scholarly journals Yield and quality of soybean seeds inoculated with Bacillus subtilis strains

2020 ◽  
Vol 24 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Tauan R. Tavanti ◽  
Renan F. R. Tavanti ◽  
Fernando S. Galindo ◽  
Isadora Simões ◽  
Larissa S. Dameto ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Seed Quality ◽  
Storage Proteins ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Sprinkler Irrigation ◽  
Seed Vigor ◽  
Soybean Cultivars ◽  
Yield And Quality

ABSTRACT The use of growth-promoting bacteria can increase the yield and quality of seeds of several annual crops, such as soybean. Based on that, the present study aimed to evaluate the effects of the inoculation of Bacillus subtilis strains on seed treatment, evaluating the yield and quality of seeds of two soybean cultivars. The experiment was conducted in a conventional system, in an Oxisol of clayey texture, in a crop under sprinkler irrigation. The experimental design was randomized blocks, arranged in split plots with four repetitions. Treatments were composed, in the plots, of two soybean cultivars: M7110 IPRO and Brasmax Desafio RR. Within the levels of subplots, the treatments consisted of inoculation and doses of inoculant: Bacillus subtilis Pant001 strain at doses of 0, 2, 3, 4 and 5 mL kg-1, and QST713 strain at the recommended dose of 2 mL kg-1. Inoculation with the strains Pant001 and QST713 increased the yield of both soybean cultivars tested, besides improving seed quality due to the increase in the concentration of total storage proteins, seedling emergence percentage and seed vigor by the accelerated aging test.

scholarly journals Action of defense activator and foliar fungicide on the control of Asiatic rust and on yield and quality of soybean seeds

2013 ◽  
Vol 35 (2) ◽  
pp. 198-206 ◽  
Author(s):  
Bruno Oliveira Carvalho ◽  
João Almir Oliveira ◽  
Everson Reis Carvalho ◽  
Vinícius de Andrade ◽  
Thaís Francielle Ferreira ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Soybean Seeds ◽  
Phakopsora Pachyrhizi ◽  
Breeding Lines ◽  
Yield And Quality ◽  
Seed Health ◽  
Foliar Fungicide

The objective of this study was to evaluate the influence of fungicide application (PrioriXtra®, azoxystrobin + ciproconazole) and defense activator (Bion®, acibenzolar-S-methyl) on the control of Asiatic rust (Phakopsora pachyrhizi), as well as the effect of the disease on the quality of soybean seeds. The experimental design was a randomized block in factorial 4 X 10 with three replications, with four soybean breeding lines, two disease-tolerant and two susceptible and ten managements of rust control, using the products Bion®, Priori Xtra® and their combination, applied once, twice and three times, and a control. It evaluated the rate of normalized difference vegetation, productivity, mass of 1000 seeds and seed quality by means of the germination, seedling emergence, accelerated aging and seed health tests. The use of the defense activator alone in the maximum of three applications is not effective in controlling rust. The fungicide used in conjunction or not with the defense activator is effective in controlling rust and improving seed quality, when used with three foliar applications. The defoliation caused by rust affects considerably the formation of seeds, as well as productivity and also the percentage of germination and seedling emergence, and is influenced by genotype.

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.

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 maturity and drying speed in the quality of zucchini ( Cucurbita pepo L.) seeds

2017 ◽  
Vol 39 (2) ◽  
pp. 142-149
Author(s):  
Hellismar Wakson da Silva ◽  
João Almir Oliveira ◽  
Lucinda Helena Fragoso Monfort ◽  
Jodson Moraes dos Santos ◽  
Ana Clara Reis Trancoso ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Seed Mass ◽  
Accelerated Aging ◽  
Maturity Stage ◽  
Physiological Maturity ◽  
Randomized Design ◽  
Maturation Stages ◽  
Seed Health Test

Abstract: Harvesting and drying are essential procedures to obtain high quality seeds as well as for their conservation during storage. The goal of this research was to identify the physiological maturity stage and to verify the effect of drying speeds on the quality of zucchini seeds. A completely randomized design in a 3x2x2 factor scheme was used, involving three fruit maturation stages (49, 56 and 63 days after anthesis - DAA), two drying speeds (slow and quick) and two storage periods (0 and 6 months). Seed quality was evaluated by germination, first count, accelerated aging, electrical conductivity, tetrazolium, seedling emergence, emergence speed index and seed health test. Moisture content, thousand seed mass and percentage full seeds were also evaluated. Zucchini seeds reach maximum quality at 49 DAA. Slow or quick drying and storage do not affect the physiological quality of seeds that were harvested at 49 DAA. The delayed harvest of fruits reduces the quality of seeds. Quick drying reduces the incidence of the fungi Alternaria, Cladosporium, Phoma and Fusarium, and increases the occurrence of Aspergillus and Penicillium.

scholarly journals Yield and quality of wheat seeds as a function of desiccation stages and herbicides

2014 ◽  
Vol 36 (1) ◽  
pp. 63-70 ◽  
Author(s):  
Cristiano Bellé ◽  
Stela Maris Kulczynski ◽  
Claudir José Basso ◽  
Tiago Edu Kaspary ◽  
Fabiane Pinto Lamego ◽  
...  
Keyword(s):  
Seed Quality ◽  
Wheat Cultivar ◽  
Accelerated Aging ◽  
Growth Stages ◽  
Yield And Quality ◽  
Phytotoxic Effect ◽  
Shoot Weight ◽  
Two Stages ◽  
Herbicide Glyphosate

This study aimed to evaluate the yield and seed quality of wheat, cultivar ‘Quartzo’, harvested after desiccation with two desiccants (glyphosate and paraquat) at two reproductive stages (11.2 and 11.3). The study used a randomized block experimental design in a 3 x 2 factorial arrangement (two desiccants and a control) and two growth stages of wheat, with four replications. The following were assessed: seed yield, thousand seed weight and seed quality (germination, first germination count, root and shoot weight, seedling dry and fresh weight, accelerated aging, electrical conductivity, cold germination, potassium leaching). Based on the results, it can be concluded that the use of desiccants on wheat at the two stages of development have not affected yield, but they have negatively influenced physiological seed quality. Generally, the herbicide glyphosate showed the lowest phytotoxic effect on seeds, and desiccant application at stage 11.2 resulted in higher physiological seed quality compared with application at stage 11.3.

scholarly journals Quality of maize seeds harvested and husked at high moisture levels

2013 ◽  
Vol 35 (3) ◽  
pp. 276-283 ◽  
Author(s):  
Valquíria de Fátima Ferreira ◽  
João Almir Oliveira ◽  
Thaís Francielle Ferreira ◽  
Leandro Vilela Reis ◽  
Vanessa de Andrade ◽  
...  
Keyword(s):  
Seed Quality ◽  
Seedling Emergence ◽  
Mechanical Damage ◽  
Accelerated Aging ◽  
Cold Test ◽  
High Moisture ◽  
Maize Seeds ◽  
Seed Moisture ◽  
Seed Health Test

Harvest of maize seeds with high moisture levels has been recommended; nevertheless, after harvest, the ears undergo the process of husking and there is a need to assess the compatibility of these processes. The purpose of this study was to assess the effects of mechanical husking on the quality of maize seeds collected at high moisture levels. Dent BM 3061 hybrid maize seeds, manually collected from the ear, with moisture contents of 45%, 40% and 35%, and a 20/64 round sieve were used. The ears were mechanically husked (CWA machine, 312 rpm), dried in a stationary drier at 35 ⁰C until reaching 22% moisture, followed by drying at 42 ºC until reaching 12%. Then, they underwent shelling, followed by a chemical treatment with Maxin® + K-obiol® + Actellic®. Seed quality was assessed according to the occurrence tests of mechanical damage, first count, germination, seedling emergence, emergence speed index, average emergence time, electrical conductivity, accelerated aging, cold test, and seed health test at every quarter for 9 months. The mechanical husking affects maize seed quality, depending on the degree of seed moisture at harvest and on the material studied. This hybrid's seeds can be collected with seed moisture levels at 40% with the use of mechanical husking.

scholarly journals Assessing the physiological quality of common bean seeds using the Vigor-S® system and its relation to the accelerated aging test

2019 ◽  
Vol 41 (2) ◽  
pp. 187-195 ◽  
Author(s):  
André Dantas de Medeiros ◽  
Laércio Junio da Silva ◽  
Nayara Pereira Capobiango ◽  
Camila Andrade Fialho ◽  
Denise Cunha Fernandes dos Santos Dias
Keyword(s):  
Common Bean ◽  
Seedling Emergence ◽  
Primary Root ◽  
Accelerated Aging ◽  
Growth Index ◽  
Automated Analysis ◽  
Seed Vigor ◽  
Analysis Technique ◽  
Physiological Quality

Abstract: Automated analysis of seed vigor stands out by allowing greater accuracy, standardization, objectivity, and speed in evaluation of the physiological potential of seed lots. The objective of this study was to evaluate the efficiency of the Vigor-S® system in assessing the physiological quality of common bean seeds compared to the information provided by the traditional vigor tests recommended for this species. Four genotypes of common bean were used, each one represented by four seed lots. Characterization of the physiological potential of the lots was carried out by the following tests: germination, first count of germination, seedling emergence, accelerated aging, and electrical conductivity. The results of these tests were compared with the data obtained from the image analysis technique, specifically the Vigor-S® system, which was used to evaluate seedling growth at two, three, and four days after the beginning of the germination test. Shoot length, primary root length, and seedling length were measured, as well as the growth index, uniformity index, and vigor index were calculated. Computerized analysis of seedling images using the Vigor-S® software is a reliable alternative for evaluation the physiological potential of bean seeds, and it produces information similar to evaluations traditionally used for that purpose.

scholarly journals Improved assessment of wheat seeds vigor

2012 ◽  
Vol 36 (6) ◽  
pp. 608-614 ◽  
Author(s):  
Tereza Cristina de Carvalho ◽  
Francisco Carlos Krzyzanowski ◽  
Osvaldo de Castro Ohlson ◽  
Maristela Panobianco
Keyword(s):  
Moisture Content ◽  
Filter Paper ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Seed Vigor ◽  
Wheat Seed ◽  
Efficient Procedure ◽  
Tetrazolium Test ◽  
Wheat Seeds

The tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into a 1.0% tetrazolium solution, at 30º C, for 3 h; and 3) longitudinal bisection, with subsequent immersion of one seed half into a 0.075% tetrazolium solution, at 40º C, for 2 h. It was concluded that the tetrazolium test is more efficient in evaluating wheat seed vigor when performed with immersion of one half of the seed into a 0.075% tetrazolium solution (40º C, for 2 h) or a 0.1% tetrazolium solution (30º C, during 3 h); allowing to sort seeds into four quality classes.

scholarly journals Spray volumes in the industrial treatment on the physiological quality of soybean seeds with different levels of vigor

2017 ◽  
Vol 39 (2) ◽  
pp. 174-181 ◽  
Author(s):  
Cristian Rafael Brzezinski ◽  
Julia Abati ◽  
Fernando Augusto Henning ◽  
Ademir Assis Henning ◽  
José de Barros França Neto ◽  
...  
Keyword(s):  
Experimental Design ◽  
Bradyrhizobium Japonicum ◽  
Seed Quality ◽  
Seedling Emergence ◽  
Seed Vigor ◽  
Soybean Seeds ◽  
Germination Test ◽  
Physiological Quality ◽  
Different Levels

Abstract: The aim of this work was to evaluate the effect of different spray volumes, via industrial treatment, on the physiological quality of soybean seeds with different levels of vigor. The experimental design was completely randomized in a 2x5 factor scheme, with four replications. Factors consisted in two levels of seed vigor (high and low) and five spray volumes (0, 600, 1200, 1800 and 2400 mL. 100 kg-1). Products used to obtain the volumes were: fungicide (carbendazin + thiram); insecticide (imidacloprid + thiodicarb); nematicide (abamectin); micronutrients (cobalt, molybdenum and zinc); polymer (peridiam); biostimulants (kinetin + gibberellic acid) and inoculum (Bradyrhizobium japonicum). The used cultivars were BRS 360 RR and BRS 1010 IPRO. The physiological seed quality was determined by the following evaluations: germination, first count of the germination test, seedling emergence in sand, emergency speed index, total length of shoot and root of the seedlings. In the different spray volumes, high vigor soybean seeds have higher physiological quality than low vigor seeds. The increased spray volumes in seed treatments reduce the physiological quality of low vigor soybean seeds.

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