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Search Results: 1 - 10 of 822137 matches for " C?MARA G.M.S. "
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DESEMPENHO VEGETATIVO E PRODUTIVO DE CULTIVARES DE MANDIOCA (Manihot esculenta Crantz) A PARTIR DE MANIVAS COM DIFERENTES DI?METROS
CMARA, G.M.S.;GODOY, O.P.;
Scientia Agricola , 1998, DOI: 10.1590/S0103-90161998000200024
Abstract: this research deals with the viability study of using stem cuttings with three different diameters, related to three different positions in the cassava plant (manihot esculenta crantz), and evaluating the effects of such stem cuttings on the emergence, velocity, number and weight of tuberous roots per plant and yield of three cassava cultivars. the field research was conducted in piracicaba, sp, brazil, during two years, from september 23, 1980 to july 23, 1981, and september 1, 1981 to july 20, 1982. the mature and healthy stem cuttings were obtained from 12 month old plants of the mantiqueira, ja?an? and pirassununga cultivars. these cuttings (20 cm long) were divided into three diameter size classes: 2.6 ± .2 cm, 2.0 ± .2 cm and 1.4 ± .2 cm, representing stem cuttings taken from the main stem, the primary and the secondary ramification of the mother plants, respectively. the experimental design was a 3 x 3 factorial in randomized blocks with nine treatments in five blocks. the following conclusions are based on the results obtained: 1. the stem cutting vigor is more significantly shown in the stage of plant emergence. 2. refering to the initial phases of the development, stem cuttings with 2.0 ± .2 cm or 2.6 ± .2 cm of diameters are prefered. 3. a smaller number of tuberous root yield per plant is compensated by a major tuberous root weight. 4. neither stem cutting diameter nor stem cutting position influenced on root production per area. 5. the three cultivars used in the experiment showed a high root yield, and the cultivar mantiqueira was the most productive.
DESEMPENHO VEGETATIVO E PRODUTIVO DE CULTIVARES DE MANDIOCA (Manihot esculenta Crantz) A PARTIR DE MANIVAS COM DIFERENTES DI METROS
CMARA G.M.S.,GODOY O.P.
Scientia Agricola , 1998,
Abstract: Realizou-se esta pesquisa com a finalidade de se estudar a viabilidade da utiliza o de manivas com três diferentes diametros relacionados a três diferentes posi es nas plantas de origem, avaliando-se seus efeitos na emergência, desenvolvimento e produ o de três cultivares de mandioca (Manihot esculenta Crantz). A pesquisa no campo foi realizada em dois anos, durante o período compreendido entre 23/09/1980 e 23/07/1981 e entre 01/09/1981 e 20/07/1982, em Piracicaba, SP. Ramas maduras e sadias foram obtidas de plantas com cerca de 12 meses de idade, pertencentes aos cultivares Mantiqueira, Ja an e Pirassununga. Destas ramas, foram preparadas manivas com comprimento de 20 cm e diametros de 2,6 ± 0,2 cm, 2,0 ± 0,2 cm e 1,4 ± 0,2 cm, representando, respectivamente, manivas retiradas das hastes principais, ramifica es primárias e ramifica es secundárias das plantas de origem. O delineamento experimental foi um fatorial 3 x 3 em blocos casualizados com nove tratamentos e cinco repeti es. Foram determinados a velocidade e porcentagem de emergência, número de raízes tuberosas por planta, massa da raiz e o rendimento de raízes. De acordo com os resultados obtidos pode-se concluir: 1) O vigor da muda de mandioca, expresso através dos diversos diametros da maniva, manifesta-se significativamente no estádio de emergência da cultura; 2) Manivas com 2,0 ± 0,2 cm ou 2,6 ± 0,2 cm de diametros, retiradas respectivamente das ramifica es primárias e hastes principais, devem ser preferidas para maior velocidade e porcentagem de emergência; 3) Menor número de raízes tuberosas produzidas por planta é compensado pela maior massa individual da raiz; 4) Para a produ o de raízes por área, é indiferente a utiliza o de manivas com diametro de 2,6 ± 0,2 cm, 2,0 ± 0,2 cm e 1,4 ± 0,2 cm; 5) Os três cultivares utilizados no experimento s o de alto rendimento em raízes, destacando-se o cultivar Mantiqueira.
EFEITO DO ESPA?AMENTO ENTRE PLANTAS E DA ARQUITETURA VARIETAL NO COMPORTAMENTO VEGETATIVO E PRODUTIVO DA MANDIOCA
IROLIVEA, E.A.M.;CMARA, G.M.S.;NOGUEIRA, M.C.S.;CINTRA, H.S.;
Scientia Agricola , 1998, DOI: 10.1590/S0103-90161998000200016
Abstract: an experiment was carried out in order to evaluate the vegetative and productive behavior of three cultivars of cassava (manihot esculenta crantz) related to the above ground architecture, in four planting spacings. the research was carried out in piracicaba, state of s?o paulo, brazil from october 1993 to july 1994, on a rhodic kandindox soil. the treatments constituted of cultivars srt 59 (branca de santa catarina), iac 576-70 and iac 1287 (fibra), described as low and open-angle branching, high and close-angle branching and no or late branching, respectively. each treatment had three subtreatments of planting spacings: 1.0 m x 1.0 m; 1.0 m x 0.8 m, 1.0 m x 0.6 m and 1.0 m x 0.4 m, arranged in randomized blocks with subdivided plots and four replications. each subplot was constituted of 4 lines with 10 plants each. evaluations were performed on the 16 central plants of each subplot. the branching cultivars and the smallest planting spacings favored canopy closure. smaller the planting spacings closer the branching angle and smaller the diameter of the primary stems for the branching cultivars the smaller the planting spaces the higher the root yield for the no branching cultivars.
EFEITO DO ESPA AMENTO ENTRE PLANTAS E DA ARQUITETURA VARIETAL NO COMPORTAMENTO VEGETATIVO E PRODUTIVO DA MANDIOCA
IROLIVEA E.A.M.,CMARA G.M.S.,NOGUEIRA M.C.S.,CINTRA H.S.
Scientia Agricola , 1998,
Abstract: Com o objetivo de avaliar o comportamento vegetativo e produtivo de três cultivares de mandioca (Manihot esculenta Crantz) em rela o à arquitetura da parte aérea, em quatro espa amentos, realizou-se experimento de outubro de 1993 a julho de 1994, em solo Podzólico Vermelho Escuro Latossólico, do Município de Piracicaba, SP. Os cultivares SRT 59 com ramifica o baixa em angulo aberto, IAC 576-70 com ramifica o alta em angulo fechado e IAC 1287 sem ramifica o, foram conduzidos sob os espa amentos de 1,0 m x 0,4 m; 1,0 m x 0,6 m; 1,0 m x 0,8 m e 1,0 m x 1,0 m. O experimento foi delineado em blocos ao acaso com parcelas subdivididas, onde os espa amentos representam as parcelas e os cultivares subparcelas. Cada parcela foi constituída por 4 linhas de 10 plantas, utilizando-se as 16 plantas centrais para obten o de resultados relativos às seguintes propriedades: estandes inicial e final de plantas; número de hastes por planta; abertura de ramifica o; diametro da haste principal e rendimento de raízes. Concluiu-se que: 1) cultivares que se ramificam e espa amentos menores favorecem o fechamento precoce das copas; 2) menores espa amentos reduziram o angulo de ramifica o e o diametro da haste principal nos cultivares que se ramificam; 3) menores espa amentos aumentam o rendimento dos cultivares que n o se ramificam.
Desempenho vegetativo e produtivo de cultivares e linhagens de soja de ciclo precoce no município de Piracicaba-SP
CMARA, G.M.S.;PIEDADE, S.M.S.;MONTEIRO, J.H.;GUERZONI, R.A.;
Scientia Agricola , 1998, DOI: 10.1590/S0103-90161998000300008
Abstract: as part of the official network trials for soybean (glycine max l. merrill) cultivar screening in the state of s?o paulo-brazil, a field experiment was installed in piracicaba, to evaluate the growth and yield performance of short maturity genotypes. the experiment was arranged in a randomized block design with 20 treatments (cultivars and breeding lines) and 4 replications on a kandiudalfic eutrodox soil. the plots were 2.50 m wide and 5.0 m long, with 4 planting lines spaced 0.50 m. the cultivar ias-5 (the most used in the state of s?o paulo) and iac-17 (with high yields in the trials of the last years) were introduced as standards for comparision with the newly developed cultivars and lines. the following characteristics were evaluated: initial plant population, flowering date, maturation date, plant height at flowering and maturation, first pod insertion height, degree of lodging and grain yield. lower plant population reduced plant height at maturation, first pod insertion height and grain yield. the lines br 92-4428, br 92-6528, iac 93-680, iac 90-938, ids 413-f4, iac 93-598 and iac 90-1000 were the most productive, with yields above the standards. the lines ft 90-2687 and br 92-5261 presented the lowest yields.
Desempenho vegetativo e produtivo de cultivares e linhagens de soja de ciclo precoce no município de Piracicaba-SP
CMARA G.M.S.,PIEDADE S.M.S.,MONTEIRO J.H.,GUERZONI R.A.
Scientia Agricola , 1998,
Abstract: Como parte da rede oficial do Estado de S o Paulo relativa à competi o de linhagens de soja, desenvolveu-se no município de Piracicaba-SP, durante o ano agrícola 1996/97, experimento de campo visando avaliar o desempenho vegetativo e produtivo de linhagens e cultivares de soja (Glycine max L. Merrill) pertencentes ao ciclo de matura o precoce. Delineado em blocos ao acaso com 20 tratamentos (linhagens e cultivares) e 4 repeti es, o experimento foi instalado em Terra Roxa Estruturada eutrófica. As parcelas foram constituídas por 4 linhas espa adas entre si de 0,50 m com 5,0 m de comprimento. Como padr es de compara o das novas linhagens, foram utilizados os cultivares IAS-5 (atualmente o mais cultivado no Estado de S o Paulo) e IAC-17 (com elevada produtividade nos últimos ensaios no Estado de S o Paulo). Foram avaliadas as seguintes características: estande inicial; época de florescimento; época de matura o; altura de planta no florescimento e na matura o; altura de inser o da primeira vagem; grau de acamamento e rendimento em gr os. Concluiu-se que: a) baixo estande de plantas promoveu menor altura final, menor altura de inser o de vagem e menor rendimento em gr os; b) as linhagens BR 92-4428, BR 92-6528, IAC 93-680, IAC 90-938, IDS 413-F4, IAC 93-598 e IAC 90-1000, foram as mais produtivas, superando ambos os padr es; c) as linhagens FT 90-2687 e BR 92-5261, apresentaram os piores rendimentos.
Atividade potencialmente alelopática do óleo essencial de Ocimum americanum
Souza Filho, A.P.S.;Bayma, J.C.;Guilhon, G.M.S.P.;Zoghbi, M.G.B.;
Planta Daninha , 2009, DOI: 10.1590/S0100-83582009000300010
Abstract: essential oils are known for their several biological activities. the biodiversity of the amazon region is rich in essential-oil producing plants.the aim of this work was to study the potentially allelopathic activity of the essential oil of ocimum americanum and to determine its effects on seed germination and growth of two weed species. solutions of the essential oil were tested at concentrations varying from 100 to 2,000 mg l-1, considering their effects on seed germination (at 25 oc and a photoperiod of 12 hours) and radicle and hypocotyl growth (at 25 oc and a photoperiod of 24 hours) of the weeds mimosa pudica and senna obtusifolia. factors related to concentration, specificity of the receiving plants and the parameters analyzed were decisive for the effects obtained. overall, there was a positive relation between concentration and inhibitory effect. m. pudica tended to be more sensitive to the effects than s. obtusifolia. seed germination was more affected by the essential oil, followed by radicle elongation and hypocotyl elongation. the observed effects can be attributed to the composition of the essential oil, that includes monoterpenes, sesquiterpenes, aliphatic compounds and phenylpropanoids. the compounds limonene, camphor and linalol, found in the essential oil, are known to have allelopathic activity.
Immunological properties of gene vaccines delivered by different routes
Oliveira S.C.,Rosinha G.M.S.,de-Brito C.F.A.,Fonseca C.T.
Brazilian Journal of Medical and Biological Research , 1999,
Abstract: Gene vaccines represent a new and promising approach to control infectious diseases, inducing a protective immune response in the appropriate host. Several routes and methods of genetic immunization have been shown to induce antibody production as well as T helper (Th) cell and cytotoxic T lymphocyte activation. However, few studies have compared the nature of the immune responses generated by different gene vaccination delivery systems. In the present study we reviewed some aspects of immunity induced by gene immunization and compared the immune responses produced by intramuscular (im) DNA injection to gene gun-mediated DNA transfer into the skin of BALB/c mice. Using a reporter gene coding for -galactosidase, we have demonstrated that im injection raised a predominantly Th1 response with mostly IgG2a anti- gal produced, while gene gun immunization induced a mixed Th1/Th2 profile with a balanced production of IgG2a and IgG1 subclasses. Distinct types of immune responses were generated by different methods of gene delivery. These findings have important implications for genetic vaccine design. Firstly, a combination between these two systems may create optimal conditions for the induction of a broad-based immune response. Alternatively, a particular gene vaccine delivery method might be used according to the immune response required for host protection. Here, we describe the characteristics of the immune response induced by gene vaccination and the properties of DNA involved in this process.
Bioensaios de atividade alelopática dos esteroides espinasterol, espinasterona e glicopiranosil espinasterol Bioassays of allelopathic activity of the steroids spinasterol, spinasterone, and spinasterol glicopyranosyl
H.S. Ripardo Filho,L.C. Pacheco,A.P.S. Souza Filho,G.M.S.P. Guilhon
Planta Daninha , 2012, DOI: 10.1590/s0100-83582012000400003
Abstract: Três esteroides (espinasterol, espinasterona e glicopiranosil espinasterol) foram isolados do caule de Moutabea guianensis, planta de origem amaz nica. Suas estruturas foram determinadas a partir das análises de RMN e por compara o com dados espectroscópicos da literatura. Foram avaliadas as atividades alelopáticas das três substancias em duas plantas invasoras de pastagens comuns da regi o amaz nica: Mimosa pudica (malícia) e Senna obtusifolia (mata-pasto). A substancia glicopiranosil espinasterol foi mais ativa no ensaio de desenvolvimento da radícula, inibindo a espécie Senna obtusifolia em 75%; o espinasterol inibiu em 22% o desenvolvimento do hipocótilo de Senna obtusifolia; e no bioensaio de germina o de sementes as substancias espinasterol e espinasterona proporcionaram 10% de inibi o em Mimosa pudica. A partir desses resultados, observou-se que a diferen a de substituintes observada na posi o-3 dos esteroides é capaz de alterar a atividade alelopática. O grupo glicosil na posi o-3 elevou a atividade alelopática de forma mais expressiva no bioensaio de desenvolvimento de radícula da espécie malícia, quando comparado aos esteroides hidroxilado e carbonilado. Este é o primeiro estudo químico e alelopático do gênero Moutabea. Three steroids (spinasterol, spinasterone, and spinasterol glucopyranosyl) were isolated from the stem of the Amazonian plant Moutabea guianensis. Their structures were determined on the basis of NMR analysis and by comparison with spectroscopic data found in the literature. The allelopathic activities of the three substances were evaluated against two common weeds of the Amazon region, Mimosa pudica ('malicia') and Senna obtusifolia ('mata-pasto'). The substance spinasterol glucopyranosyl was the most active in the radicle growth bioassay, inhibiting Senna obtusifolia in 75%; spinasterol inhibited the development of hypocotyl of Senna obtusifolia in 22%, and spinasterone and spinasterol inhibited 10% of the seed germination of the species Mimosa pudica. These results showed that the difference of substitutes at the C-3 position of the steroids can influence allelopathic activity: the glicosyl group at the C-3 position enhanced the inhibition of hypocotyl growth of the species Mimosa pudica, compared to the hydroxilated and carbonylated steroid. This is the first chemical and allelopathic study with Moutabea guianensis.
Relationship between nitrogen sources, germination and vigor of soybean seeds
Marcos-Filho, J.;Custodio, C.C.;Camara, G.M.S.;Marcos, E.A.;Miranda, R.E.;
Scientia Agricola , 1994, DOI: 10.1590/S0103-90161994000200017
Abstract: this research was conducted in two experimental areas; the first had been under cultivation with bradyrhizobium japonicum anually inoculated for several years and the second was cultivated with sugarcane for many years receiving only mineral fertilization. mineral nitrogen (urea and ammonium) effect was compared with the effects of inoculant treatments (liquid and peat carriers) on plant development, yield and seed quality. after harvesting, seeds were stored under normal environmental conditions and tested periodically. germination, accelerated aging, electrical conductivity and seedling emergence tests showed that seeds coming from the area where inoculation was practiced have better quality. best plant performance regarding plant height at different growth stages and yield was also found in this area. among the nitrogen sources studied, best results were obtained when peat was the inoculant carrier.
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