scholarly journals Sodium hypochlorite in the priming of tobacco seeds

2019 ◽  
Vol 41 (1) ◽  
pp. 108-111
Author(s):  
Camila Aparecida Lopes ◽  
Maria Laene Moreira de Carvalho ◽  
Renato Mendes Guimarães ◽  
Ariadne Morbeck Santos de Oliveira ◽  
Dayliane Bernardes de Andrade
Keyword(s):  
Electrical Conductivity ◽  
Sodium Hypochlorite ◽  
Tobacco Industry ◽  
Germination Index ◽  
Commercial Cultivar ◽  
Tobacco Seeds ◽  
Physiological Quality ◽  
Water Contents ◽  
Priming Technique

Abstract: Due to the non-uninform maturation of tobacco fruits and seeds, the priming technique has been used by the tobacco industry as a way of increasing the uniformity and germinations peed of seeds. Several factors can affect priming, including the time and environment in which the treatment is performed. In order to evaluate the effect of sodium hypochlorite as priming agent at different concentrations and the priming period on the physiological quality of the tobacco seeds, it was used a seed lot of commercial cultivar CSC 439 from the Virginia varietal group, widely used by the producing companies. The seeds were subjected to priming in aerated solution at different priming periods (180, 60, 30, 15, and 5 min) and concentrations of sodium hypochlorite (1%, 0.50%, 0.25%, and 0.10 %). The physiological quality was evaluated by the water contents, germination tests, first count, germination index, initial and final stands, emergence index and electrical conductivity. The priming with sodium hypochlorite did not affect germination, but allowed a higher percentage and speed of emergence when using the 1% concentration for 180, 30 and 15 min.

scholarly journals Effect of physiological priming on stored coffee seeds

2021 ◽  
Vol 43 ◽  
Author(s):  
Amanda Carvalho Penido ◽  
Édila Maria de Rezende ◽  
Diego de Sousa Pereira ◽  
Venícius Urbano Vilela Reis ◽  
Debora Kelli Rocha ◽  
...  
Keyword(s):  
Coffea Arabica ◽  
Dry Weight ◽  
The Other ◽  
Physiological Quality ◽  
Coffee Cultivation ◽  
Cold Chamber ◽  
Water Contents ◽  
Priming Technique

Abstract: The physiological priming has been used to standardize and increase the speed of development of seed lots. The use of this technique is essential in coffee cultivation, as the crop has low longevity associated with slow and uneven germination. The objective was to evaluate the effect of physiological priming on the physiological quality of coffee seeds stored with different water contents. Seeds of two cultivars of Coffea arabica were used: cv. Catuaí Vermelho IAC144 and Topázio MG1190. A portion of the seeds were dried in the shade until reaching 12% moisture, and the other did not undergo drying. The seeds were stored in a cold chamber at 10 °C for nine months. Every three months, the physiological priming technique was performed with subsequent evaluation of the physiological quality by germination tests, root protrusion, normal seedlings at fifteen days, strong normal seedlings, seedlings with expanded cotyledonary leaves and seedling dry weight. Seeds that did not undergo drying subjected to the physiological priming technique maintained physiological quality after nine months of storage. Physiological priming was detrimental to dry seeds stored for nine months.

scholarly journals Size and vigor of Anadenanthera colubrina (Vell.) Brenan seeds harvested in Caatinga areas

2017 ◽  
Vol 39 (4) ◽  
pp. 363-373 ◽  
Author(s):  
Jaciara de Souza Bispo ◽  
Danielle Carolina Campos da Costa ◽  
Samara Elizabeth Vieira Gomes ◽  
Gilmara Moreira de Oliveira ◽  
Janete Rodrigues Matias ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dry Matter ◽  
Folk Medicine ◽  
Germination Percentage ◽  
Climate Variations ◽  
Randomized Design ◽  
Mother Plants ◽  
Physiological Quality ◽  
Completely Randomized Design

Abstract: Angico is a species found in several environments in Brazil, with several applications. It is used in the timber industry and mainly in folk medicine. In order to verify a variation in the biometric characteristics and the quality of seeds from different mother-plants in different harvesting years, the following variables were studied: moisture content, diameter, density, electrical conductivity, fresh and dry matter of seedlings, germination percentage and kinetics, in a completely randomized design with a 2x3 factorial arrangement (lots x size). The obtained results showed that angico seeds from different lots showed different physiological quality, possibly due to the climate variations to which mother-plants were submitted in the different years. Seed size directly interferes with seedling growth under both controlled and greenhouse conditions, and it can be used as a vigor indicator for angico seeds.

scholarly journals PRODUCTION AND PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS IN ORTHIC QUARTZARENIC NEOSOIL OF THE CERRADO REGION

2015 ◽  
Vol 28 (4) ◽  
pp. 127-134
Author(s):  
CHARLINE ZARATIN ALVES ◽  
GUSTAVO MARTINS ZAQUEU ◽  
ERIC FABIANO SERAGUZI ◽  
AGUINALDO JOSÉ FREITAS LEAL ◽  
JOSUÉ BISPO DA SILVA
Keyword(s):  
Electrical Conductivity ◽  
Aerial Part ◽  
Water Distribution ◽  
Accelerated Aging ◽  
Dry Mass ◽  
Soybean Seeds ◽  
Scheme Design ◽  
Physiological Quality ◽  
Tetrazolium Test

ABSTRACT: The aim of this study was to evaluate the effect of the sowing periods in production, productivity component and physiological quality of seeds of three soybean cultivars (TMG133RR, P98Y70RR and NS7670RR) in Orthic Quartzarenic Neosoil in the cerrado region. The design used was a randomized block a factorial scheme design with four repetitions, and each plot with useful space consisted of three rows of four meters length, spaced at 0.45 meters. Field evaluations were the final stand, the height of the plants, height of the first pod insertion, the mass of 100 seeds and productivity. Already in the lab seeds were evaluated for germination and vigor (first germination count, emergency, emergence speed index, length and dry mass of the aerial part of the plant and roots, electrical conductivity, accelerated aging and tetrazolium test). It concludes that it is possible to use Orthic Quartzarenic Neosoils, located in the Cerrado region at altitudes higher than 600 m, in years and places with good water distribution in the spring-summer seasons, for grain and soybeans production, but as a first goal, the crop should be sown in the first 20 days of November otherwise it should take place in early December.

scholarly journals ELECTRICAL CONDUCTIVITY AND QUALITY OF DIFFERENT UMBEL ORDER CARROT SEEDS

2020 ◽  
Vol 9 (04) ◽  
pp. 75-81
Author(s):  
Luana de Souza Marinke ◽  
Hugo César Rodrigues Moreira Catão ◽  
Gabrielly Fernanda Francisco ◽  
Ítala Menegon Castilho ◽  
Letícia Rodrigues de Oliveira ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Germination Rate ◽  
Statistical Design ◽  
Germination Test ◽  
Aerial Portion ◽  
Initial Characterization ◽  
Different Temperatures ◽  
Physiological Quality ◽  
Final Score

Carrot seeds exhibit irregular vigor due to the wide blooming period of the crop. Results from germination tests are insufficient to evaluate the physiological potential. Thus, vigor tests are used in combination with germination tests. The objective of this work was to evaluate the quality of carrot seeds from different umbel order and the electrical conductivity under different temperatures and imbibing periods. Carrot seeds from cultivar Brasilia were used to perform the experiments. Content of water, the first and the final score of the germination test, index of germination rate, and length of roots and of the aerial portion were determined in the initial characterization. The electrical conductivity test was completed with replicates containing 50 seeds, in 25 mL deionized water at 20, 25 and 30oC. Evaluations were performed with 2, 4, 6, 8, 12 and 24 hours of imbibing period. The experiment was accomplished under a completely random statistical design. The quality of carrot seeds varied according to the umbel order. Seeds of secondary umbels showed better physiological quality. The electrical conductivity test is efficient to evaluate the vigor of carrot seeds with 8 hours of imbibing period at 25°C.

scholarly journals Effect of fungal incidence on physiological quality of tobacco seeds used in Brazil

2018 ◽  
Vol 85 (0) ◽  
Author(s):  
Mariane Sayuri Ishizuka ◽  
Maria Heloisa Duarte de Moraes ◽  
Maria Helena Carmignani Pescarin Chamma ◽  
Carlos Eduardo Pulcinelli ◽  
José Otavio Machado Menten
Keyword(s):  
Seed Treatment ◽  
Pathogenic Fungi ◽  
Test Results ◽  
Fusarium Spp ◽  
Germination Test ◽  
Tobacco Seed ◽  
Tobacco Seeds ◽  
Physiological Quality ◽  
Seeds Germination

ABSTRACT: The objectives of the present project were to evaluate the sanity and germination of tobacco seed samples cultivated in Brazil and to identify potential pathogenic fungi to the culture. Thirty-four representatives samples of tobacco seeds were evaluated through germination and sanity test by the blotter-test. On the germination test, results were expressed in percentage of seedlings considered normal, abnormal and non-germinated seeds. The percentage of seeds germination varied between 54.5 and 90%. According to sanity test, it was verified the incidence of Alternaria alternata, Cladosporium spp., Fusarium spp., and Phoma spp. The incidence of A. alternata varied from 3 to 67%, and Fusarium spp. varied from 0 to 19%. There was significative positive correlation between the incidence of A. alternata and the percentage of seed germination. Species of Alternaria and Fusarium can be potential pathogens to tobacco culture and an alarm for the necessity of seed treatment of the seeds that are transporting these fungi.

Patents for the Physiological Quality in Seeds of Peach Rootstock Classified by Weight and Stored for Different Periods

2019 ◽  
Vol 10 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Aline G. Souza ◽  
Oscar J. Smiderle ◽  
Renata D. Menegatti ◽  
Marcos Aurélio C. de Lima ◽  
Tainá R. das Neves ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Experimental Design ◽  
Growth Analysis ◽  
Prunus Persica ◽  
Stone Fruit ◽  
Germination Test ◽  
Experimental Conditions ◽  
Physiological Quality

Background: Among stone fruit, the peach (Prunus persica (L) Batsch) is one of the most widely grown species in Brazil, in both area cultivated and in production. Objective: The aim of this study was to evaluate the physiological quality of heavy and light seeds of four cultivars of Prunus persica for two storage periods, from tests of electrical conductivity, germination, and an analysis of initial plantlets growth. Methods: The Electrical Conductivity test (EC) was conducted in a Completely Randomised Design (CRD), in a 4 x 2 x 5 factorial scheme with five replications. The germination test was carried out in CRD, in a 4 x 2 factorial scheme with eight replications. The physiological quality of the seeds was determined at zero and twelve month’s storage. For the growth analysis, the experimental design was in CRD, in a 4 x 2 factorial scheme with four replications. Results: Under the conditions of the present study, it was found that the tests of germination and electrical conductivity were complementary in evaluating physiological quality in seeds of Prunus persica rootstock, suggesting that independent of the weight of the seeds, in ‘Capdeboscq’, ‘Aldrighi’, ‘Okinawa’ and ‘Okinawa Roxo’, there is a loss of quality and viability when the seeds are stored for a period of 12 months. Conclusion: Under the experimental conditions of the present study, it was concluded that storage for a period of 12 months in Recent patents is not rather recommendable for maintaining quality and viability in seeds of Prunus persica of the Capdeboscq, Aldrighi, Okinawa and Okinawa Roxo cultivars.

scholarly journals Cryopreservation of primed tobacco seeds

2018 ◽  
Vol 40 (4) ◽  
pp. 415-421
Author(s):  
Camila Aparecida Lopes ◽  
Maria Laene Moreira de Carvalho ◽  
Ana Cristina de Souza ◽  
João Almir Oliveira ◽  
Dayliane Bernardes de Andrade
Keyword(s):  
Seed Germination ◽  
Ambient Temperature ◽  
Silica Gel ◽  
Saline Solution ◽  
Seed Priming ◽  
Potassium Nitrate ◽  
Water Bath ◽  
Tobacco Seeds ◽  
Physiological Quality

Abstract: Priming is a commercial technique used to increase the speed and uniformity of seed germination. However, the physiological quality of primed seeds is usually negatively affected during storage. Tobacco seeds of the cultivar BAT 2101 were used to investigate whether primed seeds could be cryopreserved. The most suitable substances, type of drying, and reheating during priming and cryopreservation of tobacco seeds were studied. Seed priming was performed with water, spermidine, and potassium nitrate, and drying was carried out with silica gel and a saturated saline solution. Seeds were cryopreserved in liquid nitrogen for 24 h and reheated in a water bath for two and five minutes and at ambient temperature. Tobacco seeds primed with spermidine and water can be cryopreserved without loss of physiological quality when quickly dried on silica gel and reheated in a water bath for two minutes.

scholarly journals Drying and storage of Eugenia involucrata DC. seeds

2003 ◽  
Vol 60 (3) ◽  
pp. 471-475 ◽  
Author(s):  
Angela Maria Maluf ◽  
Denise Augusta Camargo Bilia ◽  
Claudio José Barbedo
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Cold Storage ◽  
Native Species ◽  
Plastic Bags ◽  
Physiological Quality ◽  
Drying Rates ◽  
And Storage ◽  
Water Contents

The physiological quality of seeds of native species is important to produce healthy saplings and therefore guarantee the success of programs to recover disturbed vegetation. This reinforces the necessity for investigating the physiological quality of those seeds. To evaluate the effects of different drying rates on the germination, moisture content and storability of Eugenia involucrata diaspores, mature fruits collected at Mogi Guaçu, SP, Brazil had their epi- and mesocarps removed by washing and were dried at 30, 40 or 50ºC until their water content was reduced from 57% (fresh diaspores) to 13% (final drying), totaling six drying levels. In a second experiment, diaspores had their moisture content reduced from 57% to 49%, at 30ºC, totaling six drying levels (0h, 1h, 2h, 3h, 4h and 5h), and were kept for 180 days in plastic bags under cold storage. The drying rate had no effect on tolerance to desiccation by E. involucrata diaspores; water contents lower than 51% decreased both germinability and storability. Diaspores can be stored for up to 180 days as long as their water content is reduced to 53% and they are kept inside plastic bags under cold storage.

scholarly journals Evaluation of the physiological quality of anadenenthera peregrina (L.) Speg. seeds during storage

2009 ◽  
Vol 33 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Daniel Santos Pinho ◽  
Eduardo Euclydes de Lima e Borges ◽  
Viviana Borges Corte ◽  
Luiz Carlos Bhering Nasser
Keyword(s):  
Electrical Conductivity ◽  
Storage Temperature ◽  
Storage Period ◽  
Seed Priming ◽  
Seed Moisture ◽  
Physiological Quality ◽  
Viable Seeds ◽  
Cold Chamber ◽  
Constant Percentage

The aim of this experiment was to evaluate the effect of storage temperature on the viability and vigour of A. peregrina seeds. Seeds of A. peregrina harvested in Viçosa-MG, in September 2005 were used. The seeds were stored in the Laboratory of Forest Seeds Analysis (LASF) of the Universidade Federal de Viçosa (UFV), in a cold chamber, under approximately 5ºC over150 days. The seeds were stored under 20ºC for 150 days more. Seed moisture was determined after oven-drying at 105 ± 3ºC for 24 hours. The seeds were analyzed monthly using germination, tetrazolium and electrical conductivity tests and Osmopriming during 300 days, with four repetitions of 25 seeds. A. peregrina seeds kept a constant percentage of germination and viable seeds under the tetrazolium test for five months of storage, under either 5ºC and 20ºC. The electrical conductivity test showed significant differences in relation to the storage period, proving to be more sensitive than the standard germination test. Seed priming in PEG -0,4 MPa solution was not efficient in recovering the viability and vigor of the stored seeds at 5ºC and 20ºC.

scholarly journals Methodology of the tetrazolium test for assessing the viability of seeds of Eugenia brasiliensis Lam., Eugenia uniflora L. and Eugenia pyriformis Cambess

2014 ◽  
Vol 36 (4) ◽  
pp. 427-434 ◽  
Author(s):  
Edmir Vicente Lamarca ◽  
Claudio José Barbedo
Keyword(s):  
Electrical Conductivity ◽  
Seed Viability ◽  
Important Method ◽  
Eugenia Uniflora ◽  
Fruit Species ◽  
Incubation Periods ◽  
Physiological Quality ◽  
Different Levels ◽  
Tetrazolium Test

Eugenia brasiliensis Lam. ("grumixameira"), Eugenia uniflora L. ("pitangueira") and Eugenia pyriformis Cambess. ("uvaieira") are forest and fruit species of pharmacological and gastronomic potential and have desiccation-sensitive seeds. The development of quick viability tests for the assessment of physiological quality of these seeds is needed. The tetrazolium test is an important method providing fast assessment of the seed physiological quality. Thus, this work aimed to develop a method for the tetrazolium test for determining viability of "grumixameira," "pitangueira" and "uvaieira" seeds. Initially the seeds of these species were soaked in water for 3 h at 25 ºC. Three concentrations of tetrazolium solutions were analyzed (0.100 %, 0.125 % and 0.250 %) for seed staining using three incubation periods (2, 3 and 6 h) at 35 ºC in the dark. After staining, seed viability was determined. Then, the seeds were subjected to different levels of controlled drying and were analyzed for their physiological quality by germination and electrical conductivity tests. The tetrazolium test is a suitable tool for determining viability after staining the seeds at 35 ºC using a 0.250 % concentration solution for 3 hours for "grumixameira" seeds, 0.125 % for 3 hours for "pitangueira" seeds and 0.100 % for 2 hours for "uvaieira" seeds.

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