scholarly journals Phosphorus rates on yield and quality of lettuce seeds

2012 ◽  
Vol 30 (4) ◽  
pp. 695-698 ◽  
Author(s):  
Cristiaini Kano ◽  
Antonio Ismael Inácio Cardoso ◽  
Roberto L Villas Bôas
Keyword(s):  
Seed Production ◽  
Seedling Emergence ◽  
Seed Vigor ◽  
Phosphorus Fertilization ◽  
Yield And Quality ◽  
Lettuce Seeds ◽  
Lack Of Information ◽  
Physiological Quality ◽  
Number Of Seeds

Because of lack of information about phosphorus fertilization in lettuce from the standpoint of seed production, this study was undertaken. The work was carried out in Botucatu, São Paulo state, Brazil, from September 25, 2003 to February 19, 2004, in order to study the influence of crescents phosphorus rates on yield and quality of lettuce seeds, cultivar Verônica. The experimental design was randomized blocks with five treatments (0; 200; 400; 600 and 800 kg ha-1 of P2O5) and five replications. The following characteristics were evaluated: seed production per plant (g plant-1), number of seeds per plant and quality (percentage of germination and seed vigor). A linear increasing was observed on production and number of seeds per plant of lettuce with phosphorus rates, but these rates did not affect the seed physiological quality evaluated on weight of 1,000 seeds (average = 0.91 g), first count of germination (98%), standard germination test (99%), seed germination speed index (68.5), seedling emergence speed index (97.0) and emerged seedlings (49.3%).

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 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 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.

scholarly journals Suplementação de boro em diferentes épocas: Efeito no rendimento e na qualidade de sementes de trigo

2016 ◽  
Vol 11 (2) ◽  
pp. 05
Author(s):  
Andre Pich Brunes ◽  
Elisa Souza Lemes ◽  
André Oliveira de Mendonça ◽  
Sandro de Oliveira ◽  
Francisco Amaral Villela
Keyword(s):  
Application Time ◽  
Germination Test ◽  
Plant Seed ◽  
Factor B ◽  
Yield And Quality ◽  
Physiological Quality ◽  
Effect On Yield ◽  
Thousand Seed Weight ◽  
Number Of Seeds

<p>O objetivo do trabalho foi avaliar a influência da aplicação de boro em diferentes épocas no rendimento e na qualidade de sementes de trigo. O delineamento experimental utilizado foi inteiramente casualizado em esquema fatorial A X B, sendo o fator A: cultivares FUNDACEP Horizonte e BRS Campeiro, e fator B: época de aplicação, (Sem aplicação de boro, aplicação na semeadura, no perfilhamento, na floração e 15 dias após floração). A dose de boro aplicada, via solo, em todas as épocas foi de 10 kg ha<sup>-1</sup> na forma de tetraborato de sódio (boráx). Após a colheita, avaliaram-se número de espigas, número de sementes por planta, rendimento de sementes por planta, peso hectolítrico e peso de mil sementes. A qualidade fisiológica das sementes produzidas foi avaliada por testes de vigor e de germinação. A adubação de trigo com 10 kg ha<sup>-1 </sup>de boro na forma de bórax nas diferentes épocas de aplicação, não prejudica rendimento, germinação e vigor das sementes das cultivares de trigo FUNDACEP Horizonte e BRS Campeiro. O peso volumétrico das sementes só teve redução na aplicação no perfilhamento para a cultivar FUNDACEP Horizonte e na floração para a cultivar BRS Campeiro.</p><p align="center"><strong><em>Boron supplementation at different times: Effect on yield and quality of wheat seeds</em></strong></p><p><strong>Abstract:</strong> The aim of this study was to evaluate the effect of boron application at different times on the yield and seeds quality of wheat. The experimental design was a completely randomized factorial AXB, with factor A: FUNDACEP Horizonte and BRS Campeiro cultivars, and factor B: application time, (No application of boron, application at sowing, tillering, flowering and 15 days after flowering). The boron dose into the soil at all times was 10 kg ha-1 in the form of sodium tetraborate (borax). After harvest, were evaluated number of ears, number of seeds per plant, seed yield per plant, hectoliter weight and thousand seed weight. The physiological quality of seeds produced was assessed through the vigor tests and germination test. Fertilizing wheat with 10 kg ha-1 of boron as borax at different times of application, without prejudice yield, germination and vigor of wheat FUNDACEP Horizonte and BRS Campeiro cultivars. The hectolitre weight of the seeds was reduced only in the application at tillering to FUNDACEP Horizonte cultivar and flowering for BRS Campeiro cultivar.</p><p><strong> </strong></p>

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 ELECTRICAL CONDUCTIVITY IN Piptadenia moniliformis Benth. SEED LOTS CLASSIFIED BY SIZE AND COLOR

2016 ◽  
Vol 40 (5) ◽  
pp. 855-866
Author(s):  
Gilvaneide Alves Azeredo ◽  
Rinaldo César de Paula ◽  
Sérgio Valiengo Valeri
Keyword(s):  
Electrical Conductivity ◽  
Sulfuric Acid ◽  
Seed Vigor ◽  
Round Hole ◽  
Seed Retention ◽  
Physiological Quality ◽  
Concentrated Sulfuric Acid ◽  
Number Of Seeds

ABSTRACT Among the most widely used tests for evaluating seed vigor, electrical conductivity (EC) stands out as one of the most promising due to its speed and simplicity. This study aimed to verify if the EC test could be used to evaluate the physiological quality of seed lots of Piptadenia moniliformis Benth. A seed lot, which was classified by seed tegument color and size, was used based on seed retention in round-hole screens, sizes 11 and 15, constituting 10 sub-lots. Prior to germination and the EC test, the seeds were immersed in concentrated sulfuric acid for 20 minutes in order to overcome tegument dormancy. During the EC test, we soaked seeds in 75 mL of water at 25 ºC and tested eight soaking periods (2, 4, 6, 24, 48, 72, 96, and 120 h) and two seed quantities (25 and 50) per replicate. The EC test, regardless of the number of seeds or soaking period, was not adequate for evaluating the physiological quality of color- or size-classified seed lots from P. moniliformis Benth. .

scholarly journals Water Stress in the Production and Quality of Bidens pilosa and Raphanus raphanistrum Seeds

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
M.R.R. PEREIRA ◽  
C.C. MARTINS ◽  
A.C. SILVA JR. ◽  
D. MARTINS
Keyword(s):  
Water Stress ◽  
Water Deficit ◽  
Seed Production ◽  
Water Availability ◽  
Soil Water Potential ◽  
Raphanus Raphanistrum ◽  
Bidens Pilosa ◽  
Physiological Quality ◽  
Number Of Seeds

ABSTRACT: Plants in soils with low water availability may present a reduction of their leaf area and photosynthetic rate, as well as lower assimilated compound supply for seeds. Knowing the physiological quality and seed production of weeds generated under water deficit conditions can help understanding the survival and competition strategies of species. The objective of this work was to evaluate the effect of water stress on the production and germination of Bidens pilosa and Raphanus raphanistrum seeds. Plants were maintained in soils with different water potentials (-0.03, -0.07 and -1.5 MPa) throughout their cycle, until seed production, when they were harvested. Then, evaluations were performed to find out the number of seeds per plant and number of seeds per pod (Raphanus raphanistrum). The evaluation on the germination of these seeds was performed on moistened paper, with four replications, at 20-35 oC and 8 hours of light per day, weekly, until 28 days after seeding. The experimental design was completely randomized with three treatments (soil water potential: -0.03 MPa, -0.07 MPa and -1.5 MPa). The results were submitted to analysis of variance by F test, and the means of the treatments were compared by Tukey’s test at 5% probability. It was concluded that Bidens pilosa is more adapted to water deficit conditions than Raphanus raphanistrum, due to the higher production of seeds, better germination and seedlings with greater vigor.

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 Accelerated aging of melon seeds

2003 ◽  
Vol 60 (1) ◽  
pp. 77-82 ◽  
Author(s):  
Salvador Barros Torres ◽  
Julio Marcos Filho
Keyword(s):  
Salt Solution ◽  
Seedling Emergence ◽  
Accelerated Aging ◽  
Seed Vigor ◽  
Traditional Procedure ◽  
Accelerated Aging Test ◽  
Aging Test ◽  
Physiological Quality ◽  
Melon Seeds

Accelerated aging is one of the most useful tests used for the evaluation of seed vigor but it is seldomly used to test melon (Cucumis melo L.) seeds. The objective this research was to compare different procedures of the accelerated aging test to evaluate the physiological quality of melon seeds and the efficiency of using saturated salt solution for the control of water uptake by seeds. Five seed lots each of the hybrids AF-646 and AF-682 were tested for germination, seedling emergence, traditional accelerated aging (periods 0f 48, 72 and 96 hours, at 38 or 41°C) and salt saturated accelerated aging. The accelerated aging test (traditional procedure and with salt solution) for 72h and 96h, at 38 or 41°C was sensitive to detect differences in the physiological quality of the seeds. It was also observed that the seed water content after salt saturated accelerated aging was lower and more uniform, thus presenting advantagens in relation to the traditional procedure.

scholarly journals Reproductive outputs of two sandalwood landraces with different genetic base and clonality levels in Gunung Sewu, Indonesia

2021 ◽  
Vol 914 (1) ◽  
pp. 012028
Author(s):  
A D C Putri ◽  
S Indrioko ◽  
A Nugroho ◽  
E Faridah ◽  
Y W N Ratnaningrum
Keyword(s):  
Seed Production ◽  
Seed Size ◽  
Inbreeding Depression ◽  
Seed Viability ◽  
Santalum Album ◽  
Genetic Base ◽  
Physiological Quality ◽  
Number Of Seeds

Abstract Based on the genetic base and clonality level, sandalwood (Santalum album) formed two types of landraces along with the Gunung Sewu Global Geopark Network in the southern part of Java islands, Indonesia. These two types are represented by Bejiharjo (which has a low genetic base and high clonality) and Bleberan (which has a high genetic base and low clonality) landraces. This study aimed to observe the quality of sandalwood seeds collected from the two landraces to determine the qualified seeds. We collected and tested all produced seeds of fruiting parent trees from August 2019 to March 2020. The physical and physiological quality tests included counting the number of seeds, measuring the seed size, and testing the viability of seeds. The Bleberan landrace produced 9161 seeds with 22.06% of seed viability. Meanwhile, the Bejiharjo produced only 158 seeds, of which all failed to germinate. Lower genetic base and higher clonality increased the inbred progenies, led to inbreeding depression, and decreased seed production and viability. Therefore, the qualified seed from the Bleberan landraces is worth considering to provide future genetic materials.

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