scholarly journals Trinexapac-ethyl and topdressing nitrogen levels on the productivity and physiological quality of graniferous white oat seeds

2018 ◽  
Vol 40 (3) ◽  
pp. 263-271
Author(s):  
José Henrique Bizzarri Bazzo ◽  
Carlos Roberto Riede ◽  
Klever Marcio Antunes Arruda ◽  
André Prechlak Barbosa ◽  
Inês Cristina de Batista Fonseca ◽  
...  
Keyword(s):  
Plant Growth ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
N Fertilization ◽  
Growth Retardant ◽  
Nitrogen Levels ◽  
Oat Seeds ◽  
Physiological Quality

Abstract: The aim of this study was to evaluate the physiological quality of white oat seeds cultivated under different topdressing N levels combined with the plant growth retardant trinexapac-ethyl in two growing environments. The experiments were carried out in Londrina and Mauá da Serra Municipalities (PR, Brazil) with the cultivar ‘IPR Afrodite’. The experimental design was in randomized blocks, in a 4x2 factorial arrangement, with four replications. Treatments consisted of four N levels (0, 30, 60, and 90 kg.ha-1) combined or not with the plant growth retardant. Seed yield, 1000-seed weight, germination, first germination count, seedling length, seedling dry matter, accelerated aging, electrical conductivity, emergence speed index, and seedling emergence in sand were evaluated. Data were submitted to the analysis of variance and then to the F test and regression analysis up to the second degree (p≤0.05). The application of the plant growth retardant and N topdressing led to an increase in seed productivity in Mauá da Serra. N fertilization reduced seed quality, but this effect can be minimized, not observed or overlapped by the positive effect of the plant growth retardant. Such an effect depends on environmental characteristics and it was not observed in Londrina.

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 Physiological quality of dynamically cooled and stored soybean seeds

2013 ◽  
Vol 35 (3) ◽  
pp. 353-360 ◽  
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.

scholarly journals Fruit maturation stage on the physiological quality of maroon cucumber seeds

2019 ◽  
Vol 49 ◽  
Author(s):  
Cleisson Dener da Silva ◽  
Andréia Márcia Santos de Souza David ◽  
Josiane Cantuária Figueiredo ◽  
Jorge Luiz Rodrigues Barbosa ◽  
Rayane Aguiar Alves
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Dry Mass ◽  
Maturation Stage ◽  
Physiological Maturity ◽  
Physiological Quality ◽  
Photography Analysis ◽  
The Ideal

ABSTRACT To obtain seeds of high physiological quality, it is of paramount importance to define the ideal harvest moment, which oftentimes corresponds to the period when the physiological maturity is reached. This experiment aimed to study the maturation process and determine the best harvest season of maroon cucumber fruits (Liso Gibão cultivar), in order to reach the maximum physiological seed quality. The flowers were labeled during the anthesis and the fruits harvested at 14, 21, 28, 35, 42, 49 and 56 days after the anthesis (DAA). The fruits had their visual aspects registered by photography analysis and, later, the seeds were extracted for physical (water and dry matter contents) and physiological (germination, seedling emergence, emergence speed index, accelerated aging and electrical conductivity) analyses. It was observed that the seeds reach the maximum dry mass (8.08 mg seed-1) between 47 and 49 DAA. However, the seed physiological maturity, characterized by a maximum germination (70 %) and vigor, occurs at 56 DDA. The best season to harvest seeds with a higher physiological quality takes place from 49 to 56 DDA, when the fruits present a yellowish color.

scholarly journals PHYSIOLOGICAL QUALITY OF MUNG BEAN SEEDS ACCORDING TO THE PLANT DENSITY

2019 ◽  
Vol 6 (4) ◽  
pp. 29-35
Author(s):  
Edvan Costa Silva ◽  
Nei Peixoto ◽  
Natália Arruda ◽  
Natália Cássia de Faria Ferreira ◽  
Luís Augusto Batista de Oliveira
Keyword(s):  
Mung Bean ◽  
Seed Quality ◽  
Plant Density ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Dry Mass ◽  
Row Spacing ◽  
State University ◽  
Physiological Quality

Mung beans (Vigna radiata L.) are of Asian origin and have gained national importance with the production of moyashi. The study aimed to evaluate the seed physiological quality of mung beans according to the row spacing and number of plants per meter. The experiment was conducted at Goiás State University, Ipameri Campus. Tests were performed to determine the water content, germination, and vigor to evaluate the physiological quality of the seeds. The experimental design was completely randomized, with the treatments arranged in a 2 x 6 factorial scheme, having as factors the row spacing (25 and 50 cm) and the number of plants per meter (4, 8, 12, 16, 20, and 24 plants) with four replications. Based on the results of the analysis of variance, germination, first germination count, and emergence speed index were not influenced by row spacing and number of plants per meter. The shoot length of seedlings was significative affected by row spacing and the number of plants per meter. For root length, seedling dry mass and thousand-seed weight there was significant interaction between the studied factors. There was significant effect of row spacing on accelerated aging and seedling emergence. The mung bean plant density affected seed quality. Seeds produced with a row spacing of 50 cm with 24 plants per meter had the best physiological potential.

scholarly journals Physiological quality of eggplant seeds with different extraction and drying methods

2013 ◽  
Vol 35 (1) ◽  
pp. 51-55 ◽  
Author(s):  
Leomara Vieira de França ◽  
Mariana Dierings Croda ◽  
Warley Marcos Nascimento ◽  
Raquel Alves de Freitas
Keyword(s):  
Hydrochloric Acid ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Drying Methods ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Seed Extraction ◽  
Physiological Quality

During seed extraction in fleshy fruits, some procedures are necessary to ensure seed quality and minimize deterioration and microorganism activity; also seeds extracted under moist conditions need special care when drying. The objective of this study was to evaluate the physiological quality of eggplant seeds submitted to different extraction and drying methods. In the first study, whole eggplant fruits were mechanically crushed and then fermented for 0, 24 and 48 hours, with and without applying hydrochloric acid during seed extraction. In the second study, seeds were extracted in a pepper peeler and then immediately washed in water and submitted to the following drying methods: Sun/24 h; Sun/48 h; 32 °C/24 h; 32 °C/48 h; 38 °C/24 h; 38 °C/48 h; Sun/24 h + 32 °C/24 h; Sun/24 h + 38 °C/24 h e 32 °C/24 h + 38 °C/24 h. The treatment efficiency of both experiments was evaluated from the following tests: seed weight, germination, first count, accelerated aging and seedling emergence. The results suggest that fermentation and applying hydrochloric acid to pulp/seed reduce the physiological seed quality. All drying methods reduced the seed moisture content permitting adequate storage and maintenance of seed physiological quality.

scholarly journals Drying kinetics and physiological quality of ‘Cabacinha’ pepper seeds during storage

2018 ◽  
Vol 22 (4) ◽  
pp. 292-297 ◽  
Author(s):  
Hellismar W. da Silva ◽  
Luís S. R. Vale Junior ◽  
Camila F. Silva ◽  
Rannie do C. Souza ◽  
Renato S. Soares
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
High Moisture ◽  
Germination Test ◽  
Different Temperatures ◽  
Physiological Quality ◽  
Drying Curves ◽  
And Storage

ABSTRACT Drying air temperature has direct influence on seed quality, especially for vegetable species harvested with high moisture content. This study aimed to determine and model the drying curves of ‘Cabacinha’ pepper seeds (Capsicum chinense L.) at different temperatures, and to evaluate their physiological quality after drying and during storage. The experimental design was completely randomized in a 3 x 3 factorial scheme, with three drying temperatures (35, 38 and 42 °C) and three storage periods (0, 4 and 8 months), with four replicates. Seed quality was evaluated by germination test, first germination count, accelerated aging, electrical conductivity, seedling emergence, and speed of emergence. The Two Terms is the model that best represents the drying curves of ‘Cabacinha’ pepper seeds at temperatures of 35, 38 and 42 °C. Higher germination and vigor values are obtained in seeds dried at 35 and 38 °C. Drying at 42 °C and storage reduce the physiological quality of the seeds.

scholarly journals Physiological quality of soybean seeds of cultivars submitted to harvesting delay and its association with seedling emergence in the field

2013 ◽  
Vol 35 (2) ◽  
pp. 147-152 ◽  
Author(s):  
Fábio Oliveira Diniz ◽  
Múcio Silva Reis ◽  
Luiz Antônio dos Santos Dias ◽  
Eduardo Fontes Araújo ◽  
Tuneo Sediyama ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Test Results ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Physiological Quality ◽  
The Relationship

With the aim of studying the relationship between the physiological quality of soybean seeds submitted to three harvest times and seedling emergence in the field, seeds of cultivars UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia and Celeste were harvested at stages R8, R8+15 and R8+30 days. The following tests were performed: accelerated aging, electrical conductivity, emergence in sand, emergence speed index and seedling emergence in the field. Germination and vigor were reduced in seeds harvested at 30 days after stage R8 in all the tests, except for the accelerated aging test, which showed a decline in vigor seeds harvested with a delay of 15 days. Seeds of cultivars UFV-16, Confiança and Garantia showed lower physiological quality in most tests, while the seeds of cultivar Celeste had higher physiological quality than the others. There was similarity between the test results of seed quality and seedling emergence in the field.

scholarly journals Productivity and physiological quality of seeds with burn down herbicides at the pre harvest of bean crops

2014 ◽  
Vol 36 (4) ◽  
pp. 384-391 ◽  
Author(s):  
Marlo Adriano Bison Pinto ◽  
Claudir José Basso ◽  
Stela Maris Kulczynski ◽  
Cristiano Bellé
Keyword(s):  
Management Practices ◽  
Seed Quality ◽  
Block Design ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Production Environment ◽  
Glufosinate Ammonium ◽  
Time Of Application ◽  
Physiological Quality

The physiological quality of bean seeds is influenced by the production environment and management practices employed during cultivation. The objective of this study was to evaluate the productivity and physiological quality of bean seeds after desiccant applications at different times at pre-harvest. A randomized block design was used, with a factorial (3x3) + 1 arrangement, where the application of three desiccants was tested: glyphosate (960 g a.i. ha-1), paraquat dichloride (240 g a.i. ha-1) and glufosinate ammonium (400 g a.i. ha-1) + mineral oil, applied three times (days after flowering - DAF), and a control without herbicide in four replications. Seed quality was determined by the following tests: germination, first count, seedling emergence speed rate, accelerated aging, electrical conductivity and seedling dry biomass. Seed yield was not influenced by either herbicides or time of application. Regardless of time of application, the lowest percentage of normal seedlings after the germination, first count and accelerated aging tests was observed in seeds desiccated with the herbicide glufosinate ammonium. The herbicide glyphosate reduces seedling vigor. The times of application of the product paraquat dichloride did not affect the germination and vigor of bean seeds.

scholarly journals Lignification of the plant and seed quality of RR soybeans sprayed with herbicide glyphosate

Revista CERES ◽  
2013 ◽  
Vol 60 (2) ◽  
pp. 286-292
Author(s):  
Cristiane Fortes Gris ◽  
Edila Vilela de Resende Von Pinho ◽  
Maria Laene de Moreira Carvalho ◽  
Rafael Parreira Diniz ◽  
Thaís de Andrade
Keyword(s):  
Seed Quality ◽  
Lignin Content ◽  
Block Design ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Randomized Block Design ◽  
Physiological Quality ◽  
Hand Weeding ◽  
Herbicide Glyphosate

Differences in levels of lignin in the plant between conventional and transgenic cultivars RR has been reported by several authors, however, there are few studies evaluating the influence of spraying of glyphosate on the lignin in the plant and RR soybean seeds. The aim of this study was to evaluate the physiological quality of RR transgenic soybean seeds and the lignin contents of plants sprayed with the herbicide glyphosate. The assays were conducted both in greenhouse and field in the municipality of Lavras, MG, in the agricultural year 2007/08. The experiment was arranged in a splitplot design with four replicates, considering the treatments hand weeding and herbicide glyphosate as plots, and five RR soybean cultivars (BRS 245 RR, BRS 247 RR, Valiosa RR, Silvânia RR and Baliza RR) as splitplots. In the greenhouse, the cultivars tested were BRS 245 RR and Valiosa RR in a randomized block design with four replicates. The sprayings were carried out at stages V3, V7 and early R5 (3L/ha). The 1000 seed weight, mechanical injury, germination and germination velocity index, emergence velocity index, accelerated aging, electrical conductivity and water soaking seed test, lignin content in the seed coat, in the stem and legumes were determined. The spraying of glyphosate herbicide, in greenhouse and field, did not alter the physiological quality of seeds and the lignin contents in the plant.

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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