Neusa Maria Colauto Stenzel

Caracterização agromorfológica do maracujazeiro (Passiflora spp.)

The germoplasm evaluated is composed by 55 accessions of P. edulis, P. alata, P. coccinea, P. caerulea, P. foetida, P. giberti, P. macrocarpa, P. macrocarpa x P. alata, P. serrato digitata and P. suberosa; and one Passiflora sp. accession. On isolated plants field cultivated under trellising system, 22 morphological descriptors were studied. The phylogenetic relationships evaluated by the Principal Component Analysis and genetic distances showed a wide genetic diversity among the species studied. Monomorphics characters were showed by some species. Important variability is observed within P. alata and P. edulis and small divergences are found between accessions of the flavicarpa form.

Nutrição e produção da laranjeira "Folha Murcha" em porta-enxertos e plantas de cobertura permanente na entrelinha

The nutritional status and yield of citrus are not known for different canopy/rootstocks and soil groundcover management systems. The study was set up in a 8-year-old ‘Folha Murcha’ [Citrus sinensis (L.) Osb.] orange experiment, and was carried out from 1997 to 2002 in Paranavai, in the northwest region of the state of Parana (southern Brazil). The soil corresponds to a sandy loam Paleudult. The experimental design was in random blocks and seven rootstocks: ‘Rangpur’ lime, ‘African’ rough lemon, ‘Volkamer’ lemon, ‘Cleopatra’ mandarin, ‘Sunki’ mandarin, ‘C-13’ citrange and Trifoliate orange. Leaf nutrient contents and fruit yield were evaluated in ‘Folha Murcha’ orange. The experimental plots are three plants, witch showed up bahiagrass (Paspalum notatum) in three blocks and a legume (Arachis pintoi) in one block between rows in the grove. The soil groundcover management systems with legume increased leaf N at excessive class on ‘Rangpur’ lime, and reduced the fruit yields of the ‘Folha Murcha’ orange tree in relation the bahiagrass. In the interrows whit bahiagrass fruit yields ‘Folha Murcha’ orange it was dependent of the harvest and leaf Ca, Mg and Zn. The maximum absorption of leaf Ca for the rootstocks by orange ‘Folha Murcha’ it precedes leaf Mg and Zn. In these conditions, the results showed higher fruit yields in ‘Cleopatra’ mandarin and ‘African’ rough lemon orange plants onto ‘Folha Murcha’.

PRODUÇÃO E QUALIDADE DE FRUTOS HÍBRIDOS DE MARACUJAZEIRO-AMARELO NO NORTE DO PARANÁ

ABSTRACTNowadays there are fourteen cultivars of yellow passion fruit on the National Register of Cultivars of the Brazilian Ministry of Agriculture. The improvement of plant breeding in this crop is of great importance to provide new cultivars adapted to the producing regions. Thus, the aim of this study was to evaluate the production and fruit quality of thirteen hybrids of yellow passion fruit plants grown in the northern Parana. The evaluations were performed during two cycles of crop production from April to July 2009 and from January to July 2010 with weekly harvests of ripe fruits. The production was determined by weighing the total output and counting the number of fruits per plant. The evaluated quality characteristics of the fruits were: weight, length, diameter, diameter/length ratio, thickness, pulp yield, total soluble solids (TSS), total titratable acidity (TTA ) and TSS/TTA ratio. Hybrids ‘66’ and ‘65’ respectively showed the highest yield and greatest number of fruits in the accumulated of the two crops. The fruits of the hybrid ‘72’ stood out on desirable quality characteristics for fresh consumption, while the hybrid ‘69’ showed important features for the juice industry.

Tamanho de recipientes e tempo de formação de mudas no desenvolvimento e produção de maracujazeiro-amarelo

The size of containers and the period of seedling formation in the nursery are factors directly related with the quality of passion fruits seedlings, but it is important also to check out if the development in the nursery is reflected in the performance of adult plants in the field. . The aim of this study was to evaluate the effect of the size of containers and the period of seedling formation in yellow passion fruit development and production. The experimental design was a randomized block, arranged in a factorial 3 (sizes of containers) x 3 (periods of seedling formation) with four replications and four plants per plot. The containers evaluated had volume of 400, 800 to 1,200 cm3 and the seeds were sowed in March, April and May. The seedlings were transplanted to the field in September, at the age of 180, 150 and 120 days old. The height of the seedlings in the transplant, total crop production, number of fruits per plant and fruit mass during the first cycle of crop production were evaluated. The vegetative growth of the seedlings is proportional to the size of the container and to the time for formation. Sowing in May in 1,200 cm3 is more appropriate because plants have higher or equal fruit production to the other treatments in a shorter period of formation in the nursery.

Chromosome stickiness during meiotic behavior analysis of Passiflora serrato-digitata L. (PassifloraCEAE).

Almost 90% of species of the genus Passiflora are native to the American continent, with high commercial value due to the fact that some species are used for human food while others have ornamental and medical qualities. Passiflora serrato-digitata is one of the species that integrates the Parana Agronomic Institute germoplasm bank at its experimental base in Londrina, PR, Brazil. Collected flower buds were fixed in ethanol/acetic acid (3:1 v/v) for 24h, transferred to 70% alcohol and stored under refrigeration. Slides were prepared by the squashing technique and stained with 1.0% propionic carmine; they were analyzed under an optic microscope. Irregularities in the chromosome segregation process of P. serrato-digitata have been verified by meiotic behavior analysis. These comprised precocious migration to poles in metaphase I and II, non-oriented chromosomes in metaphase plate in metaphase I and II, laggard chromosomes in anaphase I and II towards the formation of micronucleus in telophase I and II, and microspores in tetrads. Chromosome stickiness was another irregularity reported in the Passiflora genus for the first time. These irregularities which also contributed to the formation of monads, dyads and triads, resulted in normal imbalanced 2n and 4n microspores. According to the observed Meiotic Index of 71.83%, this species is not meiotically stable.