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

2010 ◽  
Vol 32 (3) ◽  
pp. 141-151 ◽  
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.

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

2019 ◽  
Vol 32 (3) ◽  
pp. 834-840
Author(s):  
WILLEN RAMOS SANTIAGO ◽  
JULIANA SIMÕES NOBRE GAMA ◽  
SALVADOR BARROS TORRES ◽  
MOADIR DE SOUSA LEITE ◽  
TIAGO DE SOUSA LEITE ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Wild Species ◽  
Seedling Emergence ◽  
Potassium Nitrate ◽  
Independent Experiment ◽  
Physiological Performance ◽  
Germination Speed ◽  
Physiological Quality ◽  
Physalis Angulata

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.

scholarly journals Germination and vigour of primed asparagus seeds

2005 ◽  
Vol 62 (4) ◽  
pp. 319-324 ◽  
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.

scholarly journals Maturation fruits and drying on quality of crambe seeds

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.

scholarly journals Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds

2019 ◽  
Vol 10 (4) ◽  
pp. 461-466
Author(s):  
Patrícia Marluci Da Conceição ◽  
Fernando Alves De Azevedo ◽  
Gerhard Vitor Ecker ◽  
Marilia Morelli ◽  
Mariangela Cristofani-Yaly
Keyword(s):  
Storage Time ◽  
Germination Rate ◽  
Poncirus Trifoliata ◽  
Citrus Fruits ◽  
Rangpur Lime ◽  
Brazilian Legislation ◽  
Physiological Quality ◽  
Citrus Seeds ◽  
Fruit Mass

Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.

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

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.

scholarly journals Fruit processing and the physiological quality of Euterpe edulis Martius seeds

2014 ◽  
Vol 36 (2) ◽  
pp. 134-142 ◽  
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.

scholarly journals Maturation and physiological quality of IAC-863 Rangpur lime seeds

2019 ◽  
Vol 10 (4) ◽  
pp. 454-460
Author(s):  
Marília Morelli ◽  
Fernando Alves de Azevedo ◽  
Patrícia Marluci da Conceição ◽  
Ana Julia Borim de Souza
Keyword(s):  
Germination Rate ◽  
Physicochemical Analysis ◽  
Soluble Solids ◽  
Rangpur Lime ◽  
Physicochemical Changes ◽  
Physiological Quality ◽  
Solids Content ◽  
Citrus Seeds ◽  
The Ideal

There is a growing demand for high quality seeds to obtain citrus rootstocks. Normative Instruction 48 (MAPA) of September 24, 2013, requires minimum of 50% germination for the marketing of citrus seeds. Harvest season is one of the stages of seed production with great importance to ensure quality, which makes knowing its maturation process an important step. Thus, the objective of this study was to monitor physicochemical changes in IAC-863 Rangpur lime fruits in order to characterize the physiological maturity of seeds, and to define the ideal harvest point in order to obtain seeds with high physiological quality to obtain rootstocks. Physicochemical analysis of fruits (mass loss, color, soluble solids and acidity) and analysis of seeds (water content, germination and emergence) was performed. Higher germination results were observed in seeds obtained from fruits with higher color index and soluble solids content. The storage of IAC-863 Rangpur lime fruits after harvest increases germination rate, especially in mid-season fruits.

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

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.

scholarly journals Genetic diversity for physiological quality of seeds from corn (Zea mays L.) intervarietal crossbreeds

2013 ◽  
Vol 35 (4) ◽  
pp. 449-456 ◽  
Author(s):  
Daniele Nerling ◽  
Cileide Maria Medeiros Coelho ◽  
Rubens Onofre Nodari
Keyword(s):  
Genetic Diversity ◽  
Zea Mays L ◽  
Accelerated Aging ◽  
Genetic Contribution ◽  
Percentage Germination ◽  
Canonical Variables ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Physiological Quality

The physiological quality is based on the genotype and may be accompanied since the first stages of selection through the study of genetic diversity. The purpose of this study was to evaluate the parental genetic contribution in the seed physiological quality in corn intervarietal crossbreeds. The intervarietal crossbreeds were performed using landraces genotypes, open pollinated varieties and commercial hybrids. The seeds obtained from the crossbreed, their equivalents and parentals were evaluated regarding their water percentage, germination, germination speed rate, accelerated aging, field emergence and electrical conductivity. The seeds obtained in the crossbreed are viable and vivid with heterosis when compared with the parentals. The accelerated aging test was more effective for selecting the strongest genotypes. The canonical variables were useful to group the genotypes that presented similar physiological characteristics. The genotypes MPA 01 x Pixurum 05, MPA 01 x AS1565, MPA 01 x SJC5886, SJC5886 x Pixurum 05 and Fundacep 35 x SCS 154 Fortuna were the best crossbreeds regarding the production of better physiological quality seeds.

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

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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