Temperaturas para germinação de sementes de Poecilanthe parviflora Bentham (Fabaceae - Faboideae)

Valadares, Jane; Paula, Rinaldo César de

doi:10.1590/s0101-31222008000200020

Cited by 11 publications

(10 citation statements)

References 6 publications

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“…Only in PD seeds, from Mogi Guaçu, the leaching up to the first 10 minutes was significantly lower than that up to the 30 minutes, showing that seeds with lower physiological quality leached high amounts of electrolytes as early as the start of imbibition. However, even for seeds with higher physiological quality, the leaching values were considered high when compared with seeds of other crop or forest species, ranging from 30-160 µS cm -1 gµS -1 (Marques et al, 2002;Santos & Paula, 2005;Valadares & Paula, 2008, Araujo et al, 2011. For Brazilwood seeds, after 10 minutes of imbibition, on average, the electrolyte leaching had reached about 20% of the total leaching within the 24 hours recommended by the test (Vieira, 1994), and after 60 minutes they had reached 37%, that is, 50 minutes after the first evaluation (after 10 minutes), there was an increase of only 17% in leaching (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Kinetics of solute leachate from imbibing Caesalpinia echinata Lam. (Brazilwood) seeds

2014

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The electrical conductivity of leachates from imbibing seeds has been used as a vigor test for several species. The adaptation of this methodology to different species requires knowledge on the leaching kinetics of electrolytes. For Brazilwood seeds, the classic method was not satisfactory and rapid tests are essential because they have low storage capacity at room temperature. Leaching kinetics during seed imbibition is a function of physiological quality, presence or absence of seed coat, imbibing temperature and the initial moisture content of seed. In this study, the electrolyte leaching rate of six different categories of seeds, from two regions, was evaluated in seeds with and without seed coat and incubated with different moisture contents and at different temperatures. The results showed that the electrolyte leaching rate in Brazilwood seeds is independent of the physiological quality, the presence or absence of seed coat and imbibition temperature, but these factors changed the total amount of electrolytes leached. The leaching rate increased in the first few minutes of imbibition, suggesting that the adjustment of the methodology must consider the reduction in imbibition time, reduction in temperature, use of a controlled and slower pre-imbibition, and replacement of the imbibition solution after the first few minutes.

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Section: Resultsmentioning

confidence: 99%

Kinetics of solute leachate from imbibing Caesalpinia echinata Lam. (Brazilwood) seeds

2014

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“…As concentrações de 0,75 e 0,5% produziram excesso de coloração nos embriões viáveis, o que interferiu nos padrões de coloração, em virtude da difusão do corante para embriões metabolicamente inativos. Segundo Valadares et al (2009), a escolha de método adequado para o emprego do teste de tetrazólio em sementes ou embriões se baseia na facilidade para diferenciação de tecidos viáveis e inviáveis e na capacidade de diferenciar lotes de qualidade fisiológica distintas. Assim, a concentração de 0,01% de tetrazólio e o tempo de incubação de 18 horas foram eficientes para os objetivos deste trabalho.…”

Section: Resultsunclassified

Viabilidade e germinação de embriões de oliveira submetidos a diferentes condições de armazenamento de frutos

Souza

Braga

Neto

et al. 2011

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito de diferentes condições de armazenamento na preservação da viabilidade e da germinação de embriões zigóticos de oliveira. Utilizou-se o delineamento inteiramente casualizado, em esquema fatorial 4x2. Frutos da cultivar Santa Catalina foram submetidos a diferentes condições de armazenamento -saco plástico em geladeira a 4-5°C e 15% de umidade relativa (UR), dessecador em geladeira a 4-5°C e 12% UR, saco plástico em laboratório a 27±1°C e 55% UR, dessecador em laboratório a 27±1°C e 30% UR -e aos períodos de armazenamento de 30 e 120 dias. A germinação in vitro e a viabilidade foram avaliadas pelo teste de tetrazólio aos 30 e 120 dias de armazenamento. A maior taxa de germinação (91,66%) e de viabilidade (33,33%) foram observadas a 4-5°C e 12% UR, aos 30 dias. Esta condição de armazenamento preserva os frutos de oliveira por mais tempo.Termos para indexação: Olea europaea, fisiologia de sementes, germinação in vitro, teste de tetrazólio. Viability and germination of olive embryos subjected to different conditions of fruit storageAbstract -The objective of this work was to evaluate the effect of different storage conditions on the preservation of the viability and germination of olive zygotic embryos. A completely randomized block design was used, in a 4x2 factorial arrangement. Fruits of the cultivar Santa Catalina were subjected to different storage conditions -plastic bag in refrigerator at 4-5°C and 15% relative humidity (RH), dissector in refrigerator at 4-5°C and 12% RH, plastic bag at laboratory room at 27±1°C and 55% RH, dissector in laboratory room at 27±1°C and 30% RH -, and to storage periods of 30 and 120 days. In vitro germination and viability were evaluated by the tetrazolium test at 30 and 120 days of storage. The highest germination rate (91.66%) and viability (33.33%) were observed at 4-5°C and 12% RH at 30 days. This storage condition preserves olive fruits for longer time.

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“…O teste de tetrazólio foi eficiente na avaliação da viabilidade das sementes de Poecilanthe parviflora Benthan. quando se utilizou a concentração de 0,1% por um período de duas horas (Valadares et al, 2009). Nessa mesma concentração, mas por um período de três horas, esse procedimento foi ineficiente em sementes de farinha-seca (Albizia hasslerii (Chodat) Burr.…”

Section: Tabela 1 Resumo Da Análise De Variância E Médias (unclassified

Viabilidade de sementes de Piptadenia moniliformis Benth. pelo teste de tetrazólio

Azerêdo

Paula

Valeri

2011

Rev. bras. sementes

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Termos para indexação: espécie florestal, germinação, testes rápidos. DETERMINING THE VIABILITY OF Piptadenia moniliformis Benth SEEDS WITH THE TETRAZOLIUM TESTABSTRACT -Piptadenia moniliformis Benth. is a tree species which is important for beekeeping, as well as being recommended for soil restoration, reforestation, wood production for small civil construction projects, and cattle and sheep forage. Information on how to evaluate seed physiological quality is still scarce and in this was the study aimed to adapt the procedures of the tetrazolium test to assess the viability of P. moniliformis seeds. Four seed lots were scarified in sulphuric acid for 30 min, and soaked between paper towels at 25 °C for 24 hours. The seed coat was then removed and the naked seeds immersed in tetrazolium solutions with concentrations of 0.05, 0.075 and 0.1% for 2, 3, and 4 hours, at 35 ºC in the dark. Each treatment consisted of four replications of 25 seeds. The embryos were classified according to viability based on the staining patterns. The previous soaking of the seeds for 24 hours at 25 ºC between paper towels, followed by the removal of the seed coat and staining of the naked seeds for 4 hours in a 0.075% tetrazolium solution at 35 ºC, was the most efficient method for evaluating the viability of P. moniliformis Benth seeds.

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Temperaturas para germinação de sementes de Poecilanthe parviflora Bentham (Fabaceae - Faboideae)

Cited by 11 publications

References 6 publications

Kinetics of solute leachate from imbibing Caesalpinia echinata Lam. (Brazilwood) seeds

Kinetics of solute leachate from imbibing Caesalpinia echinata Lam. (Brazilwood) seeds

Viabilidade e germinação de embriões de oliveira submetidos a diferentes condições de armazenamento de frutos

Viabilidade de sementes de Piptadenia moniliformis Benth. pelo teste de tetrazólio

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