de inseticidas promoveram alterações na síntese protéica de trabalhadores adultos de T. angustula, resultando em um aumento ou diminuição da intensidade relativa das bandas e no aparecimento de novos peptídeos em comparação com os controles. Alterações na síntese de proteínas foram identificadas principalmente após um longo período de contaminação, 120 e 168 h com o IGRs Gallaxy® EC 100 (0,78 e 1,25 g i.a./mL), Azamax (1,2 × 10-3 e 6 × 10-3 g i.a./mL) e Natuneem (7,5 × 10-5 e 3 × 10-3 g i.a./mL) e 60 dias com Natuneem (1,5 × 10-5 g i.a./mL).(AU)

Las abejas sin aguijón Tetragonisca angustula (Latreille) (Hymenoptera: Meliponinae) son polinizadores de plantas nativas y cultivadas y, por lo tanto, están en contacto con áreas contaminadas por bioplaguicidas. Estas abejas nativas fueron evaluadas para detectar cambios en la expresión génica de isoenzimas esterasa (EST) y péptidos después de la contaminación por contacto con los reguladores del crecimiento insecticidas Gallaxy® EC 100, Natuneem y Azamax después de 48, 120, 168 horas, 30 y 60 días. EST-4 mostró un aumento en la actividad relativa después de la contaminación con Gallaxy® 100 EC a 6.2 × 10-2 g i.a./mL, Natuneem a 7.5 × 10-5 g i.a./mL y Azamax a 1.2 × 10-3 g i.a./mL después de 60 días, 48 hy 60 días, respectivamente. La inhibición de la actividad relativa de EST-4 se detectó después de la contaminación por Natuneem a 1.5 × 10-5 g i.a./mL y Azamax a 1.2 × 10-3 g i.a./mL después de 48 hy 30 días. respectivamente. Los insecticidas reguladores del crecimiento promovieron cambios en la síntesis de proteínas de trabajadores adultos de T. angustula, resultando en un aumento o disminución de la intensidad relativa de las bandas y en la aparición de nuevos péptidos en relación a los controles. Los cambios en la síntesis de proteínas se identificaron principalmente después de un largo período de contaminación, 120 y 168 h con IGRs Gallaxy® EC 100 (0.78 y 1.25 g i.a./mL), Azamax (1.2 × 10-3 y 6 × 10-3 g i.a./mL) y Natuneem (7.5 × 10-5 y 3 × 10-3 g i.a./mL) y 60 días con Natuneem (1.5 × 10-5 g i.a./mL).(AU)
Descritores: Peptídeos
Reguladores de Crescimento de Plantas
Abelhas
Esterases
Inseticidas
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-1011433
Autor: Isah, Tasiu.
Título: De novo in vitro shoot morphogenesis from shoot tip-induced callus cultures of Gymnema sylvestre (Retz.) R. Br. ex Sm
Fonte: Biol. Res;52:3, 2019. tab, graf.
Idioma: en.
Resumo: BACKGROUND: Gymnema sylvestre is a medicinal woody perennial vine known for its sweetening properties and antidiabetic therapeutic uses in the modern and traditional medicines. Its over-exploitation for the therapeutic uses and to meet the demand of pharmaceutical industry in raw materials supply for the production of anti-diabetic drugs has led to considerable decline in its natural population. RESULTS: An efficient system of shoot bud sprouting from nodal segment explants and indirect plant regeneration from apical meristem-induced callus cultures of G. sylvestre have been developed on Murashige and Skoog (MS) medium amended with concentrations of cytokinins. Of the three growth regulators tested, N6-benzylaminopurine (BAP) was the most efficient and 2.0 mg L-1 gave the best shoot formation efficiency. This was followed by thidiazuron (TDZ) and kinetin (Kin) but, most of the TDZ-induced micro shoots showed stunted growth. Multiple shoot formation was observed on medium amended with BAP or TDZ at higher concentrations. The produced micro shoots were rooted on half strength MS medium amended with auxins and rooted plantlets acclimatized with 87% survival of the regenerates. CONCLUSIONS: The developed regeneration system can be exploited for genetic transformation studies, particularly when aimed at producing its high yielding cell lines for the anti-diabetic phytochemicals. It also offers opportunities for exploring the expression of totipotency in the anti-diabetic perennial vine.
Descritores: Reguladores de Crescimento de Plantas/farmacologia
Regeneração/efeitos dos fármacos
Brotos de Planta/crescimento & desenvolvimento
Gymnema sylvestre/crescimento & desenvolvimento
Morfogênese/efeitos dos fármacos
-Compostos de Fenilureia/farmacologia
Purinas/farmacologia
Tiadiazóis/farmacologia
Compostos de Benzil/farmacologia
Brotos de Planta/efeitos dos fármacos
Gymnema sylvestre/efeitos dos fármacos
Cinetina/farmacologia
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1053457
Autor: Suwanseree, Valerie; Phansiri, Salak; Yapwattanaphun, Chinawat.
Título: A comparison of callus induction in 4 Garcinia species
Fonte: Electron. j. biotechnol;40:45-51, July. 2019. ilus, tab.
Idioma: en.
Resumo: Background: This research is intended to determine suitable types and concentrations of plant growth regulators (PGRs) to induce callus on stem and leaf sections of 4 species of the genus Garcinia, namely, Garcinia mangostana, Garcinia schomburgkiana, Garcinia cowa, and Garcinia celebica. The base medium was MS medium containing 30 g l -1 sucrose, 0.5 g l-1 polyvinylpyrrolidone (PVP), and 7 g l-1 agar, and for the different treatments, PGRs were added to the medium as follows: thidiazuron (TDZ) at concentrations of 0, 0.1, 0.5, 1, and 2 mg l-1; 6-(3- hydroxybenzylamino) purine (meta-topolin) at concentrations of 0, 0.5, 2.5, and 5 mg l-1; 4-amino-3,5,6- trichloro-2-pyridinecarboxylic acid (picloram) at concentrations of 0, 0.5, 2.5, and 5 mg l-1; and 2,4- dichlorophenoxyacetic acid (2,4-D) at concentrations of 0, 0.5, 1, 2, and 4 mg l-1. The occurrence of callus was observed after 4 weeks. Results: A maximum of 100% and 93% of G. mangostana leaf explants formed callus in the 0.5 mg l-1 and 1 mg l-1 TDZ treatments, respectively, while 100% of G. schomburgkiana stem explants formed callus in the 1 mg l-1 TDZ treatment and 89% of G. schomburgkiana leaf explants formed callus in the 0.5 mg l-1 picloram treatment. The highest callus induction rate for G. cowa was 62% in the 1 mg l-1 TDZ treatment and for G. celebica was 56% in the 0.5 mg l-1•mT-1 treatment. Conclusions: For all 4 species, the greatest amount of large nodular callus was observed in the TDZ treatments. White, friable callus was observed on most of the 2,4-D and picloram treatment groups. Most meta-topolin treatments resulted in minimal callus formation.
Descritores: Reguladores de Crescimento de Plantas/metabolismo
Garcinia/crescimento & desenvolvimento
Compostos Fitoquímicos/metabolismo
-Compostos de Fenilureia
Tiadiazóis
Fatores de Tempo
Transformação Genética
Clusiaceae/crescimento & desenvolvimento
Garcinia/fisiologia
Técnicas de Cultura de Tecidos
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1019503
Autor: Isah, Tasiu.
Título: Stress and defense responses in plant secondary metabolites production
Fonte: Biol. Res;52:39, 2019. tab, graf.
Idioma: en.
Resumo: In the growth condition(s) of plants, numerous secondary metabolites (SMs) are produced by them to serve variety of cellular functions essential for physiological processes, and recent increasing evidences have implicated stress and defense response signaling in their production. The type and concentration(s) of secondary molecule(s) produced by a plant are determined by the species, genotype, physiology, developmental stage and environmental factors during growth. This suggests the physiological adaptive responses employed by various plant taxonomic groups in coping with the stress and defensive stimuli. The past recent decades had witnessed renewed interest to study abiotic factors that influence secondary metabolism during in vitro and in vivo growth of plants. Application of molecular biology tools and techniques are facilitating understanding the signaling processes and pathways involved in the SMs production at subcellular, cellular, organ and whole plant systems during in vivo and in vitro growth, with application in metabolic engineering of biosynthetic pathways intermediates.
Descritores: Reguladores de Crescimento de Plantas/metabolismo
Estresse Fisiológico/fisiologia
Fenômenos Fisiológicos Vegetais
Metabolismo Secundário/fisiologia
-Plantas/metabolismo
Transdução de Sinais
Brotos de Planta/metabolismo
Raízes de Plantas/metabolismo
Regulação da Expressão Gênica de Plantas/fisiologia
Técnicas de Cultura de Células
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1056793
Autor: Alcantara-Cortes, Johan Steven; Acero Godoy, Jovanna; Alcántara Cortés, Jonathan David; Sánchez Mora, Ruth Melida.
Título: Principales reguladores hormonales y sus interacciones en el crecimiento vegetal / Main hormonal regulators and their interactions in plant growth
Fonte: NOVA publ. cient;17(32):109-129, jul.-dic. 2019. tab, graf.
Idioma: es.
Resumo: Resumen Una hormona vegetal o fitohormona es un compuesto producido internamente por una planta, que ejerce su función en muy bajas concentraciones y cuyo principal efecto se produce a nivel celular, cambiando los patrones de crecimiento de los vegetales y permitiendo su control. Los reguladores vegetales son compuestos sintetizados químicamente u obtenidos de otros organismos y son, en general, mucho más potentes que los análogos naturales. Es necesario tener en cuenta aspectos críticos como oportunidad de aplicación, dosis, sensibilidad de la variedad, condición de la planta, etc., ya que cada planta requerirá de unas condiciones específicas de crecimiento que pueden afectarse por la concentración de ellos en el medio. Los reguladores vegetales son productos sintéticos que se han convertido en las primeras herramientas capaces de controlar el crecimiento y actividad bioquímica de las plantas por lo que su uso ha aumentado en los últimos años. Esta revisión busca hacer una recopilación bibliográfica de los primeros acontecimientos de la aplicación de los reguladores de crecimiento vegetal. Se presentan las principales características fisiológicas que pueden desarrollar la aplicación de estos sobre el crecimiento vegetal a nivel celular y su repercusión a nivel fenotípico; además, se describen las principales fitohormonas más conocidas en la aplicación biotecnológica. Entre ellas se encuentran auxinas, giberelinas, citoquininas, ácido abscísico, ácido salicílico, poliaminas, jasmonatos y derivados, brasinoesteroides, etileno y estrigolactonas. Se detallan las principales funciones a nivel del metabolismo vegetal y sus posibles interacciones intra e intercelular.

Abstract A vegetal hormone or phytohormone is a compound produced inside by a plant, that work in low concentrations and whose mainly effect occurs at the cellular level, changing the patterns of grow in vegetal organism and allow their control. The plant grows regulators are synthetic chemical compounds that can be obtained by the organism different to the plants and are more stronger that natural analogues, is necessary have in consideration different aspects like application opportunity, concentration, sensibility, plant condition, it's because every plant requires specific conditions of grow that can be affected by phytohormonal concentration in the soil or medium. The vegetal regulators are synthetic products that it has been converted in the mainly tool available to control the growing and biochemical activity of the plant and for that reason their use are increased in the last years. This review makes a bibliography compilation of the first events in the beginning of vegetal plant regulators application and presents the mainly physiologic characteristics that can be developed by application of vegetal hormones and their action in cellular and phenotypic response, furthermore we explain some of the mechanisms of action of the mainly ten phytohormones more knowledge in the biotechnological application: auxins, gibberellins, cytokinins, abscisic acid, salicylic acid, polyamines, jasmonates and derived compounds, brassinosteroids, ethylene, and strigolactones. We describe their mainly functions to vegetal metabolism and their possible interactions intracellular and extracellular.
Descritores: Reguladores de Crescimento de Plantas
-Bioquímica
Cultivos Agrícolas
Brotos de Planta
Desenvolvimento Vegetal
Crescimento
Tipo de Publ: Revisão
Responsável: CO242.1 - Biblioteca


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Id: lil-555567
Autor: Jardim, Lyana Silva; Sampaio, Paulo de Tarso Barbosa; Costa, Suely de Souza; Gonçalves, Cláudia de Queiroz Blair; Brandão, Hélio Leonardo Moura.
Título: Efeito de diferentes reguladores de crescimento na regeneração in vitro de pau-rosa (Aniba rosaeodora Ducke) / Effect of differents growth regulators in vitro propagation of Aniba rosaeodora Ducke
Fonte: Acta amaz;40(2):275-279, 2010. ilus, graf, tab.
Idioma: pt.
Resumo: O objetivo deste trabalho foi estabelecer um protocolo para a regeneração in vitro de pau-rosa (Aniba rosaeodora Ducke), utilizando brotações apicais e segmentos nodais inoculados em meio de cultura com distintas concentrações de diferentes reguladores de crescimento. Explantes esterilizados com soluções de benomyl (4,0 g.L-1) por 24 horas e hipoclorito de sódio a 20 por cento + tween 20 por 20 minutos, foram submetidos a um experimento de indução de broto, raiz e calo em meio MS1 acrescido de 30g.L-1 de sacarose e 9g.L-1 de agar, suplementado com BAP (0,0 e 4,0 mg.L-1), ANA, AIA e 2,4-D (0,0; 3,0 e 6,0 mg.L-1), e suas respectivas combinações. O delineamento utilizado foi o inteiramente casualizado em esquema fatorial 7 X 2, com 14 tratamentos e 15 repetições cada, onde foram analisados o número médio de brotos, raízes e calo. Após 90 dias, os resultados mostraram que a presença de auxinas é fundamental para a formação dos parâmetros induzidos nos explantes de pau-rosa. O meio de cultura contendo 4,0 mg.L-1 de BAP + 6,0 mg.L-1 de AIA apresentou a melhor média para a brotação com 2,13 brotos/explante. Para o enraizamento o meio contendo 3,0 mg.L-1 de ANA foi o mais eficiente, apresentando uma média de 2,53 raízes/explante. Em relação à indução de calo, todos os tratamentos apresentaram calogênese, porém o meio suplementado com 4,0 mg.L-1 de BAP + 6,0 mg.L-1 de 2,4-D, apresentou a melhor média, 1,67 calos/explante.

The objective of this work was to establish a protocol for in vitro regeneration of rosewood (Aniba rosaeodora Ducke), using apical and nodal segments inoculated in culture medium with various concentrations of growth regulators. Explants disinfected with solutions of benomyl (4,0 g.L-1) for 24 hours and sodium hipoclorite in 20 percent + tween 20 for 20 minutes were submitted in an experiment of shoot, root and callus induction in MS medium, with 30 g.L-1 of sucrose and 9,0 g.L-1 of agar added with the growth regulators: BAP (0,0 and 4,0 mg.L-1), ANA, AIA and 2,4-D (0,0; 3,0 and 6,0 mg.L-1), and their respective combinations. The design was complete randomized in arranged factorial 7 X 2, with 14 treatments and 15 replications, where about the explants were analysed the number of shoot, root and callus . After 90 days, the results showed that the presence of auxins is fundamental to induce buds, roots and callus . The medium was contained 4,0 mg.L-1 BAP + 6,0 mg.L-1 AIA showed the best average for shooting with 2,13 buds/explants. In the rooting, the medium was contained 3,0 mg.L-1 of ANA was the more efficient, showed 2,53 roots/explant. However, all the treatments obtained formation of callus, but the medium with 4,0 mg.L-1 BAP + 6,0 mg.L-1 2,4-D showed the best result,1.67 callus/explant.
Descritores: Reguladores de Crescimento de Plantas
Regeneração
Técnicas In Vitro
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde


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Id: biblio-886729
Autor: JAQUETTI, ROBERTO K; GONÇALVES, JOSÉ FRANCISCO C.
Título: Carbon and nutrient stocks of three Fabaceae trees used for forest restoration and subjected to fertilization in Amazonia
Fonte: An. acad. bras. ciênc;89(3):1761-1771, July-Sept. 2017. tab, graf.
Idioma: en.
Resumo: ABSTRACT Amazonia is crucial to global carbon cycle. Deforestation continues to be one of the main causes of the release of C into the atmosphere, but forest restoration plantations can reverse this scenario. However, there is still diffuse information about the C and nutrient stocks in the vegetation biomass. We investigated the carbon and nutrient stocks of Fabaceae trees (Inga edulis, Schizolobium amazonicum and Dipteryx odorata) subjected to fertilization treatments (T1 - no fertilization; T2 - chemical; T3 - organic; and T4 - organic and chemical fertilization) in a degraded area of the Balbina Hydroelectric Dam, AM - Brazil. As an early successional species, I. edulis stocked more C and nutrients than the other two species independent of the fertilization treatment, and S. amazonicum stocked more C than D. odorata under T1 and T4. The mixed species plantation had the potential to stock 4.1 Mg C ha-1 year-1, while I. edulis alone could stock 9.4 Mg C ha-1 year-1. Mixing species that rapidly assimilate C and are of significant ecological and commercial value (e.g., Fabaceae trees) represents a good way to restore degraded areas. Our results suggest that the tested species be used for forest restoration in Amazonia.
Descritores: Reguladores de Crescimento de Plantas/farmacologia
Carbono/análise
Florestas
Conservação dos Recursos Naturais
Fabaceae/classificação
Fabaceae/efeitos dos fármacos
-Solo
Brasil
Biomassa
Fabaceae/química
Responsável: BR1.1 - BIREME



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