SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Oliveira,Glauter Lima; Dias,Luiz Antônio dos Santos; Dias,Denise Cunha Fernandes dos Santos; Soares,Marcos Morais; Silva,Laércio Junio da.

There is currently great interest in the cultivation of the Jatropha curcas L., known locally as physic nut, for the production of biodiesel, leading to an increase in the demand for seeds and precise information as to their physiological quality, especially vigour. The objective was to evaluate the efficiency of the accelerated ageing test, with variations, in verifying the vigour of Jatropha seeds. Four seed lots were initially characterized as to their physiological quality by germination and vigour tests. For accelerated ageing test, temperatures of 42 and 45 ºC were tested during 48, 72 and 96 hours. The experiment was carried out in a completely randomized design and the averages of the treatments compared by Tukey test (p<0,05). The Pearson...

ACCELERATED AGING AND ELECTRICAL CONDUCTIVITY TESTS IN CRAMBE SEEDS

Palavras-chave: Physiological quality; Germination; Physic nut.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100015

Ciência e Agrotecnologia

Lima,Juliana Joice Pereira; Freitas,Marcella Nunes de; Guimarães,Renato Mendes; Vieira,Antônio Rodrigues; Ávila,Maria Alice Bento.

The aim of this study was to adapt the methodology of the accelerated aging and electrical conductivity tests for determination of physiological potential in crambe seeds. Six seed lots of crambe (cv. FMS Brilhante) were subjected to determination of moisture content, germination test, first count germination, emergence, and emergence speed index. For the accelerated aging test, the traditional methodology was used with water, and with a saturated potassium chloride and sodium chloride solution in three periods of exposure (24, 48, and 72 hours) at 41°C; the electrical conductivity test was performed with four pre-soaking treatments (0, 2, 4, and 8 hours) and four soaking periods (4, 8, 16, and 24 hours) at 25°C. The accelerated aging test with water for...

Accelerated aging of melon seeds

Palavras-chave: Crambe abyssinica; Vigor; Physiological quality.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000100007

Scientia Agricola

Torres,Salvador Barros; Marcos Filho,Julio.

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...

Adjustment methodology of the tetrazolium test for viability evaluation of angico seeds

Palavras-chave: Cucumis melo; Physiological quality; Vigor.

Ano: 2003

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100012

PFB - Pesquisa Florestal Brasileira

Pinho, Daniel Santos; Borges, Eduardo Euclydes de Lima; Carvalho, Ana Paula Vilela; Corte, Viviana Borges.

Este trabalho teve por objetivo adequar a metodologia do teste em sementes de Anadenanthera peregrina (L.) Speg. As sementes foram pré-condicionadas por imersão em água destilada a 25 ºC por 14 horas. O tegumento foi retirado e os embriões submersos em solução de tetrazólio (pH 6,5) nas concentrações de 0,1%; 0,05% e 0,01%, sendo mantidos no escuro a 25 ºC por três e cinco horas e a 30 ºC por 24 horas. Avaliaram-se a intensidade e localização da coloração, presença de áreas leitosas e aspecto dos tecidos. Os embriões foram classificados em nove classes de viabilidade. O melhor tratamento como substituto do teste padrão de germinação foi a concentração de 0,1% e a incubação a 30 ºC por 24 horas. Sementes viáveis de A. peregrina foram classificadas nas...

Adzuki beans (Vigna angularis) seed quality under several drying conditions

Palavras-chave: Physiological quality; Germination; Anadenanthera peregrina Qualidade; Fisiológica Germinação; Anadenanthera peregrina.

Ano: 2011

URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/197

Ciênc. Tecnol. Aliment.

Resende,Osvaldo; Almeida,Dieimisson Paulo; Costa,Lílian Moreira; Mendes,Udenys Cabral; Sales,Juliana de Fátima.

This study analyzed the drying process and the seed quality of adzuki beans (Vigna angularis). Grains of adzuki beans, with moisture content of 1.14 (decimal dry basis) at harvest and dried until the moisture content of 0.11 (decimal dry basis.) were used. Drying was done in an experimental drier maintened at controlled temperatures of 30, 40, 50, 60, and 70 ºC and relative humidity of 52.0, 28.0, 19.1, 13.1, and 6.8%, respectively. Physiological and technological seed quality was evaluated using the germination test, Index of Germination Velocity (IGV), electrical conductivity, and water absorption, respectively. Under the conditions tested in the present study, it can be concluded that drying time for adzuki beans decreases with the higher air...

Agrochemicals and storage times on soybean seed vigor.

Palavras-chave: Physiological quality; Drying conditions; Technological quality; Seed drying.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000100022

BORTOLETTO, W. V.; MACEDO, W. R.; OLIVEIRA, T. C. de; SOUZA, D. S..

The objective of this work was to investigate the potential physiological damage of the treatment of '97Y07RR' soybean seeds with different pesticides at different storage times, in order to define the optimal period of sowing. The germination rate, the germination speed index, and shoot fresh matter were evaluated. Thiamethoxam did not cause losses in seed vigor with increasing storage time; however, the other agrochemicals caused significant losses. Seed treatment should be performed up to 90 days before sowing.

Agrochemicals and storage times on soybean seed vigor

Palavras-chave: Germination speed index; Physiological quality; Índice de velocidade de germinação; Qualidade fisiológica; Glycine max; Germinação; Tratamento de semente; Glycine max; Germination; Seed treatment.

Ano: 2017

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1068063

PAB

Bortoletto,Wilian Vinicius; Macedo,Willian Rodrigues; Oliveira,Thalyta Coelho de; Souza,Daniela Silva.

Abstract: The objective of this work was to investigate the potential physiological damage of the treatment of '97Y07RR' soybean seeds with different pesticides at different storage times, in order to define the optimal period of sowing. The germination rate, the germination speed index, and shoot fresh matter were evaluated. Thiamethoxam did not cause losses in seed vigor with increasing storage time; however, the other agrochemicals caused significant losses. Seed treatment should be performed up to 90 days before sowing.

Avaliacao do potencial fisiologico de sementes de tomate pelo teste de estresse hidrico.

Palavras-chave: Glycine max; Germination; Germination speed index; Physiological quality; Seed treatment..

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000200129

TORRES, S. B..

Com o objetivo de estudar a eficiencia do teste de estresse hidrico na avaliacao da qualidade fisiologica de sementes de tomate industrial (Lycopersicon esculentum Mill), cinco lotes da cultivar IPA-5 foram analisados pelos testes de germinacao, primeira contagem, de frio sem solo, envelhecimento acelerado, condutividade eletrica, emergencia em campo e comprimento das plantulas sob estresse hidrico nos potenciais de 0, -0,2, -0,4 e -0,6 MPa. Os trabalhos foram realizados no laboratorio de analise de sementes e no campo experimental do CPATSA, em Petrolina, PE. As determinacoes foram conduzidas com quatro repeticoes, em delineamento experimental inteiramente casualizado. Os resultados indicam que o teste de germinacao sob estresse hidrico de -0,4 MPa pode...

Biochemical and physiological analysis in carrot seeds from different orders of umbels

Palavras-chave: Lycopersicon esculentum; Polietileno glicol; Teste de vigor; Semente; Qualidade fisiologica; Poliethylene glycol; Vigor test; Seeds; Physiological quality.

Ano: 1998

URL: http://www.alice.cnptia.embrapa.br/handle/doc/86522

Silva,Patrícia Pereira da; Sekita,Marcelo Coelho; Dias,Denise Cunha Fernandes dos Santos; Nascimento,Warley Marcos.

ABSTRACT In carrot seed production, harvesting of the umbels is generally staggered, or sometimes the whole plant is harvested with the umbels at different stages of maturation; in that case, there is a risk of harvesting immature seeds and of losses due to natural dehiscent, or to physiological deterioration as a result of unfavourable environmental factors. The present study aimed to evaluate the physiological and biochemical changes related to the maturation of 'Planalto' carrot seeds from diferent umbels. The samples were collected 120 days after anthesis, with the primary, secondary and tertiary umbels being harvested separately. Seeds were analysed for germination, first count and germination rate, at temperatures of 25 ºC (optimum) to 35 ºC...

Carrot seed germination and vigor in response to temperature and umbel orders

Palavras-chave: Daucus carota L.; Physiological quality; Enzyme activity.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200407

Scientia Agricola

Pereira,Roseane Sousa; Nascimento,Warley Marcos; Vieira,Jairo Vidal.

Several factors may influence carrot (Daucus carota L.) crop establishment. High temperatures (35 - 40°C), for instance, may delay or inhibit carrot seed germination in the field and so compromise the stand establishment. Carrot seeds from superior umbel orders usually have better physiological quality than those of lower umbel orders. These seeds from superior umbel orders may also show a better performance in adverse conditions. In addition, seeds from different ages show differences in vigor, which affect the stand establishment, mainly under adverse conditions. The aim of this study was to verify the germination at high temperatures and the carrot seed vigor of different umbel orders of 'Brasília', as well as the different 'Alvorada' seed lots....

Chronological analysis of the physiological quality of diaspores of Myracrodruon urundeuva Fr. All. in semiarid regions

Palavras-chave: Daucus carota L.; Thermo-inhibition; Physiological quality.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000200006

Agronomy

Azevedo, Aderdilania Iane Barbosa de; Silva, Givanildo Zildo da; Bruno, Riselane de Lucena Alcântara; Andrade, Alberício Pereira de; Cruz, José de Oliveira.

The objective of this study was to evaluate the physiological quality of diaspores from Myracrodruon urundeuva mother trees developing in the Cariri region of the state of Paraíba, Brazil. The seeds were collected during three consecutive years and from different areas of the Cariri region. The seed collection areas comprised two sites in the municipality of Boa Vista and one in the municipality of São João do Cariri. The diaspores had their water content determined and were submitted to the following tests: germination, seedling emergence, first count of germination and seedling emergence (within 5 days), and speed of germination and seedling emergence. The treatment means were compared using the deviance statistic. The collection years and collection...

Chronological analysis of the physiological quality of diaspores of Myracrodruon urundeuva Fr. All. in semiarid regions

Palavras-chave: Produção e beneficiamento de sementes 5.01.00.00-9; 5.01.03.00-8 aroeira; Physiological quality; Seeds; Caatinga. Produção e beneficiamento de sementes.

Ano: 2018

URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39423

Agronomy

Azevedo, Aderdilania Iane Barbosa de; Silva, Givanildo Zildo da; Bruno, Riselane de Lucena Alcântara; Andrade, Alberício Pereira de; Cruz, José de Oliveira.

Classification of West Indian gherkin seeds vigor by respiratory activity

Palavras-chave: Aroeira; Physiological quality; Seeds; Caatinga.; Produção e beneficiamento de sementes; Produção e beneficiamento de sementes.

Ano: 2018

URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39423

Leite,Moadir de Sousa; Leite,Tiago de Sousa; Torres,Salvador Barros; Leal,Caio César Pereira; Freitas,Rômulo Magno Oliveira de.

ABSTRACT Seed companies increasingly need to obtain rapid and reliable results on seed quality. In this context, this study aimed at verifying the efficiency of CO2 measurement for classifying West Indian gherkin (Cucumis anguria L.) seed vigor, using three seed lots of cv. “Do Norte” and three of cv. “Nordestino”. In order to assess seed physiological quality, the following tests were performed: germination, seedling emergence, emergence speed index, shoot length, total dry matter, electrical conductivity and respiratory activity. The experimental design was completely randomized, with four replicates, and the means were compared by Tukey test at 5% probability level. Pearson’s simple correlation was performed between the traditional vigor tests and the...

Crambe fruit drying with natural air in stationary dryers

Palavras-chave: Cucumis anguria L.; CO2 measurement; Physiological quality.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200307

Cardoso Neto,Sebastião Rodrigues; Resende,Osvaldo; Costa,Lilian Moreira; Oliveira,Daniel Emanuel Cabral de.

ABSTRACT The aim of this study was to assess the drying behavior and quality of crambe fruit seeds dried with natural air and submitted to different airflows in stationary dryers. Dryings were carried out in July and September 2014. The experiment consisted of three treatments of drying the crambe fruits with natural air in stationary dryers with airflows of 10.08, 15.05, and 25.03 m3 min−1 t−1 and a control treatment composed of crambe fruits with an initial moisture content without going through the drying process. After drying, tests of moisture content, germination, germination rate index, and electrical conductivity were performed in order to compare the treatments. The data were submitted to analysis of variance and mean comparison by the Tukey's...

Cryopreservation in Coffea canephora Pierre seeds: slow and fast cooling.

Palavras-chave: Moisture content; Physiological quality; Biodiesel.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400592

COELHO, S. V. B.; ROSA, S. D. V. F. da; FANTAZZINI, T. B.; BAUTE, J. L.; SILVA, L. C..

Coffee is one of the main agricultural commodities in the country, and it is important to conservation of plant material for breeding programs. Cryopreservation is a promising alternative for preserving in the long-term the germplasm of species considered recalcitrant. However, studies should be performed to achieve maximum survival of seedlings after immersion in liquid nitrogen. The objective of this work was to find a cryopreservation protocol for storing seeds of Coffea canephora, studying two methods of cryopreservation, slow and fast cooling. Seeds were subjected to drying in silica gel up to the water content of 0.25 g g-1. In the first experiment, dried seeds were subjected to treatments of slow cooling at speeds of -1 ºC min-1,-3 ºC min-1 and -5...

Cryopreservation in Coffea canephora Pierre seeds: Slow and fast cooling

Palavras-chave: Drying in silica gel; Ice crystals; Isoenzymes; Physiological quality; Secagem em sílica gel; Semente recalcitrante; Cristal de gelo; Qualidade fisiológica; Secagem; Isoenzima; Recalcitrant seeds.

Ano: 2018

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1108759

Ciência e Agrotecnologia

Coelho,Stefânia Vilas Boas; Rosa,Sttela Dellyzete Veiga Franco da; Fantazzini,Tatiana Botelho; Baute,Júlia Lima; Silva,Luciano Coutinho.

ABSTRACT Coffee is one of the main agricultural commodities in the country, and it is important to conservation of plant material for breeding programs. Cryopreservation is a promising alternative for preserving in the long-term the germplasm of species considered recalcitrant. However, studies should be performed to achieve maximum survival of seedlings after immersion in liquid nitrogen. The objective of this work was to find a cryopreservation protocol for storing seeds of Coffea canephora, studying two methods of cryopreservation, slow and fast cooling. Seeds were subjected to drying in silica gel up to the water content of 0.25 g g-1. In the first experiment, dried seeds were subjected to treatments of slow cooling at speeds of -1 ºC min-1,-3 ºC min-1...

Cryopreservation of Coffea canephora Pierre ex A. Froehner seeds: importance of drying rate and moisture content.

Palavras-chave: Drying in silica gel; Recalcitrant seeds; Ice crystals; Isoenzymes; Physiological quality.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000600588

COELHO, S. V. B.; ROSA, S. D. V. F. da; FANTAZZINI, T. B.; SILVA, L. C..

Seeds of the Coffea canephora species are considered more recalcitrant than those of the Coffea arabica species. They tolerate partial dehydration and they cannot be stored in conventional seed banks at -18ºC because they are sensitive to freezing temperatures. Cryopreservation is a reliable method for storing seeds with these characteristics for long periods. However, preliminary studies are necessary to determine ideal storage conditions. The aim of this study was to investigate the ideal physical and physiological conditions for cryopreservation of Coffea canephora seeds to reduce seed mortality caused by the formation of intracellular ice crystals and to avoid cell damage caused by excessive desiccation. Seeds were subjected to rapid drying in silica...

Desication sensitivity from different coffee seed phenological stages.

Palavras-chave: Antioxidant enzymes; Drying in silica gel; Ice crystals; Physiological quality; Rapid drying; Recalcitrant seeds.

Ano: 2019

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114203

SANTOS, F. C.; ROSA, S. D. V. F. da; VON PINHO, E. V. de R.; CIRILLO, M. A.; CLEMENTE, A. da C. S..

Maturity stage and drying method are the factors that most influence coffee seed quality. The objective of this study was to assess the physiological quality and investigate the electrophoretic patterns of catalase and endo-ß-mannanaseenzymes and heat resistant proteins in coffee seeds harvested at different phenological stages and dried under different conditions. Physiological quality was assessed when the seeds had developed the green, greenish-yellow, cherry, overripe and dry stages after three treatments: no drying, conventional drying and fast drying. After each treatment, the physiological quality of the seeds was assessed using the germination test and electrophoretic patterns of heat resistant proteins and the activity of catalase and...

Development of methodology to test the electrical conductivity of Marandú grass seeds

Palavras-chave: Seed drying; Physiological quality; Protein profile; Qualidade fisiológica; Pefil proteico; Coffea arabica; Secagem; Coffea arabica.

Ano: 2014

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1039773

Melo,Paulo Alexandre Fernandes Rodrigues de; Martins,Cibele Chalita; Alves,Edna Ursulino; Vieira,Roberval Daiton.

ABSTRACT The electrical conductivity test enables the evaluation of seed vigor for a maximum period of 24 hours, but the need to count the seeds to obtain a sample for analysis makes it difficult to apply this test to small seeds, such as forage grasses. The objective of this study was to establish a practical methodology for testing the electrical conductivity of Brachiaria brizantha (Hochst. Ex A. Rich.) Stapf ‘Marandú’ seeds and to estimate its effect on seedling emergence in the field. The water content, germination, first germination count, first emergency count, percentage, and rate of seedling emergence speed in the laboratory, seedling emergence in the field, and electrical conductivity of eight batches of seeds was analyzed. In the last test, the...