[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.
[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.
[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. · 0.33 Impact Factor
[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). · 0.85 Impact Factor
[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). · 0.85 Impact Factor
[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%.
[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.
[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. · 0.30 Impact Factor
[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. · 0.33 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The objective of this study was to evaluate the substrate and water availability on germinative pontential of Uvaia (Eugenia pyriformis) seeds. The substrates evaluated were the following: Sand (S), Latosol + sand (L + S) (1:1), Latosol + sand + semi-decomposed chicken litter (L + S1+ CL ) (1:1:0.5), Latosol + sand + semi-decomposed chicken litter (L + S2 + CL) (1:2:0.5), Latosol + Bioplant® + (L + B) (1:1) joined to the following water levels: 25, 50, 75 and 100% the ability to retain water. The highest percentage of emergence and the best seedling growth were observed in substrates Latosol + sand + chicken litter (1:2:0.5) and water retention capacity of 50%.
Revista Árvore 02/2013; 37(1):49-58. · 0.33 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Caranda is a Brazilian native palm tree, belonging to Arecaceae family and occurring, predominan,t in the Brazilian Swampland. This work studied the germination and the caranda seeds storage behavior. The germination study was carried out in the temperatures of 25ºC and 30ºC in constant white light and the alternate temperature of 20/30ºC with 10 hours of darkness for the lowest temperature and 14 hours of light for the highest temperature, using paper and paper roll as substratum. At the end of test, the germination percentage, germination speed index, germination medium time and the primary root length were evaluated. After the seeds improvement, it was obtained two sub-samples destined for 30 days storage in two invironments: cold and dry chamber (16ºC/55% UR) and freezer (-18ºC). The following tests, water content, germination, germination medium time and primary root length were evaluated. The caranda seeds germination in paper roll and on paper is favored by the temperature of 20/30ºC in paper roll and on paper and paper roll on 30ºC. The freezing and cold camera storage during 30 days are efficient to reduce the germination medium time of caranda seeds and to keep the germination percentage.
[Show abstract][Hide abstract] ABSTRACT: Due to the devastation of the Cerrado areas, many native species are threatened with extinction, and due to the widespread use of Anadenanthera falcata, studies on the ecophysiology of seed germination and seedling growth are necessary. This study aimed to evaluate the priming and shading effects on the germination and early growth of angico seedlings. The seeds were pre-soaked in solutions with different concentrations of PEG and KNO3 and incubated at 10°C and 20°C for 12 and 24 hours. After these periods the seeds were dried until reaching the initial moisture levels, and subsequently incubated in BOD at the temperature of 20-30°C under photoperiods of 8h of light and 16h of dark. The control treatment and pre-conditioning with KNO3 (-1.0 MPa) and PEG (-1.0 MPa) presented the best germination results in BOD. The seeds were sown in trays and then transplanted to plastic packages, remaining in a greenhouse covered with 50% and 70% shading, in full sun. In BOD, the priming treatments decreased the germination of seeds. Under shade, the doses evaluated did not affect the emergence of angico, however, seeds treated with KNO3 (-1.0 MPa) had a greater EVI, in full sun and showed a better development when maintained up to 145 days of age.
Revista Brasileira de Plantas Medicinais 12/2012; 15(4):655-663.
[Show abstract][Hide abstract] ABSTRACT: Aroeira has great economic importance due to its wood useful, tannins extraction and use in the pharmacology. The aim of this work was to evaluate the germination aspects and initial seedlings development of aroeira, under gibberellins, substrata and shading effects, and for that two experiments were led out. In the first one, seeds were previously soaked for 24 hours in water and in 100 mg.L-1 gibberellin solution and were sowed directly in cells trays in the following substrata: land and sand (1:1 and 1:2) and Plantmax®. In the second experiment, 15 cm length seedlings were transplanted to polyethylene sacks filled out land+sand+poultry manure (1:1:1) partly decomposed and they were maintained at greenhouse for 15 days. Soon after, seedlings were transferred for the following conditions: shading (50%) and full sun and they were 50 mg.L-1 and 150 mg.L-1 gibberellins solutions pulverized, as control seedlings water pulverized. Aroeira seeds should not be previously water or gibberellins imbibed before being sowed. The best substrata for aroeira seeds germination was Plantmax® without germinative treatments to reach higher than 80% of seedlings survival. The seedlings developed better at full sun light and the gibberellin. It was observed increment in height, diameter, foliar area and fresh and dry mass from aerial and root part when compared to shading situation. The gibberellins applications did not influence the aroeira seedlings initial growth characteristics.
[Show abstract][Hide abstract] ABSTRACT: The objective of this study was to evaluate the post-harvest conservation of guavira (Campomanesia adamantium Camb.) in different coatings and temperatures. The fruit received the following treatments: immersion in 1) 1% carboxy methylcellulose (w /v) (CMC) 2) 3% pectin, 3) pectin + 3% calcium chloride (w / v) and 4) no treatment (ST) all packaged in low density polyethylene (LDPE) and stored for 0, 7, 14 and 21 days in B.O.D. at temperatures of 5, 10 and 15 °C. The lowest weight loss and titratable acidity were observed at 5°C and the coated with pectin + calcium. The pH did not vary between the coatings and kept higher than 5 °C. The vitamin C content was higher under the influence of the coating of pectin + calcium with initial values similar to the 5 and 10 ºC. It was concluded that the guaviras can be stored for up to 21 days at 5 °C, coated with pectin + 3% calcium.
Revista Brasileira de Fruticultura 12/2012; 34(4):1022-1029. · 0.30 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The objective of this study was to evaluate the effect of combined levels of N and P in nutrient content and nutritional efficiency in seedlings of canafístula (Peltophorum dubium Spreng. Taub.) on Oxisol. The experiment was carried out in pots of 4 dm3, with treatments arranged in 4x4 factorial scheme, 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. The highest levels of N and P showed higher accumulation of nutrients in both the shoot and root while for the micronutrients that effect was caused only by P. The species showed high nutritional requirement for N, P used more efficiently and supply of nutrients is greater for shoot seedling.
Revista Árvore 10/2012; 36(5):803-812. · 0.33 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This work aimed to verify the effects of biostimulant doses, applied through seeds, on faveiro (Dimorphandra mollis Benth.) seeds and seedlings vigor. Seeds were previously sulfuric acid scarified in two consecutive years experiments. On 2006 August (first experiment) seeds were submitted on Stimulate®: 0; 3.5; 7.0; 10.5 and 14 mL.0.5 Kg-1 doses (first experiment); and seeds picked in August, 2007, were Stimulate:0; 15; 20 and 25 mL.0.5Kg-1 of seeds treated (second experiment). After the biostimulant treatment seeds were sowed in cells trays containing 1:1 (v:v) distroferric red latosol + plantmax®. The effect of different Stimulate® doses on Dimorphandra mollis seeds collected in different years were evaluated on the emergency percentage, speed emergency index, root length, aerial part height and dry seedling weight. It was conducted on entirely casualized with four repetitions of 25 seeds each treatment. The 14 mL (2006 lot) and 15 mL (2007 lot) 0.5Kg-1 of seeds doses provided larger percentage (50% and 66%, respectively) and speed emergency indexes (0.67 and 0.9 respectively). The 20 mL.0.5Kg-1 of seeds dose treatment favored the aerial part length, but it didn't influenced the other Dimorphandra mollis seedlings vigor indexes.
[Show abstract][Hide abstract] ABSTRACT: The purpose of this work was to determine the effects of different coatings and storage temperatures in the post-harvest preservation of "Pedro Sato" guavas. The fruits were immerse in chitosan solution (1% and 3%) (w/v), gelatin (3%) (w/v), PVC film 17µm and those that did not receive any coating functioned as control and stored at 5°C and 10°C, both with UR 80 ± 5%, and the evaluations were performed at days 0, 7, 14, 21, and 28 after storage. For each storage temperature, the experimental outline applyed was entirely randomized in factorial squeme with four repetitions. The edible coatings (gelatin and chitosan) were not eficient in slowing down the maturation and in extending the preservation and quality of the guava at 5°C and 10°C. The use of PVC film reduced mass loss and contributed to the maintenance of "Pedro Sato" guava’s vitamin C and total sugar levels for 28 days stored in both evaluated temperatures.
Revista de Ciencias Agrarias 06/2012; 35(1):213-221.
[Show abstract][Hide abstract] ABSTRACT: This study aimed to evaluate the desiccation sensivity and storage and longevity behavior of uvaia seeds (Eugenia pyriformis Camb.). It was carried out with seeds from fruits collected at Amambai-MS city. To study the desiccation sensitivity, a protocol based on the dehydration level on each five percentage points reaching 45, 40, 30, 25, 20, 15, 10 and 5% seeds moisture contents was used. To study the longevity of seeds during storage were tested the following conditions of cold and dry chamber (16 ± 1C º / 40% UR), refrigerator (5 ± 1C º) and freezer (-18 ± 1 º C) for 30 days and seeds sown soon after processing constituted the control treatment. Seeds were sowed between sand at 20/30 ºC at 10 h light/14 h darkness in B.O.D. Uvaia seeds are desiccation sensitivity and can not tolerate drying below 5% moisture content. The moisture content decrease caused the reduction on the fresh mass, primary root length, hypocotyls length and on the seedlings total length reduction as in the germination medium time. The fresh seeds presented approximately 77% germination and the 5% moisture content dehydration reduced the germination to 15%. The storage conditions under low temperatures and seeds dehydration reduced seed germination, thus indicating a recalcitrant behavior of uvaia seeds.
Revista Brasileira de Fruticultura 03/2012; 34(1):269-276. · 0.30 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The present work evaluated the germinability and vigor of Croton urucurana seeds. 1) Seeds were sorted by color (caramel, gray and black) and were subjected to seven different pre-germination treatments followed by incubation at 20ºC, 25°C or 20/30°C. 2) Seeds were stored in cold chambers or at room temperature for up to 300 days and were subsequently incubated at 20/30ºC in a germination chamber or under greenhouse conditions. Only gray seeds showed significant germination rates. The highest first count percentages of total germination and the highest germination speed indices were observed in control seeds and in those which were treated with water or 200 mg.L(-1) gibberellic acid for 12 hours. Seeds stored under refrigeration showed the highest values for all of the characteristics examined, as well as less electrical conductivity of the imbibing solution. Seedlings were more vigorous when seeds were stored for 300 days in a cold chamber. The seedlings production can be increased by incubating the seeds at alternating temperatures (20/30°C). The seeds do not need pre-germination treatments.
Anais da Academia Brasileira de Ciências 03/2012; 84(1):191-200. · 0.85 Impact Factor