Silvana de Paula Quintão Scalon

UFGD - Universidade Federal da Grande Dourados, Dourados, Mato Grosso do Sul, Brazil

Are you Silvana de Paula Quintão Scalon?

Claim your profile

Publications (86)31.26 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: A salinidade é fator limitante para que ocorra germinação na maioria das espécies sendo necessários estudos que avaliem a interação entre plantas e o ambiente salino ao qual estão associadas. O presente estudo consistiu em avaliar a germinação e características de vigor em Salvia splendens submetidas à salinidade. As sementes foram expostas a diferentes potenciais osmóticos, simulando condições de estresse salino, provocado por NaCl, CaCl2 e KCl nos potenciais de 0; -0,4; -0,8; -1,2; -1,6 e -2,0 MPa. De modo geral, pode-se observar que o CaCl2 resultou em melhores resultados para todas as variáveis analisadas, provavelmente ligado ao efeito positivo do Ca2+ no metabolismo celular, permitindo germinação 60,81% no potencial osmótico de -1,35 MPa.
    04/2015; 21(1):105. DOI:10.14295/rbho.v21i1.782
  • [Show abstract] [Hide abstract]
    ABSTRACT: Despite the economic importance of Crambe abyssinica, the present study is the first report on bees that occur with this species, and could aid in developing alternative methods for controlling insect pests without seriously impacting pollinators. The present study examined the following questions: (1) Which species are potential pollinators of C. abyssinica? (2) How do environmental conditions influence pollinator visitation fluctuations? Insects were sampled on a weekly basis between 08:00 and 16:00 during five weeks of flowering. When the results of analyses of variance were significant, the data was adjusted using regression equations at a 5% level of probability; the environmental variables were examined using Pearson's correlation coefficient. Apis mellifera, Geotrigona mombuca, Exomalopsis (Exomalopsis) fulvofasciata, Plebeia sp. and Dialictus sp. were observed visiting C. abyssinica flowers. A. mellifera and G. mombuca were observed to be potential pollinators, with the former demonstrating visitation peaks during flowering weeks II and IV at 12:00 and 08:00, respectively and the latter visiting during weeks III and IV at 12:00 and 10:00, respectively. Environmental factors such as temperature, relative humidity, and wind speed have different effect on the activity of bees.
    Anais da Academia Brasileira de Ciências 03/2015; 87(1):137-45. DOI:10.1590/0001-3765201520130365 · 0.88 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Resumen El objetivo de este trabajo consistió en evaluar el efecto de los pre-tratamientos con giberelinas, la humedad inicial del sustrato y la temperatura de incubación sobre la germinación de Psidium guineense Swartz. Las semillas se sometieron a cuatro tratamientos previos con giberelina (GA 3) (50 y 100 mg L -1) y agua destilada durante 24 horas y un control. La siembra se hizo en papel Germitest ® humedecido con agua destilada a niveles de humedad correspondientes a 1,5 y 2,5 veces el peso de papel seco. Luego las semillas se incubaron a temperaturas constantes (25 y 30 °C) y a temperaturas variables (20-30 °C). El procedimiento estadístico utilizado fue un diseño factorial 4 x 2 x 3 (pre-tratamiento x humedad inicial del sustrato x temperatura) completamente al azar con cuatro repeticiones de 25 semillas cada una. La germinación de las semillas y el crecimiento de las plántulas de P. guineense no se vieron afectados por los tratamientos pre-germinación. Para una germi-nación y crecimiento óptimos las semillas de P. guineense deberían sembrarse a temperaturas de 20-30 o 25 °C y a una humedad del sustrato de 1,5 o 2,5 veces la masa del papel seco. Summary Efecto de pre-tratamientos sobre la germinación de semillas y crecimiento de plántulas Psidium guineense Swartz
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this research was to evaluate the quality and photosynthetic metabolism of "uvaia" seedlings (Eugenia pyriformis Cambess.) on different substrates and water regimes. The seeds were sown in tubes of 50 x 190 mm in the following substrates: Sand (S), Latosol + Sand (L + S) (1:1), Latosol + Sand + Semi Decomposed Poultry Litter (L + S1 + PL) ( 1:1:0.5), Latosol + Sand + Semi Decomposed Poultry Litter (L + S2 + PL) (1:2:0.5), Latosol + Bioplant® (L + B) (1:1), and the water levels assessed were 50, 75 and 100% of water retention capacity. At 60, 90, 120 and 150 days the seedlings were evaluated according to their chlorophyll index, leaf area (cm2) and Dickson Quality Index (DQI) and at 150 days their internal concentration of carbon (mol m-2 s-1), stomatal conductance (mol m-2 s-1), transpiration rate (mmol m-2 s-1), photosynthesis (µmol m-2 s-1) and efficiency of water use (µmol de CO2 / mmol de H2O). Until their 150th days, the seedlings had higher quality and photosynthetic metabolism when cultured with substrates containing latosol + sand + poultry litter on the two variations assessed and water retention capacity of 50%.
    Anais da Academia Brasileira de Ciências 11/2014; DOI:10.1590/0001-3765201420130249 · 0.88 Impact Factor
  • Daiane M Dresch, Silvana P Q Scalon, Tathiana E Masetto
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to evaluate the effect of pre-treatments on overcoming dormancy of A. coriacea seeds. Seeds were processed and stored in polyethylene bags at temperatures of at -18°C (42% RH), 5°C (34% RH), 15°C (60% RH) and 25°C (34% RH), during 0, 30, 60, 90, 120 and 150 days. After storage, seeds were immersed in 350 mg.L-1 gibberellic acid for 144 hours. Sowing was carried out in plastic bags containing Red Latosol + Bioplant®. Moisture content, emergence percentage, emergence speed index, length and dry mass of seedlings, were evaluated. The experimental design was completely randomized in a factorial with four replications of 50 seeds each. The seed storage at 5°C and subsequent immersion in gibberellic acid was efficient to reach high percentage, emergence speed and plant growth. A. coriacea seeds showed non-deep simple morphophysiological dormancy wherein the physiological component can be overcome after the seeds are storage at 5°C for a maximum period of 53 days and subsequent immersed in exogenous GA (350 mg.L-1 for 144 hours).
    Anais da Academia Brasileira de Ciências 10/2014; DOI:10.1590/0001-3765201420130276 · 0.88 Impact Factor
  • Tathiana Elisa Masetto, Silvana de Paula Quintão Scalon
    01/2014; 21(1):62-68. DOI:10.4322/floram.2014.012
  • 01/2014; 17(2):177-184. DOI:10.1590/bjft.2014.013
  • Revista Árvore 01/2014; 38(1):145-153. DOI:10.1590/S0100-67622014000100014 · 0.40 Impact Factor
  • Revista Brasileira de Plantas Medicinais 01/2014; 16(1):10-17. DOI:10.1590/S1516-05722014000100002
  • American Journal of Plant Sciences 01/2014; 05(17):2591-2598. DOI:10.4236/ajps.2014.517273
  • American Journal of Plant Sciences 01/2014; 05(17):2555-2565. DOI:10.4236/ajps.2014.517269
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The interest for crambe emerged from its superiority in relation to soybean and other oilseeds for vegetable oil production and its great adaptability for the direct planting. This work aimed to evaluate the storage of the crambe seeds in different packagings and environments. Polyethylene bags and rigid plastic packaging with hermetic sealingwere tested in the following conditions: laboratory (25 ± 2 ºC e 60% RH) and dry and cold chamber (15 ± 2 ºC e 45% RH), during 0, 30, 60, 90, 120, 150 and 180 days (May to November, 2010). Seed water content, first count, seed germination, germination speed index and seed germination medium time were evaluated monthly. The experiment was carried out with four replications using 50 seeds in each treatment. Initially, seeds showed 60% germination and 7.0% moisture content. The packagings and environments tested allowed alterations in seed water content which, possibly, provided the beginning of seed deterioration, which was assessed through the reduction of the first count, speed index and increase in the germination average time. However, the treatments and the storage periods did not influence the seed germination. In general, crambe seeds can be stored in impermeable packaging during 180 days at 15 ± 2 ºC and 45% RH.
    10/2013; 60(5):646-652. DOI:10.1590/S0034-737X2013000500007
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The knowledge on biometric aspects of fruits and seeds and their influence on germination are important for the production and properties of native species. This study aimed at evaluating the influence of fruit and seed size on the germination and vigor of Campomanesia adamantium seeds. For the biometric characterization, 120 fruits were randomly selected and visually divided into four classes, with predominance for size, in which longitudinal and transversal diameters and mass of seeds were measured. The seed characterization was carried out in 30 fruits of each class, by determining the number of whole, empty and total seeds of every fruit. The seeds physiological potential, according to fruit size, was evaluated with the aid of the following tests: imbibition curve, moisture content, germination percentage and speed index, seedling length, total fresh and dry matter of seedlings. A completely randomized design, with four treatments, was used. Fruits were respectively classified according to their longitudinal and transversal diameters as small (12.71 mm; 12.46 mm), medium small (15.38 mm; 15.01 mm), medium large (18.84 mm; 18.02 mm) and large (22.74 mm; 22.36 mm). The classes of small, medium small and medium large fruits presented seeds with higher germination percentage and speed index, while seedlings with higher biomass accumulation were observed for large fruits.
    09/2013; 43(3):262-271. DOI:10.1590/S1983-40632013000300006
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Canafístula is an important native forest species, found in Cerrado, which still lacks on nutritional information and obtaining quality seedlings. Therefore, this study aimed to evaluate the effects of the addition of nitrogen and phosphorus on initial growth and seedling quality of canafístula (Peltophorum dubium Spreng. Taub.) grown in Oxisol. The experiment was carried out in 4 dm3 pots with treatments arranged in 4x4 factorial scheme, with four N levels (0, 20.82, 41.64 and 62.46 mg kg-1 N) and four P levels (0, 41.72, 83.72 and 125.16 mg kg-1 of P2O5) in a randomized block design with three replications. Were evaluated the growth characteristics (height, stem diameter and dry mass of shoots and roots) and quality parameters of seedlings (ratio height/diameter RAD; ratio dry mass of shoot / root dry weight RPAR, and Dickson Index). There was significant interaction between N and P for all growth characters and quality parameters evaluated. The highest level of N and P showed higher growth of seedlings. However, regarding the quality of seedlings, the Dickson index indicated that the phosphorous is the most important element.
    Revista Árvore 08/2013; 37(4):717-724. DOI:10.1590/S0100-67622013000400015 · 0.40 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Obtaining native seedlings requires information about seeds harvest time, storage and luminosity conditions, germination and types of substrate, among others. This study aimed at evaluating the luminosity demands for the initial growth of Caesalpinia ferrea Mart. ex. Tul. var. leiostachya Benth (Fabaceae-Caesalpinioideae) seedlings submitted to different shading levels, at 60 days after transplant (DAT). The experimental design was completely randomized, in 3x5 factorial scheme (three shading levels: 0%, 50% and 70%; and five evaluation times: 60, 90, 120, 150 and 180 DAT), with four replications of 10 seedlings per experimental unit. Plants grown under the shading level of 70% presented the highest contents for total chlorophyll (38.79 µg cm-2), leaf area ratio (51.54 g cm-2), relative growth rate (0.0322 g g-1 day-1) and leaf weight ratio (0.2708 g g-1). The highest values for stem height (110.34 cm) and base diameter (9.3 mm), and root (11.13 g), leaf (5.59 g) and shoot (16.05 g) dry matter, as well as leaf area (705.25 cm2), were observed in the plants cultivated under the shading level of 50%. No differences were observed for root growth, specific leaf weight, net assimilation rate and specific leaf area, concerning the different shading levels tested (averages of 9.3 cm, 0.0082 g cm-2, 0.0006 g cm-2 day-1 and 186.24 g cm-2, respectively). The Caesalpinia ferrea seedlings presented a better growth rate when cultivated under the shading level of 50%.
    06/2013; 43(2):178-186. DOI:10.1590/S1983-40632013000200012
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper aimed to evaluate the effects of storage periods on the conservation of Pachyrhizus ahipa roots at different temperatures and packaging materials. The roots were harvested, washed, packed in PVC, plastic bags, without wrappings (control) and stored in polystyrene trays in refrigerators, or cold chambers, or at room temperature. Total titratable acidity (TTA), total soluble solids (TSS), pH, as well as their ash, lipid, total carbohydrate and protein (dry basis) contents were analyzed. The lowest loss of root fresh weight was observed in the cold chamber and plastic bags. The TTA remained higher among roots stored in the cold chamber and in PVC packaging. The lowest TSS contents were observed for roots stored in the cold chamber, and these did not vary among the packing materials. The average carbohydrate content percentage for all treatments was 84.9%. The percentage of lipids was highest in roots stored at room temperature while protein and ash contents were highest in roots under refrigeration. The best storage conditions for roots are plastic bags packaging in a cold chamber, with the roots retaining appropriate quality for commercialization for up to 30 days.
    Anais da Academia Brasileira de Ciências 06/2013; 85(2). DOI:10.1590/S0001-37652013005000035 · 0.88 Impact Factor
  • Source
    Silvana P Q Scalon, Leandro H S Mota, Rosilda M Mussury
    [Show abstract] [Hide abstract]
    ABSTRACT: The present work aimed to evaluate the osmotic conditioning and shading on the germination and on the initial growth of aroeira seedlings. The seeds were pre-imbibed in solutions with different concentrations of PEG (polyethylene glycol) and KNO3 and incubated at 10°C and 20°C temperatures, during 0 (control), 12 and 24 hours. After these periods, the seeds were dried until they reached the initial levels of humidity. After that, they were put for germinating in BOD (Biochemical Oxygen Demand) chambers, at alternated 20-30°C. The control treatment and the pre-conditionings that presented the best results in BOD germination were selected, PEG (-1.0 MPa) + KNO3 (-1.0 MPa) and KNO3 (-1.0 MPa), with pre-imbibition for 12 h and incubated in BOD at 20°C. The seeds were sowed on trays and then they were transplanted, keeping under a net covered with 50% and 70% of shading and at sunlight. The osmotic conditioning did not change the seeds germination in BOD, but the highest aerial part size was observed in PEG -1.0 MPa + KNO3-1.0 MPa treatment. The shading levels at 50% and 70% and the osmotic conditioning with PEG -1.0 MPa + KNO3-1.0 MPa offered a higher emergence in a greenhouse condition; however, at sunlight the seeds presented a better index of quality on the 145th day.
    Anais da Academia Brasileira de Ciências 06/2013; 85(2). DOI:10.1590/S0001-37652013005000031 · 0.88 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to verify the phytotoxic effect of the crude ethanol extract and semipurified fractions from the stem and leaves of Croton doctoris on the germination, growth and cell division of roots cells of lettuce (Lactuca sativa) and onion (Allium cepa), in the laboratory. The bioassays was conducted in using completely randomized design, with four concentrations (0, 250, 500, 1.000mg L-1) and four replications. The crude extract and the fractions from the stem and leaves inhibited germination and seedling growth of lettuce and onion, with greater phytotoxic effect observed in the ethyl acetate fraction (EAF) from the stems and leaves that significantly affected the growth and mitotic index of root cells of lettuce and onions. With these results it appears that C. doctoris contains substances capable of influencing the germination, growth and cell division of the species studied.
    Ciência Rural 04/2013; 43(4):645-652. DOI:10.1590/S0103-84782013000400013 · 0.40 Impact Factor
  • Source
    Silvana de Paula Quintão Scalon, Ayd Mary Oshiro, Tathiana Elisa Masetto, Daiane Mugnol Dresch
    [Show abstract] [Hide abstract]
    ABSTRACT: This article aims at evaluating the effects of different packaging and varied storage temperatures on the germination potential of seeds of Campomanesia adamantium Camb. O. Berg. The seeds were packaged in glass, aluminum foil and plastic containers, or maintained inside intact fruits at 5, 10 and 15 ºC during 0, 7, 14 and 21 days. After these periods the seeds were sown in Germitest® germination paper and maintained in incubation chambers at 25 ºC under constant white light for 42 days. Seed moisture contents were evaluated both before and after storage, as well as germination percentages, germination speed index, root and aerial portion of seedlings lengths, and total dry weights. All possible combinations of packing materials, temperatures and storage times were tested, with four repetitions of 25 seeds for each treatment. C. adamantium seeds showed initial water contents of 31.5%. Glass and aluminum packaging were efficient at maintaining the water content of the seeds, and provided greater germination speed index than the other packaging materials. Germination percentages, seedlings lengths and dry weights did not vary among the different temperatures tested. C. adamantium seeds can be stored for up to 21 days at temperatures between 5 and 15 ºC without altering their physiological quality. In terms of cost-benefit efficiencies, these seeds can be stored without significant damage for 21 days while still inside the fruits at temperatures of 5, 10 or 15 ºC.
    Revista Brasileira de Fruticultura 03/2013; 35(1):262-269. DOI:10.1590/S0100-29452013000100030 · 0.49 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The objective of this study was to investigate the influence of the level of minimal processing and modified atmosphere on the quality of 'Champagne' orange stored under refrigeration. The fruits were subjected to the following processing: a) whole fruit without flavedo; b) whole fruit without flavedo and albedo; and c) segmented into wedges and packed as follows: uncoated packaging (control); polyethylene film; PVC film; gelatin-based edible films (3%); and polyesthyrene translucent plastic container with a lid. The minimally processed oranges were stored at 5 ± 1°C for 8 days and were subjected to physicochemical and microbiological analyses every two days. Greater weight loss occurred in fruits without flavedo and segmented, uncoated, and coated with the edible gelatin film During storage, there was a slight increase in Total Soluble Solids (TSS) for the treatments with greater weight loss and reduction in acidity and ascorbic acid, regardless of the packaging type. The microbial counts did not exceed the acceptable limits in the treatments; however, higher counts were observed at the end of storage. The minimally processed fruit packed in lidded polystyrene containers and polyethylene and PVC films kept their overall fresh visual appearance with a few physicochemical and microbiological changes up to the 8th day of storage.
    Ciência e Tecnologia de Alimentos 03/2013; 33(1):84-92. DOI:10.1590/S0101-20612013005000018 · 0.41 Impact Factor