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| Registros recuperados: 27 | |
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| ANDRADE, S. R. M.; SANT'ANNA, R.; MOSQUIM, P. R.; CAMBRAIA, J.. |
| Visando a elucidar alguns aspectos do metabolismo do nitrogenio por plantas de Panicum maximum, estudaram-se os efeitos da proporcao NH +4/NO-3 na variacao do pH das solucoes nutritivas de tratamento, no acumulo de materia seca e na distribuicaoo de nitrogenio na planta. Para tal, as plantas foram cultivadas em camara de crescimento na solucao nutritiva (pH 5,5) completa, contendo nitrogenio somente na forma nitrica. Aos 25 dias depois da germinacao, as plantas foram submetidas a 100 ppm de nitrogenio fornecido nas formas nitrica e amoniacal ou amonical, nas seguintes proporcoes 0/100,25/75,50/50,75/25 e 100/0, durante quatro dias. O pH das solucoes nutritivas foi medido e corrigido diariamente. Os resultados demostraram que o pH aumentou na presenca... |
| Tipo: Folhetos |
Palavras-chave: Amonio; Absorcao de nitrogenio; Nitrogen uptake; Ammonium; Nitrate; Fisiologia vegetal: Nutricao mineral; Capim Colonião; Cerrado; Fisiologia Vegetal; Nitrogênio; Nitrato; Panicum Maximum; Plant physiology. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567073 |
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| JAVAID,A.; AFZAL,L.; SHOAIB,A.. |
| ABSTRACT: A pot experiment was carried out for the biological control of charcoal rot on mung bean (Vigna radiata), caused by Macrophomina phaseolina. Pot soil was made sick with an inoculum of M. phaseolina. Dried powdered leaves of Sisymbrium irio, a weed from the Brassicaceae family, were mixed in soil at 1, 2 and 3% (w/w) with and without the application of Trichoderma harzianm, a fungal biological control agent. The highest grain yield (3.62 g pot-1) was recorded in a combined application of T. harzianum and 1% S. irio leaf amendment, which was 62% and 805% higher than negative and positive control treatments, respectively. The application of S. irio leaf amendment and T. harzianum generally enhanced leaf protein, sugar and chlorophyll contents, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Charcoal rot; Macrophomina phaseolina; Plant physiology; Sisymbrium irio; Trichoderma harzianum; Vigna radiata. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100274 |
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| Paiva,Selma R.; Lima,Lucilene A.; Figueiredo,Maria Raquel; Kaplan,Maria Auxiliadora C.. |
| Plumbago scandens L. is a Brazilian tropical/subtropical species that occurs along the coast. Chemically it is mainly represented by naphthoquinones, flavonoids, terpenoids and steroids. The aim of the present work is to study quantitative changes in the root metabolic production of Plumbago scandens during different physiologic developmental stages relative to floration. The results indicated the presence of four substances in the extracts: plumbagin, epi-isoshinanolone, palmitic acid and sitosterol, independent on developmental stage. The naphthoquinone plumbagin has always showed to be the major component of all extracts. Naphthoquinones exhibited their highest content during floration, while the content of the two others components decreased during... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GC/MS; Plant physiology; Plubaginaceae; Secondary metabolites. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400004 |
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| Mendonça,Giovana Soares de; Martins,Cibele Chalita; Martins,Dagoberto; Costa,Neumárcio Vilanova da. |
| The invasive behaviour of sourgrass (Digitaria insularis) in cultivated areas is due to its strategy of aggressive regeneration, which is based on seed germination. Knowledge of the physiological ecology of this species can contribute to the development of management and control strategies. The aim of this research was to understand the effects of provenance, temperature and light on the germination of sourgrass seeds collected in the Brazilian state of São Paulo in the cities of Americana, Botucatu and São José do Rio Preto and in the state of Paraná in the city of São Miguel do Iguaçu. The seeds were left to germinate at temperatures of 15, 25, 35 and 45 °C, both with and without light. The number of normal seedlings was recorded daily from seven to 60... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sourgrass; Plant physiology; Provenance; Light; Temperature. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400021 |
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| ANDRADE, S. R. M.; SANT'ANNA, J.; MOSQUIM, P. R.. |
| O objetivo deste trabalho foi estudar os efeitos da nutricao nitrica e amoniacal na distribuicao de nitrato e na atividade in vitro da redutase do nitrato em plantas de capim coloniao ( Panicum maximum Jacq.). as plantas receberam 7 mM de nitrogenio nas forma N- NH4 +, N-NO3- ou combinadas nas seguintes proporcoes 0/100, 25/75, 50/50, 75/25 e 100/0. A extracao enzigmatica foi feita em Tris-HCI 50mM pH 7,5, EDTA 0,5 mM e b-mercaptoetanol 10mM, e para o ensaio utilizou-se 200 mmoles de Tris-HCI pH 7,5, 20 mmoles KNO3, 0,1 mmol NADH e 0,1 mL de Triton X-100 1% no volume final de 2,0 mL. A concentracao de nitrato foi levemente superior na parte aerea quando as plantas receberam ambas as formas de nitrogenio, e na raiz seta decresceu com o aumento da proporcao... |
| Tipo: Folhetos |
Palavras-chave: Assimilacao de nitrogenio; Amonio; Nitrogen assimilation; Nitrate; Ammonium; Fisiologia vegetal: Nutricao mineral; Capim Colonião; Cerrado; Fisiologia Vegetal; Nitrato; Nitrogênio; Panicum Maximum; Plant physiology. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567071 |
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| OLIVEIRA JUNIOR, A. de; CASTRO, C. de; PEREIRA, L. R.; DOMINGOS, C. da S.. |
| Estádios fenológicos: fase reprodutiva (crescimento indeterminado e determinado); fase vegetativa. Marcha de absorção de nutrientes da soja: macronutrientes (nitrogênio, cálcio, fósforo, magnésio, potássio e enxofre) e micronutrientes (Boro, manganês, cobre, zinco). Extração e exportação de macro e micronutrientes em diferentes cultivares de soja: BRS 184, SYN 1059, DM 6563 - Intacta RR2 PRO (tm). |
| Tipo: Folders |
Palavras-chave: Soja; Absorção de nutrientes; Fisiologia nutricional; Soybeans; Plant physiology; Nutrients. |
| Ano: 2016 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1047123 |
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| MARTINS, C. R.; CARVALHO, H. W. L. de; TEODORO, A. V.; SOARES FILHO, W. dos S.; PASSOS, O. S.; COSTA, E. F. N.; BARRETO, C. F.. |
| Dentre os estados nordestinos produtores de citros, Bahia e Sergipe se destacam com aproximadamente 90% de toda área plantada. Em ambos, os pomares encontram-se implantados majoritariamente na Grande Unidade de Paisagem dos Tabuleiros Costeiros, cujas condições edafoclimáticas desta região (solos coesos e com períodos de escassez hídrica), tornam um ambiente com características especiais, necessitando de práticas e tratos culturais especifi cas ao cultivo dos citros. |
| Tipo: Folhetos |
Palavras-chave: Nordeste - Brasil; Lanranja; Fruta cítrica; Fenologia; Ecologia vegetal; Citricultura; Pomar; Oranges; Phenology; Plant ecology; Plant physiology. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/985160 |
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| Machado,Levi Pompermayer; Matsumoto,Silvia Tamie; Cuzzuol,Geraldo Rogério Faustini; Oliveira Jr,Luiz Fernando Ganassali. |
| The present study examined changes that took place in the physiology of three species of Rhodophyta by analysing the concentration of pigments and non-structural carbohydrates, comparatively evaluating algae collected from nature and after 28 days of laboratory cultivation. Another objective of the study was to determine whether the species retain their antifungal potential after the period of laboratory cultivation, correlating the changes in physiology and those from bioactivity. After carrying out laboratory cultivation, the results indicated a trend, in the three species of macroalgae, towards a reduction in pigment concentrations, mainly in the phycobiliproteins. For the non-structural carbohydrates no response pattern of the macroalgae was observed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant physiology; Macroalgae; Nonstructural carbohydrates; Pigments. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100007 |
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| Souza,José Roberto Pinto de; Guimarães,Maria Fátima de; Muller,Marcelo Marques Lopes; Santos,Carlos Henrique dos. |
| The objective of the experiment was to identify the morphological alterations in corn genotypes in response to aluminum toxicity in the soil. A complete randomized block design with five replications was used. The a factorial scheme was composed of two corn genotypes (C525M - tolerant, and HS701B - sensitive) and two neutralization levels (0% and 100% of aluminum saturation). The evaluations were performed at six leaf and 10-11 leaf growth stages, emergence of the "stigma-style", and the physiological maturity. The presence of toxic aluminum didnt significantly reduce diameter and height of stem, leaf area, dry matter of aerial parts, total dry matter and yield. Stem diameter, leaf area, dry matter of root, dry matter of aerial parts, total dry matter and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant physiology; Maize; Soil acidity; Plant growth. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400010 |
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| MARTINS,ADALVAN D.; MARTINS,JOÃO PAULO R.; BATISTA,LUCAS A.; DIAS,GABRIELEN M.G.; ALMEIDA,MIRIELLE O.; PASQUAL,MOACIR; SANTOS,HELOÍSA O. DOS. |
| Abstract The use of silicon in Billbergia zebrina cultivation in vitro is an alternative for optimizing micropropagation of this important ornamental plant species. The objective of the present study was to evaluate the growth and anatomical and physiological alterations in Billbergia zebrina (Herbert) Lindley plants as a function of different sources and concentrations of silicon during in vitro cultivation and acclimatization. The experimental design was completely randomized, with a double factorial arrangement and an additional control treatment (2 x 3 + 1). The first factor was relative to calcium silicate and sodium silicate added to the Murashige & Skoog culture medium; the second factor was related to its concentrations, 0.5, 1.0, and 2.0 mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliad; Micropropagation; Plant anatomy; Plant physiology; Silicon. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703449 |
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| Concenço,G; Aspiazú,I; Galon,L; Ferreira,E.A; Freitas,M.A.M; Fialho,C.M.T; Schwanke,A.M.L; Ferreira,F.A; Silva,A.A. |
| The objective of this work was to evaluate the characteristics related to the photosynthetic ability of hybrid and inbred rice varieties, as a way to assess which of the two presented higher potential to stand out under conditions of competition. The trial was set in a greenhouse in completely randomized block design and 2 x 6 factorial scheme with four replications. Factor A consisted of rice varieties (hybrid or inbred) and factor B by competition levels. Treatments consisted in maintaining one plant of either BRS Pelota (inbred) or Inov (hybrid) variety at the center of the plot, under competition with 0, 1, 2, 3, 4 or 5 plants of the variety BRS Pelota at the periphery of the experimental unit, according to the treatment. Fifty days after emergence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competitive ability; Plant physiology; Oryza sativa. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000400010 |
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| PEREZ MARTINEZ,Laura Victoria; MELGAREJO,Luz Marina. |
| Gulupa, Passiflora edulis Sims (Passifloraceae), is an important fruit due to its organoleptic and nutritional characteristics and its demand in the international market; however, very few studies have been conducted for studying its Ecophysiology. Until now, this crop has spread throughout the country through empirical knowledge without data that indicate the zones that are more suitable for its cultivation. For this reason, gas exchange, chlorophyll fluorescence (photosystem II operating efficiency and maximum quantum efficiency of photosystem II photochemistry) and leaf water potential were measured in three different locations of Cundinamarca department (Chia [2610 m a.s.l., 14 °C], Granada [2230 m a.s.l., 15 °C] and Tena [2090 m a.s.l., 17 °C]), whose... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll fluorescence; Crop; Horticulture; Passion fruit; Photosynthesis; Plant physiology; Water. |
| Ano: 2015 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100019 |
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| Registros recuperados: 27 | |
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