Use of repellents for honeybees (Apis mellifera L.) in vitro in the yellow passion-fruit (Passiflora edulis Deg) crop and in confined beef cattle feeders

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

The influence of ripening stage and cultivation system on the total antioxidant activity and total phenolic compounds of yellow passion fruit pulp

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Analysis of the efficiency of silicate clay on the control of Xanthomonas axonopodis PV. passiflorae in vitro and in seedlings of yellow passion fruit contaminated

The bacterial spot in yellow passion fruit plants, caused by the bacteria Xanthomonas axonopodis pv. passiflorae, occurs in all producing areas of the country, and is responsible for great economic losses in the culture of passion fruit. This study aimed to test the efficiency of the silicate clay in the inhibition of the bacteria Xanthomonas axonopodis pv. passiflorae in vitro, and in both preventive and curative control of the bacterial spot in seedlings of yellow passion fruit plants. The silicate clay was added to the growth medium at concentrations of. 0.5, 1.0, 1.5 and 2.0%, placed in Petri dishes. After the culture medium was cooler, the bacterial suspension was inoculates (10(7) UFC.mL(-1)) with a handle, and left incubating at 28 degrees C for three days, and then the bacterial growth was evaluated. Subsequently, the product at the same concentrations above was sprayed on seedlings of 'Afruvec' passion fruit, as preventive or curative. The inoculation of the bacteria was made by foliar spraying of bacterial suspension (10(7) ufc.mL(-1)), 24 hours before or after the curative and preventive treatments, respectively. The severity of the disease was measured comparing each four true leaves from bottom up, with a diagrammatic scale. In the concentrations evaluated, the silicate clay inhibited both bacteria in vitro and symptoms of bacterial spot in the curative treatment. In preventive treatment, significant results were obtained using more than 1.0% of clay silicates. Based on these results, the clay silicate can be recommended, the concentration of 1.0-2.0% for the control of bacterial spot of passion fruit plants, in foliar sprays.

Histochemical analysis of seed reserve mobilization in Passiflora edulis Sims fo. flavicarpa O. Deg. (yellow passion fruit) during germination

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Yellow passion fruit seed oil (Passiflora edulis f. flavicarpa): physical and chemical characteristics

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fusarium solani f. sp. passiflorae: A new forma specialis causing collar rot in yellow passion fruit

The aim of this study was to characterize a Fusarium population obtained from yellow passion fruit (YPF) with collar rot using pathogenicity, morphocultural characteristics and molecular tests. Pathogenicity and disease severity were assessed in six plant species: YPF, zucchini, tomato, bean, soya bean and cucumber. Potato dextrose agar medium (PDA) was used to determine mycelial growth at five temperatures (15-35°C). The colour produced by isolates was also determined on PDA at 25°C. Synthetic nutrient agar medium was used to evaluate: (i) type of mycelium and phialides; (ii) size, shape and number of septa from conidia; and (iii) production of chlamydospores and perithecia. Molecular tests consisted of sequencing the ITS-5·8S rDNA region and elongation factor 1α (EF-1α) gene. The isolates caused large lesions on YPF, zucchini and tomato, with YPF having the highest mean disease severity and being the only one that showed wilt symptoms and death of the plant. Thus the isolates showed host specificity. Maximum mycelial growth occurred at 25°C and the predominant colour was bluish-white. The isolates produced long phialides, dense aerial mycelium, oval microconidia with a mean size of 9·5 × 2·6 μm, macroconidia of 32·7 × 3·4 μm with 3·3 septa, and chlamydospores; only one isolate lacked perithecia. Phylogenetic trees of the ITS region and EF-1α gene showed that isolates from YPF formed a distinct group within the F. solani group and the formae speciales of F. solani. It is proposed to name all isolates from YPF as F. solani f. sp. passiflorae. © 2013 British Society for Plant Pathology.

Evaluation of the Antihypertensive Properties of Yellow Passion Fruit Pulp (Passiflora edulis Sims f. flavicarpa Deg.) in Spontaneously Hypertensive Rats

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Sensitivity of yellow passion fruit plants to ultraviolet-B radiation

The objective of this work was to evaluate the effects of UV-B radiation on the vegetative growth and on the gas exchange characteristics of passion fruit plants (Passiflora edulis) grown in greenhouse. The average unweighted UV-B radiation near the apex of the plants was 8 W m-2 for the UV-B treatment (high UV-B), and 0.8 W m-2 for the control plants (low UV-B). Plants were irradiated with UV-B for 7 hours per day, centered on solar noon, during 16 days. High UV-B radiation resulted in lower shoot dry matter accumulation per plant. The content of UV-B absorbing compounds and anthocyanins was increased in the plants exposed to high UV-B radiation, when compared with the control. UV-B radiation did not affect stomatal conductance or transpiration rate, but reduced photosynthesis and instantaneous water‑use efficiency, and increased intercellular CO2 concentration. The accumulation of UV-B-absorbing compounds and anthocyanins did not effectively shield plants from supplementary UV-B radiation, since the growth and photosynthetic processes were significantly reduced.

Análise econômica da produção do Maracujazeiro amarelo em sistemas orgânico e convencional

This work was carried out in the city of Maringa, located in the Northwest region of Parana, with the aim of analyzing economically the yellow passion fruit crop (Passiflora edulis Sims. f. flavicarpa Deg.), comparing organic and conventional production systems. To estimate technical coefficients, planting and production costs, and profitability indicators of culture, the data were surveyed from technicians of the region and based in experimental work, carried out at the Experimental Farm of lguaterm from the Maringa State University, in the period of june/2002 to july/2004. The total production costs of the culture in two agricultural years reached a value 12.94% higher for the conventional system, and in this same period the medium index of profitability was 21.39% higher for the organic system. The organic production system was economically feasible and provided a larger index of profitability.

Genetic variations among passion fruit species using rapd markers

Foram avaliadas as variações genéticas através de marcadores moleculares RAPD, as seguintes espécies de maracujá: Passiflora amethystina, P. caerulea, P. cincinnata, P. coccinea, P. serrato digitata, P. foetida, P. maliformis, P. alata, P. giberti, P. laurifolia, P. macrocarpa, P. nitida, P. setacea, P. suberosa, P. ligularis, P. capsularis, P. edulis Sims e sua variedade botânica P. edulis Sims f. flavicarpa Deg. Neste estudo, a análise dos produtos da amplificação ao acaso do DNA polimórfico (RAPD) foi usada para estimar a diversidade genética e as relações taxonômicas entre as espécies. Foram utilizados 21 primers, que produziram um total de 270 bandas polimórficas. Verificou-se que as espécies de Passiflora apresentaram uma média de similaridade de 17,3%, e entre Passiflora edulis Sims e Passiflora edulis Sims f. flavicarpa, de 34,35%. Pode-se perceber que o valor de similaridade dentro da espécie edulis é baixo, ilustrando a grande variação entre a forma amarela e a roxa de Passiflora edulis.

Changes in the aroma of organic passion fruit (Passiflora edulis Sims f. flavicarpa Deg.) during ripeness

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Produção de mudas de maracujazeiro-amarelo por enxertia hipocotiledonar sobre sete espécies de passifloras

The yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg.) Passifloraceae is the main crop in Brazil, and the crop has found some difficulties, particularly concerned to the orchards longevity, which has been reduced due to diseases and nematodes that attack the root system. This study was carried out to establish technologies for the production of seedlings of yellow passion fruit by hypocotyledonary grafting on seven rootstocks. The treatments used as rootstocks were: P. edulis f. flavicarpa, P. caerulea, P. alata, P. giberti, P. coccinea, P. cincinnata and P. setacea. The experimental design was completely randomized, with 36 replications for each rootstock. The percentage of graft survival, plant height, number of leaves and rootstock diameter were the characteristics evaluated. The hypocotyledonary grafting methodology was successful for most species tested. P. caerulea, P. giberti, P. cincinnata and P. flavicarpa were the stood out rootstocks by their high conditions of plants growth, and by their early plants production.

Evaluation and development of passion fruit (Passiflora alata Dryander) propagated by cutting and seet in conditions of commercial orchard

The present work was conducted in a fruit tree propagation area of the Plant Production Department of the Faculdade de Ciencias Agrarias e Veterinarias, Universidade Estadual Paulista (FCAV/UNESP) in Jaboticabal, SP, and also in a commercial orchard in Araguari, MG, with the objective to verify the potential of vegetative growth (stem diameter, height of plants and leaf number) of plants of passion fruit (Passiflora alata Dryander), gotten by cutting and seed, comparing the initial development of plants in the field. This experiment was carried out from January 2002 to February 2003. The experiment using seeds was conducted at a shadow house, and the one that used cuttings in an intermitent mist. The cuttings and seeds were collected from adult plants which came from Passifloraceae Active Germoplasm Bank (BAG) of the Plant Production Department of FCAC/UNESP. For the cuttings, it was used the intermediate part of the branches in stadium of vegetative growth. The seeds, in order to obtain the seedlings, had been sown in plastic trays. Cuttings and seedlings were transplanted to plastic bags with substrate in shadow house and with daily irrigation. They were acclimatized and planted on field, after 60 days. on field, the stem diameter, plant height and number of leaves were better for cuttings than for seedlings in Jaboticabal, SP. In Araguari, MG, stem diameter was larger in the seedlings, which plant heights and number of leaves were larger on cuttings.

Custo de produção do maracujá-amarelo (Passiflora edulis)

Objetivou-se analisar economicamente a cultura do maracujá-amarelo (Passiflora edulis) na região de Marília-SP, safra de 2010/2011. Foram utilizadas estruturas do custo operacional efetivo e custo operacional total referente à fase de implantação e condução da lavoura por unidade de área e cinco indicadores de rentabilidade. Identificou-se um custo total de produção de R$ 37.751,67 por hectare ou R$ 1,89 por quilo da fruta. Os itens do custo operacional efetivo que mais oneraram o sistema de produção corresponderam às operações de máquinas (31,1%) e mão de obra (23,5%). Os indicadores de rentabilidade mostraram-se desfavoráveis para o sistema produtivo analisado, em decorrência, principalmente, do alto preço dos insumos e práticas para controle de doenças. Há necessidade de adequações técnicas relacionadas com o manejo fitossanitário da cultura para a redução do custo total de produção de modo a tornar a atividade rentável.

Volatile compounds from organic and conventional passion fruit (Passiflora edulis F. Flavicarpa) pulp

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)