scholarly journals Physiological quality of Gossypium hirsutum L. seeds after the thermal delinting process

2018 ◽  
Vol 9 (3) ◽  
pp. 465-474 ◽  
Author(s):  
Pablo Radamés Cabral de França ◽  
Francisco De Assis Cardoso Almeida ◽  
Odilon Reny Ribeiro Ferreira da Silva ◽  
Jeane Ferreira Jerônimo
Keyword(s):  
Gossypium Hirsutum ◽  
Dry Weight ◽  
Dry Mass ◽  
Germination Percentage ◽  
Gossypium Hirsutum L ◽  
Mean Values ◽  
Randomized Design ◽  
Physiological Quality ◽  
Cotton Seeds

The removal of lint from cotton seeds is mainly carried out through chemical delinting, but it is an expensive procedure and requires high technology. The objective was to evaluate the physiological quality of Gossypium hirsutum L. seeds delinted by flaming using a thermal delinter prototype. Cotton seeds BRS 286 were flamed in nine settings intensities and compared to chemical delinting and seeds with lint. We analyzed the water content, germination, first count, germination speed index (GSI), length and dry mass of roots and shoots. Using a completely randomized design and the means were compared by Scott-Knott test at 5% probability. In evaluating, the germination percentage did not differ between treatments with chemical and thermal low intensity delinting compared to the control. In vigor tests were observed higher mean values of the chemical treatment to the other treatments, except in GSI test and root dry weight when subjected to thermal delinting of low and medium intensity. The delinting made through the prototype enables efficient results, as well as the chemical delinting with sulfuric acid, without affecting germination and vigor when flamed with low and middle intensity, regardless of the number of active burners.

scholarly journals Physiological quality of osmoprimed gherkin seeds

2013 ◽  
Vol 35 (3) ◽  
pp. 368-373 ◽  
Author(s):  
Rodrigo de Góes Esperon Reis ◽  
Humberto Pereira da Silva ◽  
José Maria Gomes Neves ◽  
Renato Mendes Guimarães
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Dry Weight ◽  
Potassium Nitrate ◽  
Germination Percentage ◽  
Initial Profile ◽  
Randomized Design ◽  
Physiological Quality ◽  
Osmotic Potentials

It was aimed to verify the effect of different methodologies of osmopriming on physiological quality of gherkin seeds. Prior, it has been characterized the initial profile of the gherkin seeds. Then, the seeds were osmoprimed in gerboxes containing two blotter papers wetted with osmotic solutions in a volume equal to three times the paper dry weight and kept in BOD at 15 °C. After the priming, the seeds were dried at room temperature for 48 hours. Then, the following variables were evaluated: seeds moisture content, percentage of germination, percentage of emergence, emergence speed index and electrical conductivity. The analyses of variances were realized according to a randomized design in a factorial scheme 3 x 2 x 4: three solutes (polyetilene glycol 6000 - PEG, potassium nitrate - KNO3 and PEG + KNO3), two osmotic potentials (-0.55 and -1.10 MPa) and four times of priming (24, 48, 72 and 96 hours), followed by analyses of regression. It is concluded that the priming has no effect on germination and affects positively the vigor of the gherkin seeds lots; osmopriming with potassium nitrate is effective in improving the physiological quality of gherkin seeds lot.

scholarly journals Physiological quality of parsley seeds in function of size

2021 ◽  
Vol 42 (3Supl1) ◽  
pp. 1499-1510
Author(s):  
Renato Téo de Barros ◽  
◽  
Cibele Chalita Martins ◽  
Tatiane Sanches Jeromini ◽  
Givanildo Zildo da Silva ◽  
...  
Keyword(s):  
Seed Size ◽  
Dry Weight ◽  
Germination Percentage ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Germination Vigor ◽  
Selection Of

Parsley seeds are commercialized without classification by size during processing, unlike other crops. This classification procedure allows the standardization of seed size for high precision in sowing, disposal of unwanted material, and selection of high quality seeds. The aim of this study was to verify the effect of seed size on germination, vigor, and yield performance of two parsley cultivars. Seeds from eight lots of parsley of ‘Portuguesa’ and ‘Chacareira’ cultivar were separated into three size classes, represented by the seeds retained in the sieves of 0.84, 1.00 and 1.41mm mesh opening. After classification, seeds were evaluated in the laboratory for water content, germination percentage, first count, and thousand seed weight. In the field, the fresh and dry weight of aerial part and the final number of plants (stand) were evaluated after 78 days of sowing. The experimental design was the completely randomized design in an 8 x 3 factorial scheme (eight lots and three sieve opening) with four replicates, for both cultivars. Data obtained were subjected to analysis of variance and means were compared using Tukey test at 5% probability level. It was concluded that the parsley seeds separated by the 1.41 mm sieves showed higher vigor, and consequently, greater success in stand establishment at the field than those separated by other sieve size. The use of sieves in the classification of parsley seeds helps in obtaining lots with superior physiological quality.

scholarly journals Desempenho fisiológico de sementes de algodão cultivadas em Luís Eduardo Magalhães, Bahia

2015 ◽  
Vol 10 (2) ◽  
pp. 69
Author(s):  
R. T. C. Nunes ◽  
T. R. Prado ◽  
E. B. Ribeiro ◽  
W. S. Vale ◽  
O. M. Morais
Keyword(s):  
Electrical Conductivity ◽  
Gossypium Hirsutum ◽  
Seed Quality ◽  
Germination Rate ◽  
Dry Mass ◽  
State University ◽  
Seed Technology ◽  
Physiological Quality ◽  
Cotton Seeds

<p>O presente trabalho foi desenvolvido no laboratório de tecnologia de sementes da Universidade Estadual do Sudoeste da Bahia, Campus de Vitória da Conquista UESB, com objetivo de avaliar a qualidade fisiológica de sementes de algodão (<em>Gossypium hirsutum</em> L.), utilizando-se cinco cultivares (DP 604, FM 993, BRS 368, TMG 642 e DELTA OPAL). As sementes foram submetidas aos seguintes testes: teor de água, peso de mil sementes, germinação, primeira contagem de germinação, índice de velocidade de emergência, emergência, comprimento da parte aérea, massa seca das plântulas e condutividade elétrica. O delineamento experimental utilizado foi o inteiramente casualizado, em quatro repetições de 50 sementes por tratamento. A cultivar TMG 642 demonstrou baixa qualidade fisiológica das sementes, quando comparados com as cultivares DP 604, FM 993, BRS 368, e DELTA OPAL. Os testes de germinação, condutividade elétrica e índice de velocidade de germinação mostraram eficiência na separação de cultivares de sementes de algodão em níveis de vigor. </p><p align="center"><strong><em>Physiological performance of cottonseed grown in Luís Eduardo Magalhães, Bahia</em></strong></p><p><strong>ABSTRACT</strong><strong>: </strong>This study was conducted at the State University of seed technology laboratory of Southwest Bahia, Campus Victory Conquest, UESB, to evaluate the physiological quality of cotton seeds (<em>Gossypium hirsutum</em> L.), using five cultivars (DP 604, FM 993, BRS 368, GMT 642 and DELTA OPAL). Seeds were subjected to the following tests: water content, weight of a thousand seeds, germination, first count, emergence speed index, emergency, shoot length, dry mass of seedlings and electrical conductivity. The experimental design was completely randomized, with four replications of 50 seeds per treatment. The cultivar TMG 642 demonstrated low physiological seed quality when compared with the DP 604 cultivars, FM 993, BRS 368, and DELTA OPAL. Germination tests, electrical conductivity and germination rate index showed efficiency in the separation of cotton seed varieties in force levels.</p>

scholarly journals Physiological maturation of cowpea seeds

2014 ◽  
Vol 36 (3) ◽  
pp. 312-317 ◽  
Author(s):  
Narjara Walessa Nogueira ◽  
Rômulo Magno Oliveira de Freitas ◽  
Salvador Barros Torres ◽  
Caio César Pereira Leal
Keyword(s):  
Dry Mass ◽  
Germination Percentage ◽  
Maturation Process ◽  
Cowpea Seeds ◽  
Randomized Design ◽  
Germination Process ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Nutrient Reserves

The seed maturation process is genetically controlled and involves an arranged sequence of morphological and physiological changes extending from fertilization to its total independence from the mother-plant. These changes also include a set of preparatory phases for the germination process, which are characterized for the synthesis and accumulation of nutrient reserves. Thereby, this study was developed aiming at assessing development and physiological quality of cowpea seeds during maturation process. To this, the cowpea pods of cultivar BRS-Guariba were harvested from the tenth day after anthesis (DAA) until the twenty sixth DAA, with four days intervals. Immediately after each harvest, seeds were manually extracted from the pods and then subjected to the following determinations: moisture content, first count of germination, final germination percentage, length of shoots and roots, hypocotyl diameter, and seedling dry mass. The experiment was conducted in a completely randomized design, with five treatments (DAA), and four replications to each treatment. Results have shown that cowpea seeds have fairly fast physiological maturation, and that seeds harvested between 14 and 18 DAA have better vigor as well as higher germination rates; thus the harvest performed during this period does not cause damages to seeds.

scholarly journals Physiological Quality of Cowpea Beans (Vigna unguiculata L.) Seeds in the Function of Cultivars and Planting Times

2019 ◽  
pp. 1-8
Author(s):  
Joabe Freitas Crispim ◽  
Jailma Suerda Silva de Lima ◽  
Cristiane Wigna dos Santos Rodrigues Fir ◽  
Jacqueline Alves de Medeiros Araújo Cost ◽  
Antônio Gideilson Correia da Silva ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Dry Mass ◽  
Germination Percentage ◽  
Local Effect ◽  
Randomized Design ◽  
Two Factors ◽  
Physiological Quality ◽  
Sowing Season ◽  
Planting Season

Germination and vigour evaluation of improved cultivars and creole of cowpea bean seeds as a function of different planting seasons. A completely randomized design in a factorial scheme, with six treatments and two planting periods, with four replications, each repetition with 25 seeds. The treatments consisted of six cowpea bean (Vigna unguiculata L.) cultivars, and two improved (BRS Tumucumaque, BRS Guariba) and four creoles, (Governor, Passagem, Chico Joaquim and Espírito Santo). The experiment place and timing was carried out under greenhouse on a riparian zone of the Federal Rural Semi-Arid University (UFERSA), located in the municipality of Mossoró-RN, Brazil. The first sowing season comprised the period from April 3 to April 18, 2017, and the second one from January 15 to 30, 2018. The sowing was done in plastic trays. Was used the sand washed and sterilized as a substrate. The trays were kept in a greenhouse at room temperature. Two irrigations were realized daily. In order to avoid the local effect, the trays were changed position each day. The evaluated characteristics were: Germination percentage, emergence speed index, seedling height, leaf number, root length, stem diameter, fresh and dry mass of seedlings. Creole cultivars showed superior quality to those improved in the second season. In the first season, the cultivars BRS Guariba and BRS Tumucumaque were the most outstanding. It was concluded that the physiological quality of cowpea beans is directly influenced by the cultivars and the planting season, as well as by the interaction of these two factors.

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 Application of Trichoderma harzianum on the physiological quality of cowpea seeds

2021 ◽  
pp. 643-648
Author(s):  
Marcelo Laranjeira Pimentel ◽  
Henara Valéria Miranda Castro ◽  
Mike Kirixi Munduruku ◽  
Larissa Conceição Cunha Ponte ◽  
Deyvielen Maria Ramos Alves ◽  
...  
Keyword(s):  
Trichoderma Harzianum ◽  
Seed Treatment ◽  
Germination Percentage ◽  
Hypocotyl Length ◽  
Cowpea Seeds ◽  
Randomized Design ◽  
Germination Speed ◽  
Physiological Quality ◽  
Set Up

The use of fungi in seed treatment can improve the plant's physiological characteristics. The aim of this study was to evaluate the influence of the use of Trichoderma harzianum on the physiological quality of bean seeds. The experiment was set up and conducted in the forest seed laboratory of the Federal University of Western Para, in a randomized design, using 4 procedures on the basis of a colony forming unit (CFU): T1 (0 CFU), T2 (4 x 109 CFU), T3 (8 x 109 CFU) and T4 (12 x 109 CFU), with 5 repetitions. Germination percentage (G%), germination speed index (GSI), hypocotyl length (HL) and radicle length (RL) were evaluated as variables. The data were analyzed by variance analysis and the averages were compared using the Tukey test (p≤0.05), in addition to the regression analysis, using the Minitab© version 18 statistical software. There were differences between the germination percentage tests, in which T2 obtained 100% of germinated seeds, for GSI it was observed that T2 and T3 were equal and superior to the other treatments, while for RL T1 and T2 obtained the best results, however, for HL there were no statistical differences between treatments. T2 was more efficient in the physiological quality of seeds to germination percentage and germination speed index

scholarly journals Temperatures and substrates for germination and vigor of Erythroxylum pauferrense Plowman seeds

2019 ◽  
Vol 41 ◽  
pp. e46030
Author(s):  
João Everthon da Silva Ribeiro ◽  
Arliston Pereira Leite ◽  
Jackson Silva Nóbrega ◽  
Edna Ursulino Alves ◽  
Riselane de Lucena Alcântara Bruno ◽  
...  
Keyword(s):  
Dry Mass ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Randomized Design ◽  
Temperature Regimes ◽  
Seedling Length ◽  
Physiological Quality ◽  
Mean Germination Time ◽  
Completely Randomized Design ◽  
Understory Plant

Erythroxylum pauferrense is an endemic understory plant species of the Northeast Region of Brazil. The species is of great importance to the region and so ecophysiological studies are needed for its preservation. The objective of the present study was to determine the best substrates and temperatures for testing germination and seed vigor of E. pauferrense. An experiment was performed comprising a completely randomized design in a 5 x 4 factorial scheme, with five temperature regimes (20, 25, 30, 35°C constant and 20-30°C alternating) and four types of substrates (paper, vermiculite, sand and commercial substrate). The following characteristics were evaluated: germination percentage, first germination count, germination speed index, mean germination time, seedling length and dry mass (root and shoot). Paper and vermiculite substrates combined with constant temperatures of 20, 25, 30 and alternated between 20-30°C, provide greater seed germination and vigor while 35°C reduces seed physiological quality.

scholarly journals PHYSIOLOGICAL QUALITY OF Brachiaria brizantha SEEDS TREATED WITH FUNGICIDE AND INSECTICIDE

2018 ◽  
Vol 31 (3) ◽  
pp. 651-656
Author(s):  
ERIC FABIANO SERAGUZI ◽  
CARLOS HENRIQUE QUEIROZ REGO ◽  
FERNANDA BRITO CARDOSO ◽  
ANA CARINA DA SILVA CÂNDIDO ◽  
CHARLINE ZARATIN ALVES
Keyword(s):  
Root Development ◽  
Dry Mass ◽  
Brachiaria Brizantha ◽  
Thiophanate Methyl ◽  
Physiological Characterization ◽  
Randomized Design ◽  
Phytotoxic Effect ◽  
Physiological Quality ◽  
Completely Randomized Design

ABSTRACT This study aimed to evaluate the effects of chemical treatment of seeds with fungicide and insecticide on the seed physiological quality of Brachiaria brizantha cultivar MG5. Two experiments with four replicates were carried out in a completely randomized design. In the first experiment, the seeds were treated with the fungicide pyraclostrobin + fipronil + thiophanate-methyl and in the second, with the insecticide thiamethoxam, both at doses of 0, 150, 300, 450, and 600 mL of commercial product (CP)/100 kg of seeds. Physiological characterization was done on the basis of the first germination count, germination (%), emergence (%), emergence speed index, and length and dry mass of shoot and root. The treatment of B. brizantha seeds with the fungicide pyraclostrobin + fipronil + thiophanate-methyl benefits the physiological quality of seeds, improving germination and root development, with no phytotoxic effect up to the dose of 600 mL of CP/100 kg of seeds. The insecticide thiamethoxam has a biostimulating effect on B. brizantha cultivar MG5 up to the dose of 270 mL of CP/100 kg of seeds, but is phytotoxic in larger doses.

scholarly journals Vigor tests in seeds creole of Phaseolus lunatus L.

2019 ◽  
Vol 35 (5) ◽  
Author(s):  
Maria das Graças Rodrigues do Nascimento ◽  
Maria Lúcia Maurício da Silva ◽  
Edna Ursulino Alves ◽  
Caroline Marques Rodrigues ◽  
Maria Joelma da Silva
Keyword(s):  
Electrical Conductivity ◽  
Water Content ◽  
Dry Mass ◽  
Phaseolus Lunatus ◽  
High Productivity ◽  
Randomized Design ◽  
Seed Analysis ◽  
Seedling Length ◽  
Physiological Quality

Seeds with a good physiological quality are essential to high productivity. However, for some seeds, Phaseolus lunatus L., the viability and vigor analyze show deficiency in quality. This work aimed to evaluate the physiological quality of Phaseolus lunatus L. seeds using several vigor tests. The study was realized at the Laboratory of Seed Analysis of the Agricultural Sciences Center of the Federal University of Paraíba, in Areia – PB, Brazil. We used seeds from five cultivars of P. lunatus (Branca, Orelha de Vó, Cearense, Rosinha, and Roxinha). To determine the physiological quality, we measured the water content, the viability and vigor test (germination, emergence, electrical conductivity, tetrazolium, first germination count and emergence, seedling length and dry mass). We used a completely randomized design for seeds evaluation, and the field test was performed in randomized blocks. The water content of P. lunatus did not differ among the cultivars, indicating a uniformity in the percentage of moisture. Also, the percentage and speed of emergency and the dry mass of seedlings did not differ among the varieties. The tetrazolium and electrical conductivity tests indicated that Rosinha cultivar had the worst viability concerning the other cultivars, showing a low percentage of living tissue and lower electrical conductivity. The seeds of Roxinha cultivar had the better physiological quality, and the Cearense cultivar had the worst quality evaluation. We recommend the tetrazolium test but not the electrical conductivity test to evaluate the vigor of P. lunatus.

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