Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 14
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
AgNO3: a potential regulator of ethylene activity and plant growth modulator Electron. J. Biotechnol.
Kumar,Vinod; Parvatam,Giridhar; Ravishankar,Gokare Aswathanarayana.
The aim of this review is to critically analyze the role of silver nitrate (AgNO3) in modulating plant growth and development. In recent years, basic studies on ethylene regulation opened new vistas for applied research in the area of micro-propagation, somatic embryogenesis, in vitro flowering, growth promotion, fruit ripening, and sex expression. Silver nitrate has proved to be a very potent inhibitor of ethylene action and is widely used in plant tissue culture. Few properties of silver nitrate such as easy availability, solubility in water, specificity and stability make it very useful for various applications in exploiting plant growth regulation and morphogenesis in vivo and in vitro. Silver ion mediated responses seem to be involved in polyamines,...
Tipo: Journal article Palavras-chave: Calcium; Ethylene; Morphogenesis; Polyamines; Silver nitrate; Somatic embryogenesis.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000200008
Imagem não selecionada

Imprime registro no formato completo
Arginine metabolism in uricotelic species - doi: 10.4025/actascianimsci.v32i4.10990 Animal Sciences
Fernandes, Jovanir Inês Müller; Universidade Federal do Paraná; Murakami, Alice Eiko; UEM.
Due to the lack of a complete urea cycle, uricotelic species, such as broilers, are not able to synthesize de novo arginine (Arg), thus depending exclusively on dietary Arg. High levels of dietary lysine (Lys) increase the demand for Arg because of the antagonistic relationship between these amino acids. The Arg-Lys antagonism promotes an expressive increase in the renal Arg activity and consequently induces the degradation of Arg and the decrease in the activity of glycine amidinotransferase, an enzyme that uses Arg in the synthesis of muscle creatin. Arg is considered an important modulator of immunological and physiological processes. The degradation of Arg produces ornithine, a precursor of polyamines that are key to cell division, DNA synthesis, and...
Palavras-chave: Carbamoyl phosphatase synthetase; Creatine; Immune system; Nitric oxide; Polyamines; Urea cycle carbamoyl phosphatase synthetase; Creatine; Immune system; Nitric oxide; Polyamines; Urea cycle.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10990
Imagem não selecionada

Imprime registro no formato completo
Changes in polyamines content associated with zygotic embryogenesis in the Brazilian pine, Araucaria angustifolia (Bert.) O. Ktze. Rev. Bras. Bot.
Astarita,Landro V.; Handro,Walter; Floh,Eny I.S..
Changes in the polyamine content were analyzed in different embryo developmental stages and tissues during seed development in the conifer Araucaria angustifolia (Bert.) O. Ktze. Free polyamine contents varied according to the tissue and stage of embryo development, the highest levels occurring in the embryonic axis at the early stages, when putrescine and spermidine were most abundant. The levels of spermidine were higher from the stage where cotyledons arise, whereas putrescine decreases. The putrescine/spermine+spermidine ratio was higher during the initial phases of seed development, corresponding to cell multiplication and elongation, with a decrease in the final stages, corresponding to stabilization of the dry matter content.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Araucaria angustifolia; Embryogenesis; Polyamines.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000200003
Imagem não selecionada

Imprime registro no formato completo
Citocinina, piraclostrobina e putrescina: influência no desenvolvimento de mudas em três cultivares de videira. Repositório Alice
INOUE, R. C.; ONO, E. O.; BARBOSA, M. A. G.; QUEIROZ, M. A. de; TERAO, D.; WEBER, R. E. H.; RODRIGUES, J. D..
Este trabalho objetivou estudar a produção de mudas dos cultivares Niagara Rosada no ambiente de Botucatu, SP, Isabel Precoce e Thompson Seedless enxertadas sobre o porta-enxerto IAC 766, nos ambientes de Petrolina, PE e Juazeiro, BA utilizando-se os reguladores vegetais, poliaminas e citocininas (CK), e fungicida (piraclostrobina). Os tratamentos utilizados foram: T1- Testemunha (água); T2? Putrescina (Put, 2mM); T3? Citocinina (CK, 6-BA 20 mg L-1); T4? Piraclostrobina (Pira, 200 g 100 L-1); T5- Put + CK; T6- Put + Pira; T7- Pira + CK; T8- CKvia foliar (20 mg L-1) +via solo (40 mg L-1), com aplicações realizadas uma vez por semana, num total de três aplicações. Para verificar o efeito dos tratamentos avaliou-se a taxa de crescimento, o número de folhas,...
Tipo: Anais e Proceedings de eventos Palavras-chave: Poliaminas; 6-benzilaminopurina; Estrobirulinas; Crescimento vegetativo; Efeito fisiológico; Interação genótipo x ambiente; 6-benzylaminopurine; Strobilurins; Physiological effect; Uva; Muda; Estimulante de Crescimento Vegetal; Grapes; Growth regulators; Vegetative growth; Polyamines; Genotype-environment interaction.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1128870
Imagem não selecionada

Imprime registro no formato completo
Citocinina, piraclostrobina e putrescina: influência no desenvolvimento de mudas em três cultivares de videira em diferentes ambientes. Repositório Alice
CAMARGO, R. B..
Resumo: Este trabalho objetivou estudar a produção de mudas dos cultivares Niagara Rosada no ambiente de Botucatu, SP, Isabel Precoce e Thompson Seedless sobre o porta-enxerto?IAC 766?, nos ambientes de Petrolina, PE e Juazeiro, BA utilizando-se reguladores vegetais,poliaminas e citocininas (CK), e fungicida (piraclostrobina). Para tanto, o experimento foi dividido em três etapas: o primeiro, instaladoem viveiro telado na FCAUNESP, Botucatu ? SP de agosto a outubro de 2013 com o cv. Niagara Rosada. O delineamento experimental foi inteiramente casualizado, com oito tratamentos e cinco repetições. O segundo experimento foiconduzido em ambiente protegido (casa de vegetação) na Embrapa Semiárido ? Petrolina, PE de setembro a novembro de 2014 em esquema...
Tipo: Teses Palavras-chave: Poliaminas; 6-benzilaminopurina; Estrobirulinas; Efeito fisiológico; Crescimento vegetativo; Interação genótipo x ambiente; Crescimento; Polyamines; Benzyladenine; Vegetative growth; Physiological response; Genotype-environment interaction.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065420
Imagem não selecionada

Imprime registro no formato completo
Epibrassinolide regulated synthesis of polyamines and auxins in Raphanus sativus L. seedlings under Cu metal stress Braz. J. Plant Physiol.
Choudhary,Sikander P.; Bhardwaj,Renu; Gupta,Bishan D.; Dutt,Prabhu; Kanwar,Mukesh; Arora,Priya.
The effects of various conc of (10-11, 10-9 and 10-7 M) 24-epibrassinolide (24-epiBL) on polyamines and auxins contents was analyzed in 7days old seedlings of Raphanus sativus L. cv. Pusa chetki under copper metal stress. Cu metal (0.2mM) treatment significantly increased endogenous levels of putrescine, spermidine and spermine when compared with control values. Cadaverine content got decreased under metal stress. Endogenous polyamines showed varying levels in seedlings when applying 24-epiBL treatment only. Maximum increase was found in putrescine, cadaverine and spermidine in 10-11, 10-9 and 10-7 M conc of 24-epiBL respectively when applied alone to R. sativus seedlings. However, metal treatment supplemented with 24-epiBL revealed small increase in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Raphanus sativus; Polyamines; Auxins; Brassinosteriods; Oxidative stress; Heavy metal stress.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000100004
Imagem não selecionada

Imprime registro no formato completo
Exogenous Application of Polyamines Improves Germination and Early Seedling Growth of Hot Pepper Chilean J. Agric. Res.
Aziz Khan,Hammad; Ziaf,Khurram; Amjad,Muhammad; Iqbal,Qumer.
Polyamines are low molecular weight organic compounds involved in diverse range of biological processes in all living organisms. Seed priming is a technique that improves seed performance by rapid and uniform germination with normal and vigorous seedlings. A laboratory study was performed to explore the benefits of seed priming with polyamines on seed germination and seedling growth of hot pepper (Capsicum annuum L.) Hot pepper seeds were primed in aerated solution of putrescine, spermine, or spermidine (25, 50, 75, and 100 mM) for 48 h at 25 ± 2 °C. Significant results (P < 0.05) were observed for different attributes of seed germination and early seedling growth. Polyamines priming resulted in earlier and synchronized germination via improving final...
Tipo: Journal article Palavras-chave: Seed priming; Capsicum annuum; Polyamines.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300018
Imagem não selecionada

Imprime registro no formato completo
Fish oil ingestion reduces the number of aberrant crypt foci and adenoma in 1,2-dimethylhydrazine-induced colon cancer in rats BJMBR
Moreira,A.P.B.; Sabarense,C.M.; Dias,C.M.G.C.; Lunz,W.; Natali,A.J.; Glória,M.B.A.; Peluzio,M.C.G..
We determined the effect of fish oil (FO) ingestion on colonic carcinogenesis in rats. Male Wistar rats received 4 subcutaneous injections (40 mg/kg body weight each) of 1,2-dimethylhydrazine (DMH) at 3-day intervals and were fed a diet containing 18% by weight FO (N = 10) or soybean oil (SO, N = 10) for 36 weeks. At sacrifice, the colon was removed, aberrant crypt foci were counted and the fatty acid profile was determined. Intestinal tumors were removed and classified as adenoma or carcinoma. Liver and feces were collected and analyzed for fatty acid profile. FO reduced the mean (± SEM) number of aberrant crypt foci compared to SO (113.55 ± 6.97 vs 214.60 ± 18.61; P < 0.05) and the incidence of adenoma (FO: 20% vs SO: 100%), but carcinoma occurred...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Colonic aberrant crypt foci; Colorectal cancer prevention; Colorectal tumor; Omega-3 fatty acids; Polyamines.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001200008
Imagem não selecionada

Imprime registro no formato completo
Germinated sorghum (Sorghum bicolor L.) and seedlings show expressive contents of putrescine. Repositório Alice
PAIVA, C. L.; NETTO, D. A. M.; QUEIROZ, V. A. V.; GLORIA, M. B. A..
Free bioactive amines were quantified during germination of tannin and tannin-free sorghum seeds (8 genotypes) and seedlings (2 genotypes). Among the ten amines investigated, three (putrescine, spermidine and spermine) were found. Tannin-free sorghum seeds had higher levels of spermidine, spermine, putrescine and total amines (1.28, 1.27, 0.35, 2.91 mg/100 g dwb, respectively), compared to tannin sorghum (0.91, 1.13, 0.06, 2.09 mg/100 g dwb, respectively). Throughout germination, in all seedling parts, putrescine was prevalent followed by spermidine. Spermine was only detected in the 7th germination day in the cotyledon and radicle of tannin sorghum. In the cotyledon, putrescine levels increased (24- and 30- fold for tannin and tannin-free sorghum,...
Tipo: Artigo de periódico Palavras-chave: Espermina; Espermidina; Poliamina; Sorgo; Germinação; Polyamines; Germination; Spermine; Spermidine.
Ano: 2022 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1142565
Imagem não selecionada

Imprime registro no formato completo
HPLC profiles of polyamines in the leaves and anthers of a new thermosensitive genic male sterile rice line International Rice Research Institute
Vijayalakshmi, D.; Bangarusamy, U..
p.12-13
Palavras-chave: Male sterility; Cadaverine; Polyamines; Putrescine; Spermidine; Panicles; Leaves; Chemical composition; Plant composition.
Ano: 2004 URL: http://hdl.handle.net/123456789/925
Imagem não selecionada

Imprime registro no formato completo
Influence of dietary live yeast on European sea bass (Dicentrarchus labrax) larval development ArchiMer
Tovar Ramirez, Dariel; Zambonino-infante, Jose-luis; Cahu, Chantal; Gatesoupe, Joel; Vazquez Juarez, R.
Recent results have demonstrated that live yeast in diets improved gut maturation in sea bass larvae. In this study, we tested the absence and two levels of live yeast in sea bass larvae diets. Specimens were fed from time of mouth opening to 37 days after hatching a diet of 0%, 1.1%, or 5.7% wet weight of live yeast (Debaryomyces hansenii CBS 8339). Yeast incorporation improved survival 10%, and reduced malformed larvae. In groups fed 1.1% yeast, only 1% of larvae were malformed, compared to 14% in the control group. Final mean weight in groups fed 1.1% yeast was twice that of other groups. Activities and concentrations of mRNA trypsin and lipase were higher in the two groups fed yeast than in the control group, whereas activity and concentration of mRNA...
Tipo: Text Palavras-chave: Polyamines; Lipase; Trypsin; Amylase; Enzymes; Gut maturation; Fish larvae.
Ano: 2004 URL: https://archimer.ifremer.fr/doc/2004/publication-831.pdf
Imagem não selecionada

Imprime registro no formato completo
Phenolic compound production and biological activities from in vitro regenerated plants of gherkin (Cucumis anguria L.) Electron. J. Biotechnol.
Thiruvengadam,Muthu; Chung,Ill-Min.
Background The effect of polyamines (PAs) along with cytokinins (TDZ and BAP) and auxin (IBA) was induced by the multiple shoot regeneration from leaf explants of gherkin (Cucumis anguria L.). The polyphenolic content, antioxidant and antibacterial potential were studied from in vitro regenerated and in vivo plants. Results Murashige and Skoog (MS) medium supplemented with 3% sucrose containing a combination of 3.0 µM TDZ, 1.0 µM IBA and 75 µM spermidine induced maximum number of shoots (45 shoots per explant) was achieved. Regenerated shoots elongated in shoot elongation medium containing 1.5 µM GA3 and 50 µM spermine. The well-developed shoots were transferred to root induction medium containing 1.0 µM IBA and 50 µM putrescine. Rooted plants were...
Tipo: Journal article Palavras-chave: Biological activities; Cucumis anguria; Multiple shoot induction; Plant growth regulators; Polyamines; Polyphenolic content.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000400007
Imagem não selecionada

Imprime registro no formato completo
Potentiel probiotique de levures productrices des polyamines dans le développement du système digestif du bar Dicentrarchus labrax et de la cabrilla arenera Paralabrax maculatofasciatus ArchiMer
Tovar, Dariel.
The interest in probiotics for aquaculture is increasing rapidly. In the present work we evaluated the potential of some yeast to induce the larvae gut maturation in sea bass larvae Dicentrarchus labrax. The production of polyamines putrescine, spermidine and spermine was quantified in ten yeast strains using high performance liquid chromatography (HPLC). Afterwards, fluorescently labelled yeast adhesion to the intestine of sea bass larvae and the spotted sand bass (Paralabrax maculatofasciatus) was evaluated by fluorescent microscopy. Two of them, CBS 8339 strain (Debaryomyces hansenii) and X2180 strain (Saccharomyces cerevisiae) produce the polyamines of our interest. The same strains showed the best adhering capabilities to the sea bass and spotted sand...
Tipo: Text Palavras-chave: Ontogeny; Digestive enzymes; Fish larvae; Polyamines; Probiotics; Ontogénèse; Enzymes digestives; Larves de poisson; Polyamines; Probiotiques.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/these-103.pdf
Imagem não selecionada

Imprime registro no formato completo
Regulators, culture media and types of lights in vitro lavender culture Ciência Rural
Oliveira,Rayssa Camargo de; Asmar,Simone Abreu; Silva,Herick Fernando de Jesus; Morais,Tâmara Prado de; Luz,José Magno Queiroz.
ABSTRACT: Lavender is an aromatic ornamental plant that is used widely in the perfume, pharmaceutical, cosmetical and food industries. That is why it is important to study ways to promote a production of lavender raw material. For this, four experiments were carried out in order to study the germination and initial in vitro development of lavender. In the first part the efficiency of the use of hydrogen peroxide in the pre-treatment of seeds inoculated in culture media with different concentrations of gibberellic acid was evaluated. Besides that, the influence of the use of Growlux lamps and white fluorescent lamps on plantlets cultivated in MS and LS media at salts concentrations of 50 and 100% was evaluated. Finally, the effect of the gibberellic acid,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lavandula angustifolia; Tissue culture; GA3; Polyamines; Lamp.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001100405
Registros recuperados: 14
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional