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Silva D.B.,Embrapa Recursos Geneticos e Biotecnologia | Vieira R.F.,Embrapa Recursos Geneticos e Biotecnologia | Cordeiro M.C.T.,Embrapa Recursos Geneticos e Biotecnologia | Pereira E.B.C.,Setor Leste Universitario | Pereira A.V.,Embrapa Transferencia de Tecnologia
Revista Brasileira de Plantas Medicinais | Year: 2011

Brosimum gaudichaudii Tréc. (mama-cadela) is a medicinal plant native to Cerrado and largely used in traditional medicine. The aim of this study was to verify the propagation of mama-cadela by means of root cutting under the effect of plant growth regulators and different substrates. In experiment 1, the effects of indole butyric acid (IBA) and naphthylacetic acid (NAA) at the concentration of 1000 mg L-1 were evaluated together with three substrates (S1 - sand; S2 -75% sand + 25% commercial substrate; S3 - 50% sand + 50% commercial substrate). In experiment 2, 4 IBA levels were evaluated: 0 - control; 250 mg L-1 (1.3426 mM); 500 mg L-1 (2.6853 mM) and 1000 mg L-1 (5.3706 mM), as well as 4 NAA levels: 0 - control; 250 mg L-1 (1.2295 mM); 500 mg L-1 (2.458 mM) and 1000 mg L-1 (4.918 mM). The adopted experimental design was in randomized blocks with three replicates of six cuttings per plot. In experiment 1, substrates containing sand and sand (75%) + commercial substrate (25%) promoted the highest average rooting indexes. Application of IBA (1000 mg L-1) led to increases of 30.8% and 51.3% in the average rooting indexes compared to control and NAA application, respectively. In experiment 2, there was a significant quadratic response of IBA application on the average rooting index. The level of 500 mg L-1 (2.6853 mM) promoted the highest average rooting index. There was no significant effect of NAA levels for the evaluated parameters. Similarly, there was no significant effect of substrates or hormones on the remaining parameters evaluated. These results show the potential use of mama-cadela root cuttings for the production of clonal seedlings of this species.

Tavares L.C.V.,Caixa Postal 231 | Bassoi M.C.,Caixa Postal 231 | Miranda L.C.,Embrapa Transferencia de Tecnologia | Prete C.E.C.,State University Londrina
Revista Brasileira de Sementes | Year: 2011

The objective of this study was to describe and analyze the technology transfer process of wheat cultivars developed by Embrapa Soybean and Embrapa Technology Transfer, in partnership with private seed producers of the Meridional Foundation. Systemic methodology, characterized by the stages of planning, establishment and management of demonstration units, establishment and monitoring of field days and evaluation and reporting of the results, was used. The work of the wheat breeding program of Embrapa Soybean with seed producers resulted in an increase in the participation of Embrapa cultivars in Paraná state's seed production. These results demonstrated the importance of associating technology transfer with wheat improvement in order to promote and speed up scientific and technological information to technical assistance, farmers and other Embrapa customers.

Costa C.J.,Embrapa Clima Temperado | de Araujo R.B.,Nufarm Industria Quimica e Farmaceutica | Boas H.D.C.V.,Embrapa Transferencia de Tecnologia
Pesquisa Agropecuaria Tropical | Year: 2011

Most of the tropical forages is affected by seed dormancy, which can hinder the determination of its physiological quality, field seedling emergence, and the establishment of pastures. This study aimed to evaluate the effectiveness of acid scarification and application of germination promoters on the dormancy release of stored seeds of Brachiaria humidicola. Seeds stored during nine and 21 months were scarified with the aid of concentrated sulfuric acid. Afterwards, the seeds were placed to germinate on a blotter paper moistened with the following solutions: KNO3 (0.2%), gibberellic acid (100 mg L-1), H2O2 (0.30%), and distilled water. The seeds remained for 21 days under an alternating temperatures regime (15-35°C) and light cycles (8 hours of light/16 hours of darkness), when the percentages of germination and dormant seeds were evaluated. Acid scarification was more effective on dormancy release in the seeds stored up to nine months, in comparison to the ones stored for 21 months, with reduction of dormant seeds percentage from 84% to 36%. Acid scarification of seeds stored up to nine months, followed by the gibberellic acid treatment, or the storage of seeds up to 21 months resulted in a 60% germination rate. The storage of B. humidicola seeds up to 21 months is more effective for dormancy release than the acid scarification or the application of germination promoters.

Marangon M.A.,Embrapa Transferencia de Tecnologia | Biasi L.A.,Federal University of Parana
Pesquisa Agropecuaria Brasileira | Year: 2013

The objective of this work was to evaluate the effects of the application of concentrations of indolebutyric acid (IBA) and of bottom heat on rooting of stem cuttings of the blueberry cultivars Bluebelle, Bluegem, and Powderblue in the four seasons of the year. A completely randomized design was used, with a 4x5x2 factorial arrangement (seasons x concentrations of IBA x with and without heat), with 4 replicates and 20 stem cuttings as an experimental unit. The percentage of rooted cuttings, dead, alive and with callus, and the number and average length of the roots were evaluated. The highest rooting percentages were 57.1% for 'Bluegem' in summer, 30% for 'Bluebelle' in spring, with heating, and 63% for 'Powderblue' in summer with heating. IBA at the concentration of 2,000 mg L-1 increased the rooting of cuttings of the cultivars Bluegem and 'Powderblue'. Bottom heat increases the rooting of the cuttings harvested during autumn and winter in all cultivars, and also the cuttings harvested during summer and spring in the Bluebelle cultivar.

Mendonca K.H.,Federal University of Goais | Duarte D.A.D.S.,Federal University of Goais | de Melo Costa V.A.,Federal University of Goais | Matos G.R.,Embrapa Transferencia de Tecnologia | Seleguini A.,Federal University of Goais
Revista Ciencia Agronomica | Year: 2013

In Brazil, 60% of the area planted with banana are of the Prata, Prata Anã and Pacovan cultivars, However, despite the importance and representativeness of these genotypes they are all susceptible to the major pests and diseases of this crop. The objective here was to evaluate the growth, development and yield of 23 banana genotypes: Caipira, Calipso, Bucaneiro, FHIA-02, FHIA-17, Thap Maeo, FHIA-01, FHIA-18, PA42-44, PA94-01, ST42 -08, PV42- 53, PV42-142-34 and PV79, PV94-01, PV42-81, YB42-21-03 YB42, YB42-07 Pacovan, Prat, Prata Anã, Maçã and Grand Naine in the city of Goiânia, in the state of Goiás, with a view to matching genotypes to commercial production systems in the region. The experiment was carried out at Embrapa Technology Transfer at the Goiânia Business Office. An experimental design of randomized blocks with three replications was adopted. The following characteristics were evaluated: plant height, pseudostem circumference, number of living leaves at flowering and at harvest, flowering and harvest cycle of the first bunch, number of hands per bunch, fruit weight, bunch and hand weight, fruit number, length and diameter. Data underwent variance analysis and the means were compared by the Scott-Knott test at 5%. The results of this work qualify the cultivars FHIA 17, Tropical, FHIA 01, Grand Naine and Buccaneer as promising for incorporation into the production systems of the region.

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