Heat-treatment and germination of oil palm seeds (Elaeis guineensis Jacq.)

Green, Márcia; Lima, W. A. A. de; Figueiredo, Antenor Francisco de; Atroch, A. L.; Lopes, Ricardo; Cunha, Raimundo Nonato Vieira da; Teixeira, P. C.

doi:10.1590/s2317-15372013000300004

Cited by 19 publications

(19 citation statements)

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“…Tabela 2. Comparação de médias de Germinação (GERM%) de sementes de dendezeiro tipo dura de origem Deli, submetidas a diferentes períodos de Tratamento Térmico (TT) e Intervalos de Grau de Umidade (IGU) (Green et al, 2013), com sementes de caiaué (Lima et al, 2017) e do híbrido interespecífico entre o caiaué e o dendezeiro (Lima et al, 2014).…”

Section: Resultsunclassified

“…Nessa fase, o teor de água não deve ser tão alto para não favorecer a proliferação de fungos ou a germinação durante o TT, nem tão baixo para que a desidratação das sementes não cause danos (até mesmo letais) ao embrião. Os efeitos do TT e do teor de água na superação da dormência de sementes de Elaeis foram objeto de estudos com dendezeiro (Rees, 1962;Corrado & Wuidart, 1990;Fondom et al, 2010;Green et al, 2013), caiaué (Lima et al, 2017) e híbridos F1 de caiaué com dendezeiro (Lima et al, 2014), e os resultados indicaram que as condições adequadas variam de acordo com a espécie e ou genótipo da espécie utilizado no estudo.…”

Section: Introductionunclassified

“…Médias seguidas pela mesma letra minúscula dentro de cada coluna e maiúscula na linha não diferem entre si pelo teste de Tukey a 5% de probabilidade Green et al (2013). avaliaram a germinação de sementes de seis cultivares de dendezeiro tipo tenera, submetidas a TT de 40, 50, 60 e 80 dias, com grau de umidade das sementes de 18 ± 0,5% e verificaram efeito significativo do período de TT e de cultivares, bem como da interação entre estes fatores.…”

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“…No entanto, os autores concluíram que, de maneira geral, as sementes de dendezeiro apresentam maior taxa de germinação com a combinação do grau de umidade de 18 ± 0,5% e 60 dias de TT.Para as sementes tipo dura de origem Deli utilizadas neste estudo, os resultados indicam que com 30 dias de TT e IGU ajustado para o intervalo de 18%-19% é possível obter taxas de germinação superiores a 90%. Isto representa redução no tempo de TT quando comparado ao recomendado por outros autores para cultivares de dendezeiro tipo tenera(Green et al, 2013).Para PCON, quando comparadas às médias de IGU dentro de períodos de TT (Tabela 3), destaca-se também como favorável o IGU de 18%-19%, visto ter apresentado com 30 dias de TT média superior aos demais IGU e, com 45 e 60 dias, valores não diferindo das médias superiores. Na comparação das médias dos períodos de TT dentro de IGU, com exceção do IGU de 18%-19%, no qual as médias dos diferentes períodos de TT não diferiram entre si, nos demais IGU as médias com 45 e 60 dias de TT não diferiram significativamente entre si e foram superiores às verificadas com 30 dias de TT.…”

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Umidade e aquecimento térmico na superação de dormência de sementes de dendezeiro tipo dura

Green¹,

Lima

Lopes

2019

RCA

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Section: Resultsunclassified

Section: Introductionunclassified

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Umidade e aquecimento térmico na superação de dormência de sementes de dendezeiro tipo dura

Green¹,

Lima

Lopes

2019

RCA

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“…Pregermination by warm stratification of seeds of tropical plants is common practice of propagation for some important crops like oil palm (Elaeis guineensis Jacq.) (Green et al, 2013). The effect of this practice is not only to promote seed hydration but also to enhance the biosynthesis of stressresponse substances, like heat-shock proteins, which can play a role in the fast removal of inhibitors of seed germination (Collada et al, 1997;Bailly, 2004;Berjak and Pammenter, 2008).…”

Section: Discussionmentioning

confidence: 99%

Effects of pre-sowing treatments on Jatropha curcas seed germination and seedling growth

Lubino¹,

Nicla²,

Luca³

et al. 2015

Afr. J. Agric. Res.

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This study aimed to investigate the effects of different pre-sowing treatments on Jatropha curcas seed germination rate and seedling early growth. Growth and vigour of the seedlings was assessed through the measurements of growth parameters, in order to identify the best pre-sowing treatment, which guarantees both the highest seed germination rate and the best development and growth of the seedlings. J. curcas seeds of the 'Indian' cultivar were collected in Tamale region (Ghana) and subjected to five different pre-sowing treatments: i) control; ii) soaking in 30°C water for 24 h; iii) hammer shell cracking; iv) warm stratification at 37°C for 24 h; v) hammer shell cracking plus warm stratification at 37°C for 24 h. Amongst the sixteen indices considered in the experiment (six germination indices and ten growth rate indices), results revealed that the tested pre-sowing treatments influenced much more seed germination than seedling growth. Shell cracking treatment enhanced seed germination and warm stratification promoted emergence rate and seedling growth as compared to the other tested treatments.

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Histodifferentiation of oil palm somatic embryo development at low auxin concentration

et al. 2017

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Large-scale propagation of oil palm (Elaeis guineensis, Jacq.) is difficult due to its single apical meristem. Thus, obtaining plants is mainly through seed germination, and a long growing period is required before oil production is possible. An alternative to large-scale seedling production is indirect somatic embryogenesis. The aim of this study was to analyze the somatic embryogenesis process in oil palm (E. guineensis Jacq.) with amino acids and low concentrations of auxins. The Tenera hybrid was analyzed by cytochemical and ultrastructural methods and was used to regenerate oil palm plants. First, calli were induced in MS culture media supplemented with 2,4-D and picloram. Two types of calli were obtained, characterized by beige or translucent color. Beige calli had embryogenic characteristics, such as large nuclei with prominent nucleoli, and they were multiplied for 8 months in MM culture (half strength MS, 1 mg L 2,4-D, 2 mg L 2iP, 1 mg L IBA, 250 mg L citric acid, 10 mg L cysteine, 100 mg L inositol, 1 mg L thiamine, 1 mg L pyridoxine, 1 mg L nicotinic acid, 1 mg L glycine, 200 mg L malt extract, and 100 mg L casein hydrolysate). After multiplication, the MCB culture medium (half strength MS, supplemented with 0.25 mg L NAA, 2 mg L BAP, MM vitamins and 200 mg L malt extract, and 100 mg L casein hydrolysate) was the most efficient for embryo formation, showing meristematic centers with totipotent cells in histochemical analyses. The somatic embryos were developed and germinated in MG medium (half strength MS, 0.45 mg L IAA, 0.25 mg L BAP, and MM vitamins), transplanted into polyethylene tubes containing pine bark substrates, and acclimatized in a greenhouse, achieving a 97% survival rate. The use of picloram for callus induction and somatic embryogenesis is advantageous and multiplication in MM medium is an important step for increasing cell mass. The calli with light beige color and nodular structures have meristematic cells with dense cytoplasm and totipotential features that later give rise to protoderm, procambium, and ground meristem during the globular, cordiform, and torpedo embryogenesis phases. In MCB medium, the concentration of vitamins and amino acids are crucial for somatic embryogenesis.

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Heat-treatment and germination of oil palm seeds (Elaeis guineensis Jacq.)

Cited by 19 publications

References 3 publications

Umidade e aquecimento térmico na superação de dormência de sementes de dendezeiro tipo dura

Umidade e aquecimento térmico na superação de dormência de sementes de dendezeiro tipo dura

Effects of pre-sowing treatments on Jatropha curcas seed germination and seedling growth

Histodifferentiation of oil palm somatic embryo development at low auxin concentration

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