PHYSIOLOGICAL PERFORMANCE OF Physalis angulata L. SEEDS TREATED WITH CHEMICAL PROMOTERS

ABSTRACT Physalis angulata L. (Solanaceae), popularly known as ‘camapu’, has high pharmacological and agroindustrial potential. However, because it essentially is a wild species, studies on the physiological quality of its seeds are still scarce. In this sense, the objective was to evaluate the physiological performance of P. angulata seeds as a function of pre-germination treatments with chemical promoters. For this, germination, first germination count, germination speed index and seedling emergence tests were performed. The substrate was previously moistened with solutions of gibberellic acid - GA3 (0.00, 0.02, 0.04, 0.06 and 0.08%), potassium nitrate - KNO3 (0.0, 0.2, 0.4, 0.6, 0.8 and 1.0%) and Stimulate® (0.00, 0.25, 0.50, 0.75, 1.00, 1.25 and 1.50%). Each chemical promoter constituted an independent experiment, in a completely randomised design, with four replicates of 25 seeds each. The three chemical promoters enhanced the physiological performance of P. angulata seeds, and the concentrations of 0.05% GA3, 0.4% KNO3 and 1.0% Stimulate® were most suitable.

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Osmotic priming methodologies in relation to the physiological performance of rangpur lime seeds (Citrus limonia Osbeck)

Revista Brasileira de Sementes ◽

10.1590/s0101-31222010000300016 ◽

2010 ◽

Vol 32 (3) ◽

pp. 141-151 ◽

Cited By ~ 5

Author(s):

Ísis Barreto Dantas ◽

Renato Mendes Guimarães ◽

Édila Vilela de Rezende Von Pinho ◽

Maria Laene Moreira de Carvalho

Keyword(s):

Seedling Emergence ◽

Potassium Nitrate ◽

Percentage Germination ◽

Promising Technique ◽

Peg 6000 ◽

Physiological Performance ◽

Rangpur Lime ◽

Physiological Quality ◽

Citrus Seeds

Several mechanisms have been used to promote rapid germination of citrus seeds and uniform seedling emergence. We evaluated the effects of osmotic priming on the physiological performance of Rangpur lime seeds (Citrus limonia Osbeck). Seeds were treated with 30 g of Captan and 10 g of Tecto 600 in 20-litre batches and stored, without drying, at 10 ºC and 50% relative humidity for periods of 3, 6 and 9 months. After each period, seeds were primed at 25 ºC, in the light, by immersion in Poliethylenoglicol (PEG 6000), potassium nitrate (KNO3) and 70% PEG 6000 plus 30% KNO3, all at an osmotic potential of -1.1MPa, for priming periods of 3, 6, 9 and 12 days. Percentage germination, tray emergence and the emergence rate index (ERI) were evaluated. Priming in PEG 6000 solution, independent of priming period, or in KNO3 or PEG 6000 plus KNO3 for up to 9 days, were efficient at improving the physiological performance of seeds stored for up to 3 months. Osmotic priming appears to be a promising technique for improving the physiological quality of Rangpur lemon seeds.

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Germination and vigour of primed asparagus seeds

Scientia Agricola ◽

10.1590/s0103-90162005000400003 ◽

2005 ◽

Vol 62 (4) ◽

pp. 319-324 ◽

Cited By ~ 10

Author(s):

Mário Lúcio de Carvalho Bittencourt ◽

Denise Cunha Fernandes dos Santos Dias ◽

Luiz Antônio dos Santos Dias ◽

Eduardo Fontes Araújo

Keyword(s):

Sea Water ◽

Seedling Emergence ◽

Germination Percentage ◽

Peg 6000 ◽

Beneficial Effects ◽

Germination Speed ◽

Speed Up ◽

Physiological Quality ◽

Controlled Deterioration

The osmotic conditioning or priming is considered a promising technique to speed up germination and to improve seed performance. Four seed lots of asparagus, Mary Washington cultivar, were primed at 25°C for seven or 14 days using PEG 6000 at -1.0 or -1.2 MPa, or sea water at -3.3 MPa; or for three days in distilled water. The physiological quality of the seeds was evaluated by standard germination, first count germination, speed of seedling emergence, and germination percentage and seedling fresh and dry weights after controlled deterioration test. Primed seeds presented higher germination speed, independently of their initial physiological quality. Beneficial effects of priming on germination and vigour were more expressive in the seed lot of low physiological quality. Priming in PEG 6000 at -1.0 MPa for 14 days was the most beneficial treatment to improve asparagus seeds performance.

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Maturation fruits and drying on quality of crambe seeds

Journal of Seed Science ◽

10.1590/2317-1545v43235272 ◽

2021 ◽

Vol 43 ◽

Author(s):

Hugo Tiago Ribeiro Amaro ◽

Eduardo Fontes Araujo ◽

Roberto Fontes Araujo ◽

Luiz Antônio dos Santos Dias ◽

Fabrício Welington Souza Silva ◽

...

Keyword(s):

Experimental Design ◽

Oil Content ◽

Seedling Emergence ◽

Physiological Performance ◽

Crambe Seed ◽

Different Temperatures ◽

Physiological Quality ◽

Brown Color

Abstract: This study aimed to evaluate the effect of maturation fruit and drying temperatures stages on oil content and the physiological performance of crambe seeds. Randomized blocks were the experimental design, with four replications. Harvests occurred when the plants reached 20, 40, 60, 80 and 100% brown color fruits. After harvest, seeds were dried at different temperatures (natural and artificial air at 30, 45 and 60 °C). The seeds were evaluated for the weight of a thousand seeds, productivity, oil content, germination and vigor (count of the first germination and seedling emergence). Crambe seeds, FMS Brilhante cultivar, reach the maximum oil content with harvests made from 70% of total brown color fruits. Drying temperatures do not affect the oil content of the seeds. Harvesting crambe seed aiming at the highest physiological quality should occur when the plants have between 75 and 85% brown fruits. Artificial drying at 30 and 45 °C can be recommended for crambe seeds, favoring the production of quality seeds.

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Influence of physiological and health quality on the vigor of cucumber seeds

Arquivos do Instituto Biológico ◽

10.1590/1808-1657001262018 ◽

2019 ◽

Vol 86 ◽

Author(s):

Vanessa Nogueira Soares ◽

Francisco Amaral Villela ◽

Aline Klug Radke ◽

Hélen Claudine Saliba Rodrigues ◽

Vanessa Pinto Gonçalves ◽

...

Keyword(s):

Electrical Conductivity ◽

Seedling Emergence ◽

Seed Vigor ◽

Physiological Performance ◽

Penicillium Sp ◽

Cucumber Seed ◽

Health Quality ◽

Physiological Quality ◽

Controlled Deterioration

ABSTRACT The physiological performance of seeds is related to their physiological quality and seed vigor, while their health quality may interfere with germination and early seedling establishment in the field due to the interaction of microorganisms associated with seeds. The study aimed to evaluate the physiological performance and health quality of cucumber seeds and to verify the relationship between these attributes. The physiological quality of cucumber seeds was evaluated by standard germination tests, first count of germination, controlled deterioration test, electrical conductivity test, seedling emergence, emergence speed index, and traditional accelerated aging and aging modified with saline for 48, 72, and 96 h. The health quality of cucumber seed lots was evaluated by blotter test. Stratification of cucumber seed lots by seedling emergence was similar to seedling emergence by controlled deterioration test, first count of germination, and electrical conductivity results. The cucumber seed lots evaluated showed high germination rates; however, lots 1 and 3 had a better performance in vigor tests than lots 2 and 4. Fungi detected in the blotter test were Alternaria sp., Aspergillus sp., Cladosporium sp., and Penicillium sp. Seed lots 2 and 4 had low vigor evaluated by seedling emergence and controlled deterioration, and showed a higher incidence of Penicillium sp. in the evaluation of health quality of seeds. The incidence of Penicillium sp. may negatively affect the vigor of cucumber seeds evaluated by seedling emergence and by controlled deterioration test.

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Germination of Echium plantagineum L. seeds submitted to dormancy overcoming and variations in temperature, light and depth of sowing

Journal of Seed Science ◽

10.1590/2317-1545v39n3174115 ◽

2017 ◽

Vol 39 (3) ◽

pp. 262-271 ◽

Cited By ~ 3

Author(s):

Rodrigo Roso ◽

Ubirajara Russi Nunes ◽

Juçara Terezinha Paranhos ◽

Caren Alessandra Müller ◽

Tiéle Stuker Fernandes ◽

...

Keyword(s):

Gibberellic Acid ◽

Factorial Design ◽

Accelerated Aging ◽

Soil Surface ◽

Potassium Nitrate ◽

Germination Percentage ◽

Sowing Depth ◽

Randomized Design ◽

Physiological Quality

Abstract: The objective of this study was to evaluate methods of overcoming dormancy, light regimens, temperature and depth of sowing variations in the physiological quality of Echium plantagineum seeds. The diaspores (agglutinated fruits from the seeds) were submitted to treatments using accelerated aging, potassium nitrate and gibberellic acid to overcome dormancy. A 7 x 2 factorial design was used to evaluate the temperatures (5, 10, 15, 20, 25, 30 and 35 °C) and light regimens (presence or absence of light). A 6 x 2 factorial design was used for sowing depth (0, 1, 2, 3, 4 and 5 cm) and soil coverage (presence or absence of straw). In all experiments, a completely randomized design with four replicates of 50 diaspores was used. The main evaluations were germination, first germination count, germination speed index and emergence. The seeds showed dormancy, which was overcome by the immersion of the diaspores in potassium nitrate and gibberellic acid. The ideal temperature for germination was 20 °C, showing greater germination in the presence of light, considered as preferentially positively photoblastic. The highest germination percentage occurred when the diaspores were positioned on the soil surface in the presence of straw.

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Fruit processing and the physiological quality of Euterpe edulis Martius seeds

Journal of Seed Science ◽

10.1590/2317-1545v32n2847 ◽

2014 ◽

Vol 36 (2) ◽

pp. 134-142 ◽

Cited By ~ 5

Author(s):

Patrícia Ribeiro Cursi ◽

Silvio Moure Cicero

Keyword(s):

Water Content ◽

Seedling Emergence ◽

Physiological Performance ◽

Euterpe Edulis ◽

Fruit Processing ◽

Physiological Quality ◽

Euterpe Edulis Martius ◽

Water Contents ◽

Do So

Different pulping methods were analyzed for Euterpe edulis, with regard to its seed physiological quality, and the physiological performance of seeds submitted to continuous drying and monitored by radiographs was assessed. In order to do so, 2x2 factorial design treatments were carried out, using two different manners to store fruit prior to pulping, immersed in water and not. Also, two different methods for the pulping of fruit were used for each lot; namely, manual and mechanical. Seeds from fruit that had been immersed in water at 40 ºC for 20 minutes showed greater physiological performance than those that had not been immersed in water previously. Immersion in water at 55 ºC resulted in seed death. The pulp extraction method, whether manual or mechanical, did not affect seed physiological performance. Radiographs made it possible to observe that the volume occupied by embryos in the embryo cavity reduced with decreased water content. Mechanical pulping showed no reduction in percentage of seedling emergence for water content up to 33.3%. However, reduction in water content to 16.1% caused seed death. The drying of manually pulped seeds until reaching 39.0% water content did not adversely affect seedling emergence, whereas lower water contents than 25.6% caused seed death.

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Physiological quality of Urochloa brizantha seeds submitted to priming with calcium salts

Pesquisa Agropecuária Tropical ◽

10.1590/1983-40632019v4955341 ◽

2019 ◽

Vol 49 ◽

Author(s):

Elizena Cristina Gomes Ribeiro ◽

Rodrigo de Góes Esperon Reis ◽

Cesar Crispim Vilar ◽

Flavia Carolina Moreira Vilar

Keyword(s):

Calcium Sulfate ◽

Seedling Emergence ◽

Nitrate Solution ◽

Calcium Nitrate ◽

Dry Weight ◽

Potassium Nitrate ◽

Calcium Salts ◽

Physiological Quality ◽

Urochloa Brizantha

ABSTRACT Seed priming provides a variety of benefits, including seed invigoration and reduced dormancy. Urochloa brizantha seeds are typically primed with difficult-to-acquire potassium nitrate (KNO3). In this sense, calcium salts stand out as an alternative, but it is important to determine whether they provide the same benefits as potassium nitrate. This study aimed to evaluate the physiological quality of U. brizantha seeds after priming with calcium salts, and compare the results to those obtained with potassium nitrate. Seeds were submitted to priming with calcium nitrate [Ca(NO3)2] and calcium sulphate (CaSO4) at -0.55 MPa and -1.10 MPa, for 12 h and 24 h, and potassium nitrate (KNO3) at -1.10 MPa for 12 h, as well as to no priming (control). A completely randomized design, with ten treatments and four repetitions, was used. Priming promoted a higher germination percentage and lower seed dormancy, with a greater seedling emergence in a shorter time period. CaSO4 did not differ from KNO3 in shoot dry weight of seedlings, but reduced the electrical conductivity of seeds. Calcium nitrate and calcium sulfate show a promising potential for use in the osmotic priming of Urochloa brizantha (BRS Piatã cultivar) seeds, since they are as efficient as potassium nitrate, as well as less costly and easier to purchase. Calcium sulfate priming at -0.55 MPa for 12 h, at 25 ºC, is recommended to replace the potassium nitrate solution.

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Application of Trichoderma harzianum on the physiological quality of cowpea seeds

Australian Journal of Crop Science ◽

10.21475/ajcs.21.15.05.p2865 ◽

2021 ◽

pp. 643-648

Author(s):

Marcelo Laranjeira Pimentel ◽

Henara Valéria Miranda Castro ◽

Mike Kirixi Munduruku ◽

Larissa Conceição Cunha Ponte ◽

Deyvielen Maria Ramos Alves ◽

...

Keyword(s):

Trichoderma Harzianum ◽

Seed Treatment ◽

Germination Percentage ◽

Hypocotyl Length ◽

Cowpea Seeds ◽

Randomized Design ◽

Germination Speed ◽

Physiological Quality ◽

Set Up

The use of fungi in seed treatment can improve the plant's physiological characteristics. The aim of this study was to evaluate the influence of the use of Trichoderma harzianum on the physiological quality of bean seeds. The experiment was set up and conducted in the forest seed laboratory of the Federal University of Western Para, in a randomized design, using 4 procedures on the basis of a colony forming unit (CFU): T1 (0 CFU), T2 (4 x 109 CFU), T3 (8 x 109 CFU) and T4 (12 x 109 CFU), with 5 repetitions. Germination percentage (G%), germination speed index (GSI), hypocotyl length (HL) and radicle length (RL) were evaluated as variables. The data were analyzed by variance analysis and the averages were compared using the Tukey test (p≤0.05), in addition to the regression analysis, using the Minitab© version 18 statistical software. There were differences between the germination percentage tests, in which T2 obtained 100% of germinated seeds, for GSI it was observed that T2 and T3 were equal and superior to the other treatments, while for RL T1 and T2 obtained the best results, however, for HL there were no statistical differences between treatments. T2 was more efficient in the physiological quality of seeds to germination percentage and germination speed index

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Effect of seed vigor and sowing densities on the yield and physiological potential of wheat seeds

Journal of Seed Science ◽

10.1590/2317-1545v43241586 ◽

2021 ◽

Vol 43 ◽

Author(s):

Carolina Pereira Cardoso ◽

José Henrique Bizzarri Bazzo ◽

Jéssica de Lucena Marinho ◽

Claudemir Zucareli

Keyword(s):

Seed Yield ◽

Seedling Emergence ◽

Accelerated Aging ◽

Seed Vigor ◽

Wheat Crop ◽

Seedling Length ◽

Physiological Quality ◽

Initial Seed ◽

Wheat Seeds

Abstract: Initial seed vigor and sowing density interact in establishment of plants in the field, and can thus affect expression of the plasticity of the wheat crop and the yield and physiological quality of the seeds produced. The aim of this study was to evaluate the effect of seed vigor levels in combination with sowing densities on the yield and physiological potential of wheat seeds. The cultivars BRS Gralha-Azul and BRS Sabiá were used in a randomized block experimental design in a 2 × 4 factorial arrangement, with four replications. The treatments consisted of seeds of high and low vigor and four sowing densities (150, 250, 350, and 450 seeds.m-2). The following evaluations were made: seed yield, germination, first germination count, seedling length, seedling dry matter, accelerated aging, emergence speed index, and seedling emergence in sand. An increase in sowing density favors the seed yield of both cultivars; however, it reduces the vigor of the seeds produced by the cultivar BRS Gralha-Azul, especially of the seeds produced by plants originating from high vigor seeds. For the cultivar BRS Sabiá, an increase in sowing density decreases the germination performance of seeds produced by plants originating from low vigor seeds.

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Physiological quality of dynamically cooled and stored soybean seeds

Journal of Seed Science ◽

10.1590/s2317-15372013000300012 ◽

2013 ◽

Vol 35 (3) ◽

pp. 353-360 ◽

Cited By ~ 16

Author(s):

Jacson Zuchi ◽

José de Barros França-Neto ◽

Carlos Sigueyuki Sediyama ◽

Adílio Flauzino de Lacerda Filho ◽

Múcio Silva Reis

Keyword(s):

Dynamic Process ◽

Seed Quality ◽

Seedling Emergence ◽

Accelerated Aging ◽

Superior Performance ◽

Soybean Seeds ◽

Tropical Regions ◽

Physiological Quality ◽

Feasible Alternative

Storage is an important step in the production of soybean seeds, mainly in tropical regions, where high temperatures can drastically reduce seed quality. The storage at cooler temperatures may be a feasible alternative to preserve seed quality during storage. The objective of this study was to evaluate the physiological quality of soybean seeds artificially cooled by a dynamic process and stored in an environment, with non controlled temperature and relativity humidity. Two seed lots of cultivars Monsoy 8757, TMG 115 RR and BRS Valiosa RR were used. After processing and during packaging the seeds were cooled to 18 ºC by a dynamic process. Seed samples were collected after 0, 60 and 120 days of storage, using the following parameters germination, accelerated aging, seedling emergence in sand, speed of emergence index, electrical conductivity, tetrazolium and seed health. Although soybean seeds artificially cooled by the dynamic method may have slightly superior performance in maintaining physiological quality during storage in non-refrigerated warehouse, for lots of high physiological quality, these advantages are not observed.

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