Bragantia

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List of Papers (Total 294)

Caracterização de formas botânicas diversas do Banco Ativo de Germoplasma de cafeeiros do Estado de Minas Gerais, Brasil

The objective of this study was to characterize 21 accessions of various botanical forms of existing coffee in the Active Germplasm Bank of the State of Minas Gerais, in order to identify genotypes with potential for use in breeding programs. In the field trial, each access is represented by 20 plants, in randomized complete block design with two replications. Coffee plants were...

Penetration resistance according to penetration rate, cone base size and different soil conditions

This study aimed to evaluate the effect of penetration rate and the size of the cone base on the resistance to penetration under different soil moistures and soil bulk density. The experimental design was completely randomized in a 4x2x2x2 factorial arrangement, with the factors, soil bulk density of 1.0; 1.2; 1.4 and 1.6 Mg m-3, soil moisture at the evaluation of 0.16 and 0.22...

Comparison between diploid and tetraploid citrus rootstocks: morphological characterization and growth evaluation

Tetraploid citrus rootstocks may present different morphological characteristics and growth when compared to diploid ones. This worked aimed at comparing morphological characteristics and height growth of diploid and tetraploid plants from the rootstocks 'Swingle' citrumelo [C. paradise Macf. x Poncirus trifoliate (L.) Raf], citrange 'Troyer' (C. sinensis (L.) Osb. x P...

Múltiplos apressórios e tubos de anastomoses conidiais no processo infeccioso de Colletotrichum gloeosporioides em macieira

The Glomerella Leaf Spot (GLS), caused by Colletotrichum gloeosporioides is an emerging and destructive plant disease, of which little is known about the relationship pathogen/host. The objective of this study was to quantify the number of appressoria per conidium and verify the presence of Conidial Anastomosis Tubes (CAT) formed on apple resistant and susceptible leaves to GLS...

Silício alterando compostos derivados da pirólise de bainhas foliares de plantas de arroz infectadas por Rhizoctonia solani

This study elucidated, through analytical pyrolysis coupled to gas chromatography and mass spectrometry, changes in the chemical composition of lignin on leaf sheaths of rice plants of cultivars BR-Irga 409 and Labelle supplied or non-supplied with silicon (Si) and infected with Rhizoctonia solani. The Si concentration on leaf sheaths of plants supplied with this element was...

Seleção para tolerância ao alumínio em milho com base em parâmetros genéticos e análise multivariada

The improvement of plants, in the last 40 years, has pledged efforts in the search of maize genotypes with aluminum tolerance. The understanding of the existing variability and the genetic distance between genotypes serves as basis for crossings in breeding programs. The objective of this work was to study aluminum tolerance in maize based on multivariate analysis and genetic...

Variabilidade espacial e disponibilidade de cobre e zinco em solos de vinhedos e adjacências

With time, the intensive agricultural use of soil may lead to its contamination with heavy metals, mainly under the intense use of agrochemicals that are composed by zinc and copper. The objective of this work was to assess the concentration of available copper and zinc, extracted by DTPA, and evaluate its spatial distribution using geostatistics in experimental and commercial...

Produtividade de alho vernalizado em função de doses de nitrogênio e molibdênio

The introduction of noble garlic cultivars from South of the Brazil and Argentina in new regions, mostly due to the vernalization technique, contributed significantly for elevation in the productivity and quality of the garlic produced in Brazil. However, few are the studies aiming determine the nutritional requirements of vernalized garlic. The nitrogen present high influence in...

Estimativa de área de folíolos de soja usando imagens digitais e dimensões foliares

Measurements of leaf area index are required in most of agronomic and physiological studies involving plant growth. Two direct methods for estimation of soybean leaf area (leaf dimensions and digital images captured by ordinary digital cameras) were evaluated, in two distinct conditions (entire leaf and damaged leaf). The estimations were compared with measurements taken by a LI...

Biologia reprodutiva de Cryptostegia madagascariensis Bojer ex Decne. (Periplocoideae, Apocynaceae), espécie ornamental e exótica no Brasil

Reproductive phenology, floral biology, breeding system and pollinators were analyzed on Cryptostegia madagascariensis individuals cultivated at Federal University of Viçosa campus, municipality of Viçosa, Zona da Mata of Minas Gerais State. In addition, seed viability and vigour from naturally opened fruits were tested. Seed germination from yellow-green pericarp closed fruits...

Características da pulverização produzida por pontas Yamaho da série 'D'¹

This study evaluated the characteristics of spray produced by Yamaho nozzle tip 'D' series. The droplet size of nozzle tips D3, D4, D5, D6 and D8 were evaluated at 703, 1.050, 1.406, 1.758, 2.110, 2.461 e 2.813 kPa pressures (100, 200, 250; 350, e 400 psi) by means of laser equipment, as well as the flow rate of nozzle tip at the pressures of 702, 1.125, 1.406, 1.828, 2.110, 2...

Desempenho de cinco clones jovens de seringueira na região do Planalto Ocidental Paulista

The region of São Paulo Occidental Plateau is well known for its part as a major producer of natural rubber. In order to obtain information about adaptation of rubber tree clones [Hevea brasiliensis (Wildd. ex. Adr. de Juss) Müell. Arg.] RRIM 600, RRIM 701, IAN 873, PB 235 and GT 1, in the city of São José do Rio Preto some biologic characteristics were evaluated. Analysis were...

Avaliação da produção de grãos e características agronômicas em genótipos de trigo, em 1999 e 2000

Eighteen wheat lines and two cultivars were evaluated in trial carried out under sprinkler irrigation, limed and fertilized soils, at the Tatuí Agronomy Experimental Station, State of São Paulo, Brazil during 1999 and 2000. Grain yield, plant height, number of days from emergence to flowering, number of grains per spike, 100 grain weight, grain length, width and thickness were...