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

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.

Download Full-text

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

Journal of Seed Science ◽

10.1590/2317-1545v43241586 ◽

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.

Download Full-text

Germination and vigour of primed asparagus seeds

Scientia Agricola ◽

10.1590/s0103-90162005000400003 ◽

2005 ◽

Vol 62 (4) ◽

pp. 319-324 ◽

Cited By ~ 10

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.

Download Full-text

Physiological quality of mechanically harvested chickpea seeds

Revista Engenharia na Agricultura - REVENG ◽

10.13083/reveng.v29i1.10907 ◽

2021 ◽

Vol 29 ◽

pp. 28-35

Author(s):

Letícia Betânia Xavier Dias ◽

Pedro Afonso de Melo Queiroz ◽

Thaís Cardoso de Castro ◽

Marco Antonio Moreira de Freitas ◽

Érica Fernandes Leão-Araújo ◽

...

Keyword(s):

Electrical Conductivity ◽

Significant Interaction ◽

Seed Quality ◽

Rotation Speed ◽

Mechanical Damage ◽

Seed Vigor ◽

Rotor Rotation ◽

Germination Speed ◽

Physiological Quality

Our objective was to evaluate the occurrence of mechanical damage in chickpea seeds with the combination of two harvester speeds (2.5 and 3.5 km.h-1) and three adjustments for rotor rotation speeds (500, 700, and 850 rpm). Harvesting was carried out in a seed production field. Seeds were evaluated for purity, germination (G), first count (FC), germination speed index (GSI), hypochlorite, electrical conductivity, and tetrazolium tests. There was an effect of harvester speeds on seed physiological quality for the first count (FC), germination (G), germination speed index (GSI), especially when combining with high rotor rotation speed. In these cases, the speed of 2.5 km.h-1 resulted in lower values. This harvester speed also had worse results when combining with 850 rpm for purity and hypochlorite tests. The tetrazolium test was not efficient in identifying differences in seed quality. There was no significant interaction between harvester speeds and rotor rotation speeds for the conductivity test. Evaluating the harvester speed’s isolated effect (3.5 km.h-1), we identified problems in seed vigor due to the higher value of exudates in the electrical conductivity test. Low harvester speed (2.5 km.h-1) associated with high rotor rotation speeds (700 and 850 rpm) causes a reduction of the physical and physiological quality of seeds.

Download Full-text

Tests for evaluating the physiological quality of pitaya seeds

Semina Ciências Agrárias ◽

10.5433/1679-0359.2015v36n6sup2p4047 ◽

2015 ◽

Vol 36 (6Supl2) ◽

pp. 4047

Author(s):

Thiago Alberto Ortiz ◽

Aline Moritz ◽

Lúcia Sadayo Assari Takahashi ◽

Mariana Ragassi Urbano

Keyword(s):

Electrical Conductivity ◽

Pearson Correlation ◽

Accelerated Aging ◽

Seed Vigor ◽

Water Volume ◽

Germination Test ◽

Accelerated Aging Test ◽

Aging Test ◽

Physiological Quality

Germination test is used to assess the physiological quality of seeds; however, since it is carried out under ideal conditions, this test has not been shown sufficient for this purpose. Instead, it is possible to use vigor tests, although the lack of standardized methodologies has reduced their applicability and reproducibility. Thus, this study aimed to develop methodologies for conducting tests of germination, accelerated aging, and electrical conductivity for the evaluation of the physiological quality of pitaya seeds. For this purpose, seeds from ripe Hylocereus undatus fruits were used. A completely randomized experimental design was used with four replications. The physiological quality of the seeds was assessed using germination, accelerated aging, and electrical conductivity tests, and the speed of germination index (SGI) and mean germination time (MGT) were determined for both the germination test and accelerated aging test. For the statistical analysis, we performed regression model adjustments and calculated the Pearson correlation coefficient (p < 0.05). The germination test for H. undatus seeds can be performed at 25 °C, with the aim of reaching the highest SGI and lowest MGT values. The accelerated aging test can be conducted at 43 °C for 48 h, because combining these factors favors the expression of seed vigor, allowing seeds to achieve the maximum SGI and minimum MGT, while reducing the time of the assay. The electrical conductivity test can be performed using 25 seeds at a temperature of 30 °C and a water volume of 10 mL, since under these conditions there is less interference from external factors on the leachate content of the solution.

Download Full-text

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

Journal of Seed Science ◽

10.1590/2317-1545v41n2211401 ◽

2019 ◽

Vol 41 (2) ◽

pp. 187-195 ◽

Cited By ~ 2

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.

Download Full-text

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

Journal of Seed Science ◽

10.1590/2317-1545v39n2175179 ◽

2017 ◽

Vol 39 (2) ◽

pp. 174-181 ◽

Cited By ~ 7

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.

Download Full-text

Phosphorus rates on yield and quality of lettuce seeds

Horticultura Brasileira ◽

10.1590/s0102-05362012000400021 ◽

2012 ◽

Vol 30 (4) ◽

pp. 695-698 ◽

Cited By ~ 3

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%).

Download Full-text

Maturation fruits and drying on quality of crambe seeds

Journal of Seed Science ◽

10.1590/2317-1545v43235272 ◽

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.

Download Full-text

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

Revista Árvore ◽

10.1590/0100-67622016000500009 ◽

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. .

Download Full-text

Quality of soybean seeds treated with fungicides and insecticides before and after storage

Journal of Seed Science ◽

10.1590/2317-1545v38n4161760 ◽

2016 ◽

Vol 38 (4) ◽

pp. 278-286 ◽

Cited By ~ 8

Author(s):

Thaís Francielle Ferreira ◽

João Almir Oliveira ◽

Rafaela Aparecida de Carvalho ◽

Laís Sousa Resende ◽

Cassiano Gabriel Moreira Lopes ◽

...

Keyword(s):

Seed Treatment ◽

Seedling Emergence ◽

Control Group ◽

Soybean Seeds ◽

Before And After ◽

Negative Effect ◽

Health Quality ◽

Physiological Quality ◽

Treatment Application

Abstract: The timing of seed treatment application is important to keep soybean seeds quality. Therefore, the aim of this study was verify the effect of fungicides and insecticides treatment in soybean seeds quality before and after storage. Seeds of NS 7494, NS 8693 and NS 7338 IPRO were utilized and analyses separately, through a factorial scheme 3x6, with three application moments: treated and assessed; treated, stored and assessed; stored, treated and assessed; and six combination of fungicides and insecticides: Cropstar(r) + Derosal Plus(r); Cropstar(r) + Maxim xl(r); Cruiser(r) + Derosal Plus(r); Cruiser(r)+ Maxim xl(r); Standak Top(r) and the control group. Germination, seedling emergence, accelerate aging, cold and health tests were performed. It was determined that the combination with Cruiser(r) doesn't affect the physiological quality of soybean seeds treated and assessed, and treated after two month of storage. Cropstar(r) + Derosal plus(r) keeps physiological quality of soybean seeds stored and treated for two months, while Standak top(r) has negative effect. The combination with Cropstar(r) damages the physiological quality of soybean seeds treat after two months of storage. The fungicide Derosal plus(r) improves the health quality of soybean seeds regardless treatment moment.

Download Full-text