Temperatura, luz e substrato para germinação de sementes de Pau-Brasil (Caesalpinia echinata Lam., Leguminosae - Caesalpinioideae)

Mello, Juliana Iura de Oliveira; Barbedo, Claudio José

doi:10.1590/s0100-67622007000400009

Cited by 34 publications

(34 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, even in these concentrations the germination was greater than 30% (Table 3), confirming the desiccation tolerance in seeds of C. echinata (Barbedo et al, 2002). Also confirmed was the low storage capacity of the seeds of this species in a nonrefrigerated environment (Mello et al, 2013) because even with very low WC there was reduction in the germination and in the values of germinated seeds; the longer the period of storage, the lower the germinability (Table 3). After 75 days of storage almost all seeds lost the ability to produce normal seedlings and start the growth of the primary root.…”

Section: Seed Storage In Flasks With Saturated Salt Solutionsmentioning

confidence: 52%

“…After this selection, the seeds were dried to approximately 10% water content -WC (wet basis), in an oven at 40 °C (Barbedo et al, 2002). They were then stored in a freezer at -18 °C (Hellmann et al, 2006;Mello et al, 2013) until the beginning of the experiments, not exceeding seven days of the date of collection.…”

Section: Methodsmentioning

confidence: 99%

“…Germination tests were carried out in germination chambers (25 ± 1 °C and 90 ± 5%) in paper rolls, with assessments every three days up to 15 days (Mello and Barbedo, 2007). Seeds that issued primary root with at least 1 cm were used to calculate the percentage of germinated seeds; those resulting in the development of normal seedlings (Barbedo et al, 2002) were used to calculate the percentage of germination.…”

Section: Methodsmentioning

confidence: 99%

“…Brazilwood seeds have an orthodox behavior and can maintain viability for up to 18 months when stored at 7 °C (Barbedo et al, 2002) and up to five years at -18 °C (Mello et al, 2013), at water content of about 10% in both cases. However, studies are inconclusive with regard to the storage of these seeds at room temperature, hindering the use of this low-cost way of storage (Lamarca and Barbedo, 2012).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Viability of Brazilwood seeds (Caesalpinia echinata Lam.) stored at room temperature in controlled atmospheres

Neto

Barbedo

2015

J. Seed Sci.

Self Cite

View full text Add to dashboard Cite

-Seed storage at room temperature is an important and low-cost tool for ex situ conservation. However, the high rates of seed deterioration could reduce the potential for storage in this condition. Therefore, the knowledge of the suitable water content for this type of storage plays a critical role. This study aimed to assess the time required to stabilize the relative humidity (RH) in sealed flasks with saturated salt solutions, with or without the introduction of seeds of Caesalpinia echinata, as well as to assess the viability of these seeds stored in environments with different hygroscopic equilibrium. The results showed that 2 and about 12 days are needed to stabilize the RH, respectively, without or with the seeds. The amount of saturated salt solutions in this airtight environment influences both the speed to equilibrate the RH and the final values of the RH. Seeds of Caesalpinia echinata tolerate drying up to 5% water content (wet basis); however, the viability of these seeds at room temperature is maintained for short periods even at low water content.Index terms: storage, hygroscopic equilibrium, desiccation tolerance.Viabilidade de sementes de pau-brasil (Caesalpinia echinata Lam.) mantidas em temperatura ambiente com atmosferas controladas RESUMO -O armazenamento de sementes em temperatura ambiente é uma importante ferramenta como estratégia de conservação ex situ. No entanto, as altas taxas de deterioração diminuem o potencial de armazenamento. Diante disso, a busca do teor de água ótimo para este tipo de armazenamento assume papel fundamental. Este trabalho teve por objetivo avaliar o período necessário para equilíbrio da umidade relativa do ar (UR) em frascos herméticos a partir da introdução de soluções salinas saturadas e de sementes de Caesalpinia echinata, bem como avaliar a capacidade de manutenção da viabilidade dessas sementes em ambientes com diferentes equilíbrios higroscópicos. Os resultados permitiram verificar que são necessários dois dias para equilíbrio da UR a partir da inclusão de soluções salinas saturadas em ambiente hermético sem a presença de sementes, e cerca de 12 dias com a presença das sementes; que a quantidade de soluções salinas presente no ambiente hermético influencia a velocidade de equilíbrio da UR e o equilíbrio ao final do período e as sementes de Caesalpinia echinata suportam secagem até teores de água de 5% (base úmida), mas mesmo com baixo teor de água estas sementes conservam-se por curtos períodos quando em temperatura ambiente.Termos para indexação: armazenamento, equilíbrio higroscópico, tolerância à dessecação.

show abstract

Section: Seed Storage In Flasks With Saturated Salt Solutionsmentioning

confidence: 52%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Viability of Brazilwood seeds (Caesalpinia echinata Lam.) stored at room temperature in controlled atmospheres

Neto

Barbedo

2015

J. Seed Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Geralmente a faixa térmica adequada para a germinação de sementes de espécies florestais está entre 20 e 30 °C (Mello & Barbedo 2007, Stockman et al 2007, Coelho et al 2008, Cardoso & Pereira 2009, Pires et al 2009, Pimenta et al 2010, Lamarca et al 2011. Contudo, podem ocorrer variações dentro da mesma espécie, em função das condições do ambiente de formação das sementes (Lamarca et al 2011).…”

Section: Introductionunclassified

Germinação de sementes de Maclura tinctoria (Moraceae) sob diferentes regimes térmicos influenciados pela luz

Guardia

Lamarca

2013

Hoehnea

View full text Add to dashboard Cite

-(Seeds germination of Maclura tinctoria (Moraceae) under different thermal regimes influenced by light). This study aimed to characterize germination of Maclura tinctoria seeds under different thermal regimes and alterations due presence or absence of light. Seeds were collected in Rio Claro, Ajapi, Itirapina, and Serra Negra, São Paulo State, Brazil. The results demonstrated that, in presence of light, seeds germinate in a wide temperature range (15 to 35 °C) and better perform between 20 and 30 °C. The ideal temperature for seed germination was 30 °C. In the absence of light, germination percentage decreased as the temperature diminished and germination temperature range was narrowed, changing the ideal temperature for germination, showing that the seeds of Maclura tinctoria require presence of light to express their maximum germination rate. Key words: forest seeds, storage, taiúva RESUMO -(Germinação de sementes de Maclura tinctoria (Moraceae) sob diferentes regimes térmicos influenciados pela luz). Este estudo teve como objetivo caracterizar a germinação de sementes de Maclura tinctoria sob diferentes regimes térmicos e alterações decorrentes da presença e ausência de luz. As sementes foram obtidas em Rio Claro, Ajapi, Itirapina e Serra Negra, SP. Os resultados demonstraram que na presença de luz as sementes germinam em ampla faixa térmica (15 a 35 °C) e apresentam melhor desempenho entre 20 e 30 °C, sendo 30 °C a temperatura ideal para a germinação. Na ausência de luz a germinação decresceu à medida que a temperatura diminuiu e a faixa térmica germinativa se estreitou, alterando também a temperatura ideal para a germinação, mostrando que as sementes de Maclura tinctoria necessitam de luz para expressar a taxa máxima de germinação.

show abstract

Relationship between N, P, and K and the quality and stem structural characteristics of Caesalpinia echinata Lam. plants

Cuzzuol

Milanez

Gomes

et al. 2013

Trees

View full text Add to dashboard Cite

Temperatura, luz e substrato para germinação de sementes de Pau-Brasil (Caesalpinia echinata Lam., Leguminosae - Caesalpinioideae)

Cited by 34 publications

References 11 publications

Viability of Brazilwood seeds (Caesalpinia echinata Lam.) stored at room temperature in controlled atmospheres

Viability of Brazilwood seeds (Caesalpinia echinata Lam.) stored at room temperature in controlled atmospheres

Germinação de sementes de Maclura tinctoria (Moraceae) sob diferentes regimes térmicos influenciados pela luz

Relationship between N, P, and K and the quality and stem structural characteristics of Caesalpinia echinata Lam. plants

Contact Info

Product

Resources

About