Condutividade elétrica em sementes de abóbora, híbrido Bárbara

Vieira, Roberval Daiton; Dutra, Alek Sandro

doi:10.1590/s0102-05362006000300007

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…According to Panobianco et al (2007), the integrity of cell membranes varies according to the degree of deteriorative biochemical or physical damage that may be considered as a fundamental cause of changes in the level of seed vigor, which may be directly evaluated considering the EC measurements in the soaked seed solution. Similar results were obtained by Vieira and Dutra (2006) for squash, Almeida et al (2010) for watermelon and Abdo et al (2005) for cucumber. In agreement with these authors, the EC test has potential to be used as a vigor indicator for the abovementioned species.…”

Section: Physiological Quality Of Four Untreated Watermelon Seed Lotssupporting

confidence: 85%

Influence of fungi associated with watermelon seeds on physiological and health quality

Soares¹,

Rodrigues²,

Gadotti³

et al. 2016

Aust J Crop Sci

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Crop cultivation begins with direct sowing or seedlings production; it is important to use high quality seeds, highlighting physiological and health attributes. This study aimed to evaluate the physiological and health quality of watermelon seeds using different methodologies. We used four lots of untreated watermelon seeds of Crimson Sweet plant variety produced in the same year. Physiological performance was evaluated by a standard germination test, first count of germination, accelerated aging, electrical conductivity of seeds (Ec) and seedling emergence (S). Health quality was evaluated by a blotter method test where seeds were planted on well water-soaked blotters (filter papers), and incubated for seven days at 22ºC under 12h alternating cycles of light and darkness; seedling symptom in paper roll test where seeds were planted such as a standard germination test, and incubated for seven days at 22ºC under 12h alternating cycles of light and darkness; seedling symptom in autoclaved sand carried out with the seedlings' emergence. First count of germination and electrical conductivity of seeds showed the lower quality of lots 1 and 2 in relation to the other lots, which were evaluated as similar in seedlings' emergence. Identification of seedlings' symptoms in paper roll and sand was not sensitive enough to quantify Aspergillus sp., Penicillium sp. and Rhizopus sp. presence in watermelon seeds. Electrical conductivity and first count of germination tests allow the evaluation of physiological performance of watermelon seeds properly, based on the correlation value (+/-1). The blotter test is the most efficient test to evaluate health quality of watermelon seeds. Aspergillus sp. incidence is correlated with low physiological performance of watermelon seeds.

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Section: Physiological Quality Of Four Untreated Watermelon Seed Lotssupporting

confidence: 85%

Influence of fungi associated with watermelon seeds on physiological and health quality

Soares¹,

Rodrigues²,

Gadotti³

et al. 2016

Aust J Crop Sci

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“…No Brasil, é utilizado como teste de vigor com resultados promissores, principalmente para sementes de amendoim (Vanzolini e Nakagawa, 2005), soja (Dias e MarcosFilho, 1996), feijão caupi (Dutra et al, 2006) e algumas olerícolas como feijão-de-vagem e quiabo (Dias et al, 1998), abóbora (Vieira e Dutra, 2006) e pimentão (Panobianco e Marcos Filho, 1998;Oliveira e Novembre, 2005). Entretanto, existem poucos trabalhos com ênfase na condutividade elétrica para avaliação da qualidade fisiológica de sementes de feijão-mungo-verde, sendo encontrado na literatura somente trabalho realizado por Hampton et al (1992).…”

Section: Introductionunclassified

Teste de condutividade elétrica para sementes de feijão-mungo-verde

Araújo¹,

Zonta²,

Araújo³

et al. 2011

Rev. bras. sementes

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RESUMO -A utilização de sementes de boa qualidade é fundamental para o estabelecimento adequado de uma lavoura. Para uma análise mais precisa da qualidade de sementes, faz-se necessário complementar as informações fornecidas pelo teste de germinação com testes de vigor, possibilitando, assim, selecionar os melhores lotes para comercialização e semeadura. Dentre esses testes, destaca-se o de condutividade elétrica. Objetivou-se neste trabalho estabelecer uma metodologia adequada para o teste de condutividade elétrica em sementes de feijão-mungoverde, considerando períodos de embebição e número de sementes. Foram utilizados seis lotes de sementes e o teste de condutividade elétrica foi realizado com as seguintes variações: 100, 75 e 50 sementes embebidas em 75 mL de água destilada a 25 °C, com leituras realizadas após 3, 6, 9, 12, e 15 horas de embebição. O teste de condutividade elétrica conduzido com quatro subamostras de 50 sementes embebidas em 75 mL de água destilada permite a separação dos lotes a partir de 3 horas de embebição, mostrando-se promissor na avaliação da qualidade das sementes de feijão-mungo-verde. Termos para indexação: vigor, Vigna radiata (L.) R. Wilczek, teste de vigor. ELECTRICAL CONDUCTIVITY TEST FOR MUNG BEANS SEEDSABSTRACT -Good quality seeds are indispensable for successful crop establishment. A more precise analysis of seed quality requires a complementation of the information supplied by the germination with vigor tests to allow selection of the best lots for commercialization and sowing. Among these tests, the electric conductivity test is important. The objective of this study was to develop a suitable methodology for the electric conductivity test in mung bean seeds, with treatments of different imbibition periods and seed numbers. Six seed lots were used with the following treatments: 100, 75 and 50 seeds imbibed in 75 mL of 25 °C distilled water, and evaluations after 3, 6, 9, 12, and 15 hours of imbibition. The electrical conductivity test done with four subsamples of 50 pure seeds soaked in 75 mL of distilled water at 25 °C, permits a separation of the lots after three hours of soaking, and this procedure would make a quality evaluation of mung bean seeds viable.

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“…This study reaffirms electrolyte leakage as an indicator of seed viability in P. sativum [34] and Cu. Pepo [35]. Furthermore, this study recommends electrolyte leakage as an indicator of seed quality in B. speciosus, Co. erythrophyllum, and E. caffra; to the best of our knowledge, these species have not previously been studied in this regard.…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 95%

“…Electrolyte leakage and seed germination are positively correlated. Therefore, the electrolyte conductivity test, which is an index of membrane stability, has been recommended for the evaluation of seed vigour, for example in Pisum sativum [34] and Cucurbita pepo [35].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Water Imbibition and Controlled Deterioration in Five Orthodox Species

2022

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Orthodox seeds deteriorate even when stored in the best of conditions; hence, it is very important to monitor germination in stored seeds. To assess orthodox seed deterioration, a germination test is usually employed. This study assessed and compared seed deterioration in five orthodox species using electrolyte leakage and Fourier transform infrared spectroscopy (FTIR). The study also compared water imbibition by the test orthodox seeds. To achieve this, the seeds from three wild (Bolusanthus speciosus; Combretum erythrophyllum; Erythrina caffra) and two agricultural (Pisum sativum and Cucurbita pepo) species were imbibed between 20 layers of single-ply paper towel. The other set was subjected to controlled deterioration at 40 °C and 100% relative humidity for 32 d, with samples taken for germination and electrolyte leakage measurement at 4 d intervals. FTIR measurements were performed at 0, 20, and 32 d of controlled deterioration. The results indicated that there were some significant interspecies differences in the imbibition times and seed water contents but these were not large. In all species, uptake of water was complete between about 15 and 25 h. The wild species showed higher sensitivity to controlled deterioration. Complete loss of germinability occurred much earlier in the wild species (20 d in B. speciosus and E. caffra, and 16 d in Co. erythrophyllum) compared with 36 d for the agricultural species P. sativum and Cu. pepo. There was a negative correlation between electrolyte leakage and seed germination in all wild and agricultural species. A strong positive correlation was observed between the time of controlled deterioration, electrolyte leakage, and FTIR transmission in all the species. While controlled deterioration may help in decisions relating to the storage of orthodox seeds, the water imbibition results from this study will help to set the priming time of the species. The study reaffirms electrolyte leakage as an indicator of seed viability in P. sativum and Cu. pepo; it also recommends the use of electrolyte leakage as an indicator of seed deterioration in B. speciosus, Co. erythrophyllum, and E. caffra. The study also recommends FTIR as a tool for monitoring the germination of stored seeds of all the test species.

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Condutividade elétrica em sementes de abóbora, híbrido Bárbara

Cited by 8 publications

References 6 publications

Influence of fungi associated with watermelon seeds on physiological and health quality

Influence of fungi associated with watermelon seeds on physiological and health quality

Teste de condutividade elétrica para sementes de feijão-mungo-verde

A Comparison of Water Imbibition and Controlled Deterioration in Five Orthodox Species

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