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 Physiological quality of osmoprimed gherkin seeds

2013 ◽  
Vol 35 (3) ◽  
pp. 368-373 ◽  
Author(s):  
Rodrigo de Góes Esperon Reis ◽  
Humberto Pereira da Silva ◽  
José Maria Gomes Neves ◽  
Renato Mendes Guimarães
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Germination Percentage ◽  
Initial Profile ◽  
Randomized Design ◽  
Physiological Quality ◽  
Osmotic Potentials

It was aimed to verify the effect of different methodologies of osmopriming on physiological quality of gherkin seeds. Prior, it has been characterized the initial profile of the gherkin seeds. Then, the seeds were osmoprimed in gerboxes containing two blotter papers wetted with osmotic solutions in a volume equal to three times the paper dry weight and kept in BOD at 15 °C. After the priming, the seeds were dried at room temperature for 48 hours. Then, the following variables were evaluated: seeds moisture content, percentage of germination, percentage of emergence, emergence speed index and electrical conductivity. The analyses of variances were realized according to a randomized design in a factorial scheme 3 x 2 x 4: three solutes (polyetilene glycol 6000 - PEG, potassium nitrate - KNO3 and PEG + KNO3), two osmotic potentials (-0.55 and -1.10 MPa) and four times of priming (24, 48, 72 and 96 hours), followed by analyses of regression. It is concluded that the priming has no effect on germination and affects positively the vigor of the gherkin seeds lots; osmopriming with potassium nitrate is effective in improving the physiological quality of gherkin seeds lot.

Physiological Quality in Leucaena leucocephala Seeds Conditioned with Potassium Nitrate Submitted to Saline and Water Stresses

2019 ◽  
pp. 1-9
Author(s):  
Jackson Araújo Silva ◽  
Iris Renata Freire Silva ◽  
Andréa Celina Ferreira Demartelaere ◽  
André Dantas De Medeiros ◽  
Marcio Dias Pereira
Keyword(s):  
Leucaena Leucocephala ◽  
Nitrate Solution ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Saline Stress ◽  
Water Restriction ◽  
Initial Development ◽  
Seedling Length ◽  
Physiological Quality ◽  
The Impact

Leucaena leucocephala is a species that occurs in semi-arid regions capable of developing physiological and biochemical strategies under adverse environmental situations, such as saline soils and water deficiency. Even so, there are still losses in germination and initial development of plants, mainly due to abiotic stress effects, making it necessary to implement alternatives which are able to diminish the impact on the seeds with the use of potassium nitrate. The objective of this work was to evaluate the physiological quality in L. leucocephala seeds conditioned in potassium nitrate solution and subjected to saline and water stresses. After scarification, the unconditioned leucine seeds were separated and identified, and the conditioners were immersed in the 1.0 Mmol/L solution of potassium nitrate for 24 hours. The treatments were NaCl: 0; 30; 60; 90; 120 and 150 Mmol/L and the water potential: 0, 0; -0.2; -0.4; -0.6, and -0.8 MPa. The seeds were distributed over two Germitest® sheets, moistened with distilled water 2.5 times the dry weight and incubated in a B.O.D. at 25°C for 10 days. Then, the germination speed index, seedling length and seedling mass were measured for the normal seedlings. Eleven treatments with four replicates of 50 seeds were used. The design was completely randomized, and the statistical analyzes were performed in SAS. The use of potassium nitrate (KNO3) contributed to maintaining the physiological quality of L. leucochephala seeds under conditions of saline stress and water restriction.

scholarly journals Foliar fungicide and environments on the physiological quality of oat seeds

2014 ◽  
Vol 36 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Eliege Aparecida de Paiva Oliveira ◽  
Claudemir Zucareli ◽  
Inês Cristina de Batista Fonseca ◽  
José Carlos de Oliveira ◽  
Alberto Sérgio do Rego Barros
Keyword(s):  
Grain Yield ◽  
Seed Quality ◽  
Block Design ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Dry Weight ◽  
Oat Seeds ◽  
Physiological Quality ◽  
Foliar Fungicide

The oat crop is of great economic importance and seed production depends on several factors (biotic and abiotic) that can alter its quality. Thus, the study aimed to evaluate the physiological quality of oat seeds produced with and without application of foliar fungicide in contrasting environments. The experimental design was a randomized block design in a factorial 6x2 (cultivar x fungicide) for each site, with four replications. The physiological quality of seeds was evaluated by grain yield, germination, first count, accelerated aging, moisture content after accelerated aging, seedling length, seedling dry weight, electrical conductivity and seedling emergence in field. Data were subjected to joint and individual analysis of variance, and means were compared by Tukey’s test at 5%. Grain yield in Mauá da Serra is superior to Londrina, Parana State - Brazil, but the seed quality is lower, although all cultivars have shown germination above 90% in the two cultivation sites. Cultivars FAEM 6 DILMASUL and UPFA OURO showed no disease, indicating possible resistance. The application of the product has a beneficial effect on seed germination and vigor, even in the absence of disease.

scholarly journals Mineral supplementation of soybean seeds with different initial nutrient levels

2020 ◽  
Vol 42 ◽  
pp. e42484
Author(s):  
Gerusa Massuquini Conceição ◽  
Vinícius dos Santos Cunha ◽  
Glauber Monçon Fipke ◽  
Lucas Allan Bruning ◽  
Anderson da Costa Rossato ◽  
...  
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Seedling Emergence ◽  
Field Performance ◽  
Dry Weight ◽  
Nutrient Content ◽  
Soybean Seeds ◽  
Mineral Supplementation ◽  
Physiological Quality

The objectives of this study were to evaluate the effect of the chemical composition of soybean seeds and the efficiency of seed mineral supplementation on physiological quality and field performance. Two seed lots (high and low levels of mineral nutrition), with or without supplemental macro- and micronutrients, of three soybean cultivars (BMX Potência RR, BMX Turbo RR, and BMX Magna RR) were used. For the laboratory experiment, a completely randomized design with four replications was used. To evaluate the physiological quality of the seeds, the water content, first count, germination, 1,000-seed weight, and length and dry weight of the seedling were determined. For the field experiment, a randomized block design with four replications was used, and seedling emergence and grain yield were evaluated. Seeds with higher nutrient content produced seedlings of greater vigor and higher grain yield for all of the cultivars studied. The use of mineral supplementation in seed lots with low nutrient content resulted in greater vigor under laboratory conditions. The increase in grain yield after mineral supplementation depends on the quality of the seed lot.

scholarly journals Evaluation of seed physiological quality of papaya elite hybrids, their reciprocal crosses and parents

2013 ◽  
Vol 35 (2) ◽  
pp. 190-197 ◽  
Author(s):  
Célia Maria Peixoto de Macedo ◽  
Messias Gonzaga Pereira ◽  
Deisy Lúcia Cardoso ◽  
Roberto Ferreira da Silva
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Dry Weight ◽  
Fresh Weight ◽  
Reciprocal Effect ◽  
F1 Hybrid ◽  
Reciprocal Crosses ◽  
Randomized Design ◽  
Physiological Quality

This study aimed to evaluate the physiological quality of seeds of three hybrid combinations and their reciprocals, as well as the selfed parents, and to estimate genetic parameters associated with seed quality, and possible reciprocal effects. The experiment used F1 hybrid papaya seeds and their reciprocal crosses between JS12 and Sunrise Solo 72/12, Sekati and Waimanalo, and the seeds of the parents and two varieties, totaling 12 treatments in a completely randomized design with four replications. Weight of 1,000 seeds, germination, seedling fresh weight and seedling dry weight, first count, speed of germination and seedling emergence were determined. There was no xenia effect for weight of 1,000 seeds and seedling fresh weight. The reciprocal effect was not expressed for germination and seedling emergence, while for the other traits, it was not expressed only for JS12 x Sekati. Differences among hybrids and their parents occurred as a result of the action of pollen in the crosses, and justified by early heterosis. The most sensitive vigor tests to discriminate differences in performance of hybrids and their reciprocals were speed of germination and seedling fresh weight. There were high magnitudes of the estimates for the genotypic determination coefficient for most of the evaluated variables, except for seedling fresh weight.

scholarly journals PRIMING AND GROWTH INHIBITOR IN THE PRODUCTION OF HIGH-QUALITY PEPPER SEEDLINGS

2021 ◽  
Vol 8 (2) ◽  
pp. e5828
Author(s):  
Abimael Gomes Silva ◽  
Flávio Ferreira da Silva Binotti ◽  
Adriana Hernandes Pinto Matos ◽  
Talita Cristina Campos Pereira da Silva ◽  
Tatiane Carla Silva ◽  
...  
Keyword(s):  
Growth Regulator ◽  
Seedling Emergence ◽  
Calcium Nitrate ◽  
Growth Inhibitor ◽  
Potassium Nitrate ◽  
Randomized Design ◽  
Seed Conditioning ◽  
Completely Randomized Design ◽  
Control Water

This study aimed to evaluate the effect of nitrate salts and a growth regulator on seed conditioning. Subsequently, the responses of the influence of the leaf application of paclobutrazol (PBZ) and nitrogen on the quality of seedlings of Capsicum frutescens L. were evaluated. Two experiments were carried out. The first experiment was conducted in a completely randomized design to evaluate priming, as follows: T1 – control, T2 – control (water), T3 – 0.2% calcium nitrate, T4 – 0.2% potassium nitrate, T5 – 0.1% calcium nitrate + 0.1% potassium nitrate, T6 – PBZ, and T7 – PBZ + 0.1% calcium nitrate + 0.1% potassium nitrate. The second experiment was carried out in a completely randomized design in a 2×5 factorial scheme consisting of priming (absence and presence of calcium nitrate) and leaf application of growth regulator, as follows: control (water), PBZ, PBZ + 1% nitrogen (calcium nitrate), PBZ + 1% nitrogen (urea), and PBZ + nitrogen (0.5% calcium nitrate + 0.5% urea). Physiological conditioning with a solution of 0.1% calcium nitrate increased the germination and seedling emergence rate and resulted in seedlings with a higher shoot length at 33 days after sowing (DAS), but seedlings at 50 DAS showed no differences in growth with its use. Leaf application of 0.1% paclobutrazol provided pepper (C. frutescens L.) seedlings with better distribution in growth according to the Dickson quality index.

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 Foliar application of silicon and the effect on wheat seed yield and quality

2013 ◽  
Vol 35 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Samantha Rigo Segalin ◽  
Caroline Huth ◽  
Thais D'Avila Rosa ◽  
Diógenes Barella Pahins ◽  
Liliane Marcia Mertz ◽  
...  
Keyword(s):  
Seed Yield ◽  
Foliar Application ◽  
Accelerated Aging ◽  
Dry Weight ◽  
Wheat Cultivars ◽  
Wheat Seed ◽  
Germination Test ◽  
Yield And Quality ◽  
Physiological Quality

Adequate nutrients for plants are important for increasing the yield and quality of the seeds produced. The objective of this study was to evaluate foliar fertilization with silicon in wheat and its effect on seed yield and physiological quality. Treatments consisted of two silicon dosages (three and six liters silicon per hectare) and the control (no silicon) and five wheat cultivars: OR "Quartzo", OR "Ônix", Fundacep "Linhagem", Fundacep "Campo Real" and Fundacep "Horizonte". The experimental design was randomized blocks with four replications. After physiological maturity, harvesting and threshing of the seeds were done manually. Seed samples were evaluated for yield and physiological quality from the germination test, first germination count, seedling dry weight, accelerated aging, electrical conductivity, 1000 seeds and hectoliter weights. The results showed that the foliar application of silicon at the dosages tested did not affect the yield and physiological quality of the seeds produced by the wheat cultivars.

scholarly journals Use of seed treatment with fungicide in control of colletotrichum truncatum and physiological quality of soybean seeds glycine max

2013 ◽  
Vol 4 (2) ◽  
pp. 98-106
Author(s):  
Vinícius Almeida Oliveira ◽  
Lorenxo Paradiso Martins ◽  
Rogério Cavalcante Gonçalves ◽  
Luíz Paulo Figueredo Benício ◽  
Daniella Lima da Costa ◽  
...  
Keyword(s):  
Glycine Max ◽  
Seed Treatment ◽  
Pathogenic Fungus ◽  
Dry Weight ◽  
Soybean Seeds ◽  
Colletotrichum Truncatum ◽  
Fresh Weight ◽  
Crop Development ◽  
Physiological Quality

The fungus are the main microorganisms present in seeds, is the main cause of deterioration and loss in production. The anthracnose caused by C. truncatum associated with soybean seeds as has main vehicle for introduction into the planting areas can be detected in all stages of crop development, from the cotyledons to the end of the cycle, being present in the stems, veins, leaflets and pods. Thus aimed to evaluate the influence of using different products fungicides as seed treatment, where the seeds were inoculated with the pathogenic fungus and treated with the chemicals They take Carbedazim + Fludioxonil + metalaxyl-M and carboxin + thiram. For each fungicide product was two tramentos done using the doses recommended by the manufacturer and 75% of dose. We evaluated health, germination and promote plant (Plant growth, fresh weight and dry weight of root and shoot). This work concludes that the use of fungicide controls significantly seeds infected with C. truncatum and presents a significant improvement as the development of structures seedling.

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