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Development of pollen grain in yellow passion-fruit (Passiflora edulis f. flavicarpa; Passifloraceae)
Souza, Margarete Magalh?es de;Pereira, Telma Nair Santana;
Genetics and Molecular Biology , 2000, DOI: 10.1590/S1415-47572000000200037
Abstract: to clarify events occurring during pollen grain formation in yellow passion-fruit (passiflora edulis f. flavicarpa), floral buds were collected at different stages of development. after bracket, petal and sepal removal the anthers were fixed, dehydrated, embedded in paraffin wax, sectioned at 10 mm and after differential dying with safranin o and fast green, mounted in canada balsam and observed under optical microscope. formation of the male gamete followed the normal pattern for angiosperms. observation covered final sporogenic mass phase up to pollen grain formation; microsporangium tissue modifications were also observed. microsporogenesis was characterized by sporogenic tissue differentiation in microsporic mother cells, followed by meiosis and resulting in tetrads. microgametogenesis began with callose microspore release, subsequent mitosis, in addition to radial and tangential tapetum wall degradation, parietal layer compression nearer to the tapetum and endothecium widening, terminating in mature pollen grain formation.
Development of pollen grain in yellow passion-fruit (Passiflora edulis f. flavicarpa; Passifloraceae)  [cached]
Souza Margarete Magalh?es de,Pereira Telma Nair Santana
Genetics and Molecular Biology , 2000,
Abstract: To clarify events occurring during pollen grain formation in yellow passion-fruit (Passiflora edulis f. flavicarpa), floral buds were collected at different stages of development. After bracket, petal and sepal removal the anthers were fixed, dehydrated, embedded in paraffin wax, sectioned at 10 mum and after differential dying with safranin O and fast green, mounted in Canada balsam and observed under optical microscope. Formation of the male gamete followed the normal pattern for angiosperms. Observation covered final sporogenic mass phase up to pollen grain formation; microsporangium tissue modifications were also observed. Microsporogenesis was characterized by sporogenic tissue differentiation in microsporic mother cells, followed by meiosis and resulting in tetrads. Microgametogenesis began with callose microspore release, subsequent mitosis, in addition to radial and tangential tapetum wall degradation, parietal layer compression nearer to the tapetum and endothecium widening, terminating in mature pollen grain formation.
Yellow passion fruit seed oil (Passiflora edulis f. flavicarpa): physical and chemical characteristics
Malacrida, Cassia Roberta;Jorge, Neuza;
Brazilian Archives of Biology and Technology , 2012, DOI: 10.1590/S1516-89132012000100016
Abstract: the aim of this study was to determine the chemical composition -physico-chemical properties, fatty acid and tocopherol compositions and total phenolic compounds -and evaluate the radical-scavenging activity of crude oil extracted from passion fruit (passiflora edulis f. flavicarpa) seeds, aiming to use the agro-industrial by-products. the oil seed extraction was performed by soxhlet method and the oil yield from the seeds was 30.39%. the oil showed high levels of unsaturated fatty acids (87.59%), including mainly linoleic (73.14%) and oleic (13.83%) acids, tocopherol (499.30 mg/kg) and phenolic compounds (1,314.13 mg gae/kg). the physico-chemical characteristics were similar to those of other edible oils and the oil showed significant antioxidant activity. therefore, the potential utilization of the passion fruit seed oil as a raw material for food, chemical and pharmaceutical industries could be favorable.
Embryo sac development in yellow passion fruit Passiflora edulis f. flavicarpa (Passifloraceae)
Souza, Margarete Magalh?es de;Pereira, Telma Nair Santana;Hoffmann, Magali;Melo, Edésio J.T. de;Louro, Ricardo Pereira;
Genetics and Molecular Biology , 2002, DOI: 10.1590/S1415-47572002000400017
Abstract: the yellow passion fruit, passiflora edulis f. flavicarpa, is one of the most important brazilian fruit crops. it is an allogamous, diploid, and self-incompatible species. it has hermaphrodite, solitary flowers, located in the leaf axils and protected by leaf bracts. the flower has an androgynophore, which is a straight stalk supporting its reproductive parts. there are usually five anthers, located at the tip of each of the five filaments. the ovary is borne just above the filaments, at the top of the androgynophore; there are three styles that are united at their base, and at the top there are three stigmas. the objective of this research was to observe embryo sac development in yellow passion flowers. ovaries at different stages of development were fixed in faa (formalin, acetic acid and alcohol solution), hydrated, stained with mayer?s hemalum, and dehydrated. ovules were cleared by using methyl salicylate, mounted on slides, and observed through a confocal scanning laser microscope. the yellow passion fruit ovule is bitegmic, crassinucellate, and anatropous, and its gametophyte development is of the polygonum type. after meiosis, functional megaspores under go three successive mitotic divisions, resulting in an eight-nucleate megagametophyte: the egg apparatus at the micropylar end, two polar nuclei at the cell center, and three antipodals at the chalazal end. the egg apparatus is formed by an egg cell and two synergids, each with a filiform apparatus. the mature embryo sac has an egg cell, two synergids, two polar nuclei, and three antipodes, as has been described for most angiosperms.
Embryo sac development in yellow passion fruit Passiflora edulis f. flavicarpa (Passifloraceae)  [cached]
Souza Margarete Magalh?es de,Pereira Telma Nair Santana,Hoffmann Magali,Melo Edésio J.T. de
Genetics and Molecular Biology , 2002,
Abstract: The yellow passion fruit, Passiflora edulis f. flavicarpa, is one of the most important Brazilian fruit crops. It is an allogamous, diploid, and self-incompatible species. It has hermaphrodite, solitary flowers, located in the leaf axils and protected by leaf bracts. The flower has an androgynophore, which is a straight stalk supporting its reproductive parts. There are usually five anthers, located at the tip of each of the five filaments. The ovary is borne just above the filaments, at the top of the androgynophore; there are three styles that are united at their base, and at the top there are three stigmas. The objective of this research was to observe embryo sac development in yellow passion flowers. Ovaries at different stages of development were fixed in FAA (formalin, acetic acid and alcohol solution), hydrated, stained with Mayer?s hemalum, and dehydrated. Ovules were cleared by using methyl salicylate, mounted on slides, and observed through a confocal scanning laser microscope. The yellow passion fruit ovule is bitegmic, crassinucellate, and anatropous, and its gametophyte development is of the Polygonum type. After meiosis, functional megaspores under go three successive mitotic divisions, resulting in an eight-nucleate megagametophyte: the egg apparatus at the micropylar end, two polar nuclei at the cell center, and three antipodals at the chalazal end. The egg apparatus is formed by an egg cell and two synergids, each with a filiform apparatus. The mature embryo sac has an egg cell, two synergids, two polar nuclei, and three antipodes, as has been described for most angiosperms.
Biological aspects of Tetranychus marianae McGregor (Acari, Tetranychidae) reared on yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg.) leaves
Noronha, Aloyséia C. da S.;
Revista Brasileira de Zoologia , 2006, DOI: 10.1590/S0101-81752006000200014
Abstract: the passion fruit plant is a host for several different phytophagous mites, mainly those belonging to the tarsonemidae, tenuipalpidae and tetranychidae families. among the tetranychidae species are tetranychus mexicanus (mcgregor, 1950) and tetranychus desertorum banks, 1900. the occurrence of tetranychus marianae mcgregor, 1950 was detected on yellow passion fruit passiflora edulis sims f. flavicarpa degener plants under field and greenhouse conditions at the headquarters of embrapa cassava & fruits tropical research in cruz das almas county, state of bahia, northeast brazil. prior records of t. marianae on the passion fruit crop in brazil as well as the biological aspects of this species are unknown. the study on the biology of t. marianae on p. edulis f. flavicarpa was carried out under controlled environmental condition of 25 ± 1oc temperature, 80 ± 10% rh and 12 hours photophase. the egg to adult time span lasted 10.73 ± 0.18 days, with a 92% survival figure. the sexual ratio was 81% females. the mean female longevity was 24.53 days and the daily mean oviposition was 3.69 eggs/female. the intrinsic rate of increase (rm) was 0.172; the finite rate of increase (l) was 1.187 individuals/female/day; the mean time span of one generation (t) was 22.81 days; and the net rate of reproduction (ro) was 50.14.
ANáLISIS DE SENDERO PARA ALGUNAS PROPIEDADES DEL FRUTO DE MARACUYá (Passiflora edulis f. flavicarpa Deg.) PATH ANALYSIS FOR SOME FRUIT PROPERTIES OF PASSION FRUIT (Passiflora edulis f. flavicarpa Deg.)  [cached]
Miguel Espitia C.,Luz E. Vargas O.,Guillermo Martínez F
Revista U.D.C.A Actualidad & Divulgación Científica , 2008,
Abstract: En Colombia, no se han reportado estudios sobre análisis de sendero para maximizar el progreso por selección en el mejoramiento de maracuyá (Passiflora edulis f. flavicarpa Deg.). El estudio tuvo como objetivos realizar dos análisis de sendero, uno para el peso del fruto (PFR) y otro para el peso de la semilla con arilo (PSC) del fruto de maracuyá, bajo las condiciones que presenta la ciudad de Montería (Córdoba, Colombia). Se utilizaron las correlaciones fenotípicas y genéticas originadas del análisis de 400 frutos, obtenidos de diez lotes comerciales, diez plantas / lote y cuatro frutos / planta (repeticiones), bajo un dise o anidado con frutos dentro de planta y plantas dentro de lotes. El análisis de sendero para PFR se aló que los efectos directos fueron positivos y 2,28 a 16,50 veces, los indirectos, cuando se usaron las correlaciones fenotípicas y 1,93 a 6,90 veces cuando se utilizaron las genéticas. El peso de la cáscara (PCA) fue la variable que mostró el mayor efecto directo sobre el PFR. El análisis para el PSC, al utilizar las correlaciones fenotípicas o genéticas, se aló que en el PFR los efectos directos fueron 3,2 a 80 veces los indirectos. El PFR fue la variable que mostró el mayor efecto directo sobre el peso de la semilla con arilo. Los efectos indirectos vía PFR fueron mayores que los directos en todas las otras variables. El peso del fruto, se puede usar como criterio de selección para la obtención de cultivares de alto rendimiento de PSC del fruto en maracuyá In Colombia, no studies of path analysis to maximize the selection progress in passion fruit (Passiflora edulis f. flavicarpa Deg.) breeding have been reported. The objectives of this work were, therefore, to estimate two path analysis, one for weight per fruit and the other one for seed weight with aril under environmental conditions of the city of Montería (Cordoba, Colombia). Genetic and phenotypic correlations obtained from the analysis of 400 fruits, collected from ten commercial lots, ten plants/lot and four fruits/plant (repetitions) were used under a hierarchical design with plants within lot and fruits within plant. Path analysis for weight per fruit showed that the direct effects were positive and 2.28 to 16.50 times, compared to indirect effects, when phenotypic correlations were used and, 1.93 to 6.90 times, when genetic correlations were employed. Peel weight was the variable that caused the largest direct effect on fruit weight. Path analysis for seed weight with aril, when the phenotypic or genetic correlations were used, showed that in fruit weight the direct ef
Hunter color dimensions, sugar content and volatile compounds in pasteurized yellow passion fruit juice (Passiflora edulis var. flavicarpa) during storage
Sandi, Delcio;Chaves, José Benício Paes;Sousa, Ant?nio Carlos Gomes de;Parreiras, June Ferreira Maia;Silva, Marco Túlio Coelho da;Constant, Patrícia Beltr?o Lessa;
Brazilian Archives of Biology and Technology , 2004, DOI: 10.1590/S1516-89132004000200011
Abstract: changes in hunter l, a and b values, glucose, fructose and sucrose contents, concentration of four volatile compounds (ethyl butirate, ethyl caproate, hexyl butirate and hexyl caproate) and furfural, were studied in yellow passion fruit juice (passiflora edulis var. flavicarpa) pasteurized at 75oc/60s, 80oc/41s or 85oc/27s, during storage at room temperature (25±5oc) and refrigeration (5±1oc) for 120 days. while the sucrose content decreased, the glucose and fructose contents increased significantly over storage time. the hunter l and b values behaved similarly, with a tendency to decrease over time, inversely to hunter a value. volatile compound concentrations also decreased over time, inversely to the furfural content. pasteurization at 85oc/27s resulted minimum changes in the studied passion fruit characteristics, while that at 75oc/60s was the most harmful. storage under refrigeration tended to keep the best quality characteristics of the juice.
MISTURAS VITAMíNICAS NA REGENERA??O DO MARACUJAZEIRO AMARELO (Passiflora edulis f. flavicarpa Deg.)
Ribas, Alessandra Ferreira;Denis, Francine;Quoirin, Marguerite;Ayub, Ricardo Antonio;
Ciência Rural , 2002, DOI: 10.1590/S0103-84782002000200009
Abstract: cotyledons were used as explants in order to test the effect of different vitamin mixtures and bap concentrations on yellow passion fruit (passiflora edulis f. flavicarpa deg.) in vitro direct organogenesis. they basal medium was constituted of ms salts, supplemented with 1 and 2mg. -1 of bap (6-benzilaminopurina). vitamin mixtures ms and b5 were tested. every assay was done with 60 explants. the data were analyzed by tukey's test. the medium supplemented with b5 vitaminic complex induced an increase of the capacity of cotyledons to regenerate in the presence of both bap concentrations, as well for the number of explants with buds as for the number of buds per explant. the analysis of ploidy level of regenerated plants showed a number of chromosomes apparently normal and typical for this specie (2n=18).
Primer reporte de la mancha bacteriana en parchita (Passiflora edulis Sims f. flavicarpa) en Venezuela First report of bacterial blight of passion fruit (Passiflora edulis Sims f. flavicarpa) in Venezuela
Yoleidy Escalona,Nancy Contreras
Bioagro , 2011,
Abstract: El cultivo de la parchita maracuyá es afectado por diversos tipos de enfermedades. La planta, en la localidad de Aroa (estado Yaracuy) ha presentado da os en forma de manchas húmedas en las hojas. Con la finalidad de determinar la identidad del agente causal de esta enfermedad se llevó a cabo el presente trabajo. Hojas sintomáticas fueron llevadas al laboratorio, se desinfectaron con NaOCl al 2% y se obtuvo el aislamiento de una bacteria color amarillo pálido en los medios Agar nutritivo (AN) y extracto de levadura-dextrosa-carbonato de calcio (YDC), la cual fue inoculada en plantas sanas de parchita. Una vez reproducidos los síntomas 15 días después de la inoculación, se procedió al reaislamiento obteniéndose colonias idénticas a las originales y se realizó la identificación de la bacteria mediante características culturales, morfológicas, fisiológicas y bioquímicas. Se encontró una bacteria con forma de bastón, Gram negativa, aeróbica, con reacción positiva a catalasa, hidrólisis del almidón, producción de H2S, crecimiento a 35°C, hidrólisis de esculina, licuefacción de gelatina y digestión de proteínas; con reacción negativa al bactofenol rojo dextrosa agar, oxidasa, producción de ureasa y reducción de nitratos; produjo ácidos a partir de arabinosa, glucosa, manosa, celobiosa, fructosa, galactosa y trehalosa; creció en los medios SX y Tween. Todas estas características permitieron identificar el agente causal como Xanthomonas axonopodis pv. passiflorae (Pereira) Gon alves & Rosato, constituyendo este trabajo el primer reporte de la bacteria en el cultivo de la parchita en Venezuela. The cultivated passion fruit (Passiflora edulis Sims f. flavicarpa) is affected by several kinds of diseases. At the locality of Aroa, Yaracuy State, the plant has shown damages such as leaf spots, and this work was carried out to determine the identity of the causal agent of this disease. Symptomatic leaves were collected and transferred to the laboratory, disinfected with 2 % NaOCl and the isolation of a pale yellow bacteria was obtained on nutrient agar (NA) and yeast extract-dextrose-calcium carbonate ( YDC), which was inoculated into healthy plants of passion fruit. Once reproduced the symptoms, 15 days after inoculation, we proceeded to re-isolation obtaining colonies identical to the original ones, and the identification of the bacteria was obtained by its cultural, morphological, physiological, and biochemical characteristics. The isolated bacterium was Gram negative, with a rod shape, aerobic; with positive reaction for catalase, starch hydrolysis, production of
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