Bragantia

http://www.scielo.br/scielo.php?script=sci_issues&pid=0006-8705&lng=pt&nrm=iso

List of Papers (Total 294)

CARACTERIZAÇÃO MORFOLÓGICA DE ACESSOS DE GERMOPLASMA DE QUATRO ESPÉCIES BRASILEIRAS DE AMENDOIM-SILVESTRE

In this work, a morphological characterization of germplasm accessions of wild Brazilian species of peanut, section Arachis was accomplished. Also, an analysis of the genetic similarity among accessions and between species was evaluated. The experiment was undertaken from 1993 to 1996, at the Campinas Experimental Station of the Instituto Agronômico (IAC). Accessions evaluated...

INFLUÊNCIA DA LUZ NA GERMINAÇÃO DE SEMENTES DE CANAFÍSTULA SUBMETIDAS AO ESTRESSE HÍDRICO

This research aimed at recording the influence of light during germination of canafistula seeds under water stress. Seeds of Peltophorum dubium (Spreng.) Taub. were selected for this experiment. Four samples of 50 seeds were used in each test. The seeds were previously scarified with sulfuric acid during 20 minutes, rinsed and distributed in sterilized Petri dishes and incubated...

Adaptabilidade e estabilidade de produção de cultivares e linhagens de feijoeiro no Estado de São Paulo

Twelve common beans cultivars and lines were evaluated in São Paulo State, Brazil according to 24 environments (growing season, years and locations). The yield stability and adaptability were determined by two methods of analysis and their efficiency evaluated. IAC-Carioca and IAC-Una cultivars were used as standards for grain types carioca and black, respectively. For each...

Efeitos do nível de inóculo de Meloidogyne incognita em algodoeiro

Investigations on physiological responses of plants to nematode are usually carried out with plants inoculated with high number of eggs or second-stage juveniles. On the other hand, resistance against nematodes in plant breeding programs is evaluated with low number of inoculum. The aim of this research was to study some physiological responses of cotton plants inoculated with...

Contaminação fúngica do amendoim em função das doses de calcário e épocas de amostragem

Diversity of fungus populations in soil could vary according to abiotic and biotic factors. On peanut cultivated soils, these can contaminate seeds, affecting their quality. This experiment was carried out to evaluate the effects of liming and sampling time, both of soil and peanut pods, fungus populations in the soil, specially in respect to possible contamination with...

Influência da época de semeadura e do manejo da parte aérea de milheto sobre a soja em sucessão em plantio direto

Crop residues management must be adequate in no-tillage systems. Winter millet has shown to produce crop residues of slow decomposition in adequate amounts. The experiment aimed to study growing millet in three sowing times (5/Mar, 25/Mar and 19 Apr/99, under rainfed conditions, five types of crop cut management (at each flowering and no residues; at each flowering with residues...

Segregações gaméticas de locos isoenzímicos em porta-enxertos de citros e suas contribuições alélicas na formação de híbridos

The rootstock clones Rangpur lime(Citrus limonia), Sunki mandarin (C. sunki), Sour orange (C. aurantium) and Trifoliate orange(Poncirus trifoliata) were studied by discontinuous horizontal starch gel electrophoresis as to genotypes and segregations of the isozyme loci Pgi-1, Pgm-1, Got-1, Got-2, Prxa-1, Aps-1 and Me-1 as well as their relative allelic contributions to more than...

Viabilidade de sementes de trigo tratadas com fenitrotion e infestadas por Sitophilus oryzae (L.) (Coleoptera: Curculionidae) durante o armazenamento

Clarifying aspects of the weevils (Sitophilus spp.) behavior on stored wheat seeds, considering the seed quality, is essential to improve the seed management during storage. In order to evaluate the efficiency of the insecticide fenitrothion as protecting wheat seeds against Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and to measure the seed germination during storage...

Efeito da tristeza em caracteres vegetativos, produtivos e industriais da laranjeira 'Valência

The effect of the citrus tristeza disease caused by CTV on vegetative, productive, and industrial characters of the sweet orange 'Valencia' grafted onto seven hybrid progenies of full sibs segregating for tolerance was studied. The hybrids were originated from controlled crosses between the commercial rootstocks 'Davis A' Poncirus trifoliata (T), Sunki mandarin (S), 'São Paulo...

Uso da sensitividade à radiação gama na discriminação de variedades de arroz-de-sequeiro dos grupos Índica e Japônica

Sixty-five upland rice cultivars (Oryza sativa L.) were evaluated in relation to gamma-ray sensitivity. Seeds were subjected to seven doses of gamma-radiation and sown in wooden boxes in randomised complete block design with three replications. The experiment was conducted in greenhouse during the year of 1992. Physiological effects caused by radiation in the M1 generation, were...

Fator de resposta da produção do cafeeiro ao deficit hídrico em Campinas

Coffee yield response to available water is a major factor on yield prediction and irrigation feasibility. In this way, results of irrigated (Yi) and non irrigated (Yni) yields of a 16-year field experiment with coffee plants carried out in Campinas, State of São Paulo, Brazil, were analyzed as relative differences of (Yi-Yni)/Yi and correlated to the relative difference of...

Efeitos imediatos e latentes de tratamentos térmico e químico em sementes de Brachiaria brizantha cultivar Marandu

The objective of this research was to study the effects of thermal and chemical treatments on Brachiaria brizantha cv. Marandu seeds, particularly in relation to dormancy. Seeds presenting dormancy indices higher than 25% and physical purity above 98% were submitted to temperatures of 65, 70, 75 and 80 °C for periods of 5, 10 and 15 hours and to immersion in sulphuric acid (98...

Doses de fósforo e crescimento radicular de cultivares de arroz de terras altas

Very little is known of phosphorus availability for upland rice. The objective of this work was to evaluate root growth of upland rice cultivars in different conditions of phosphorus availability. The experiment was carried out in greenhouse, in a completely randomized design, as a 4 x 4 factorial, with four doses of P (0, 50, 100 and 200 mg dm-3) and four cultivars: Maravilha...

Teores de Ca e variáveis meteorológicas: relações com a incidência da mancha fisiológica do mamão no Norte Fluminense

In Brazil and other parts of the world, papaya fruit suffer with a physiological disruption, known as skin freckles (SF). There is very little information available concerning the causes of this disruption that seriously affects the commercialization of the papaya fruit. In an attempt to discover the possible cause of SF, experiments were carried out during 12 months in a...

Produtividade do cafeeiro e cultivos intercalares sob diferentes regimes hídricos

The effect of soil water regimes on coffee yield and intercropping species were assessed by an experiment conducted in a red dark Latosol, in Londrina, State of Paraná, Brazil. Treatments consisting on application of irrigation for maintaining soil moisture in the 0-0.7m depth above 50% soil available water (40 kPa at 0.25 m) and 70% soil available water (70 kPa at 0.25 m), in...

Avaliação e seleção de progênies F3 de cafeeiros de porte baixo com o gene SH3 de resistência a Hemileia vastatrix Berk. et Br.

The present work evaluated 36 arabic coffee (Coffea arabica L.) F3 progenies, originated from crosses among cultivars Catuaí Vermelho IAC 46 and Catuaí Vermelho IAC 81 and access IAC 1110 (BA-10). This last cultivar came from India and exhibits SH2 and SH3 rust resistance genes. The experiment was installed in 1988 at the Experimental Center of the Agronomic Institute (IAC/APTA...

Efeito da concentração salina e pH de soluções nutritivas no crescimento radicular de plântulas de trigo

Fourteen wheat genotypes (mutant lines and cultivars) were evaluated in relation to the primary root growth, during 7 and 15 days of development, in aerated nutrient solutions, under laboratory conditions, in two experiments, carried out in randomized block design with two replications. In the first experiment, pH (4.0) and temperature (24 ± 1ºC) were kept constant. Four...

Efeito de extratos aquosos de plantas na oviposição da traça-das-crucíferas, em couve

The effect of aqueous extracts from Achillea millefolium L. (leaves), Azadirachta indica A. Juss. (leaves), Bidens pilosa L. (leaves, fruits e branches), Bougainvillea glabra Choisy (leaves), Chenopodium ambrosioides L. (leaves, fruits e branches), Datura suaveolens Humb & Bonpl. ex. Willd (leaves), Enterolobium contortisilliquum (Vell.) Morong (fruits), Mentha crispa L. (leaves...

Efeito do paclobutrazol em duas épocas de produção da mangueira

The growth regulators have been used as a practice to alter the mango phenologic cycle in order to forecast the harvest. With the aim to define doses and Paclobutrazol (PBZ) application forms, an experiment was carried out in Itaberaba, State of Bahia, Brazil. Two ways of application were tested, via soil and foliar, and two different paclobutrazol doses. It was found that PBZ...

Qualidade do grão e da bebida em cafeeiros tratados com lodo de esgoto

The objective of this study was to evaluate the effect of the application of sewage sludge (LE) in a commercial coffee crop on the quality of the beverage as evaluated by the activity the enzyme of polyphenoloxidase (PPO) and sensory analysis. The work was carried out under commercial field conditions at the Santa Eliza Farm, Patrocínio Paulista, State of São Paulo, Brazil, in...

Método da adsorção de césio para determinação da carga estrutural em solos altamente intemperizados

The knowledge of permanent and variable charge is of high importance to a better understanding of the fate of chemical elements in soil. Four Brazilian Oxisols presenting acric character were investigated by an ion adsorption method that measures the structural charge density (sO) and were compared to an Alfisol (NV), which had predominantly permanent charge. The method is based...

Disponibilidade de níquel em solo tratado com lodo de esgoto e cultivado com sorgo

The presence of the heavy metal nickel in plants growing in soils treated with sewage sludge can be a restraining factor for using this waste in agriculture. The aim of this paper was to evaluate nickel availability and absorption by sorghum plants in soil treated with sewage sludge contaminated with increasing doses of nickel. The experiment was carried out in a greenhouse, in...

Associação de fungos micorrízicos arbusculares e cultivares micropropagadas de antúrio

One of the most important steps on micropropagated Anthurium plantlets is the acclimatization. Mycorrhization could be a process that helps the plantlets to change to the autotrophic state. The objective was to evaluate the effect of the mycorrhizal association on the growth of Anthurium cultivars. A experiment was conducted under greenhouse conditions, using the cultivars IAC...

Efeito de extratos aquosos de Azadirachta indica, Melia azedarach e Aspidosperma pyrifolium no desenvolvimento e oviposição de Plutella xylostella

The effects of aqueous extracts of plants on the biology, preference for oviposition and embryonic period of Plutella xylostella were evaluated. Concentrations between 0.03 and 0.8 % for kernel of Azadirachta indica, 0.5 and 7.0% for peel of Aspidosperma pyrifolium and 0.5 and 12.5% for fruits of Melia azedarach were used, with LC50 values of 0.06; 2.17 and 2.90%, respectively...

Influência do tipo e da quantidade de resíduos vegetais associados a herbicidas residuais no desenvolvimento da cultura da soja

This work was conducted in the agricultural years 2003/2004 and 2004/2005, at the "Três Marcos" Farm, Uberlândia (MG), Brazil. It was aimed to evaluate the effect of crop residues [coverage sorghum (hybrid Cober Exp), forage millet (var. BN2), finger millet (Eleusine coracana) and St. Lucia Grass (Brachiaria brizantha)] in two amounts: 3.0 and 5.5 t ha-1 in the first year and 3.5...