Tratamentos para superar dormência de sementes de Cassia fistula L.

Guedes, Roberta Sales; Alves, Edna Ursulino; Santos-Moura, Sueli da Silva; Costa, Edílson; Melo, Paulo Alexandre Fernandes Rodrigues de

doi:10.5007/2175-7925.2013v26n4p11

Cited by 17 publications

(19 citation statements)

References 19 publications

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“…Bowdichia virgilioides seeds also showed impaired germination when subjected to hot water at 80 °C (Albuquerque et al, 2007). These results show that, although the boiling water softens the outside of the seed and increase fluid absorption capacity, it can also denature both tegument as embryo proteins, affecting the viability and integrity of this proteins of seed tissues (Guedes et al, 2013).…”

Section: Resultsmentioning

confidence: 84%

Dormancy Breaking in Senna Pendula (Willd.) H. S. Irwin & Barneby

2018

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Senna pendula seeds dormancy is caused by impermeability of the seed coat to water. In order to determine the best methodology to overcome dormancy and to perform a morphological characterization, two batches of seeds were submitted to the following treatments: a) mechanical scarification of the seed coat; b) immersion in hot water at 70 °C for 5, 10, 15 and 20 minutes; c) immersion in hot water at 90 °C for 5, 10, 15 and 20 minutes; d) sulfuric acid concentrate for 5, 10, 15 and 20 minutes; e) no treatment. The experiment was conducted in laboratory using a completely randomized design, with four replications of 25 seeds each, with daily verification for 7 days. The results showed that the use of water does not overcome the dormancy, however mechanical and chemical scarifications were the most effective treatments, with germination percentage of up to 94%.

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Section: Resultsmentioning

confidence: 84%

Dormancy Breaking in Senna Pendula (Willd.) H. S. Irwin & Barneby

2018

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“…Para a testemunha não houveram sementes germinadas (Tabela 1). Guedes et al (2013) trabalhando com Cassia fistula L, obtiveram resultados, em que os maiores valores de velocidade de germinação ocorreram quando as sementes foram submetidas à escarificação mecânica. Constatou-se a eficiência do processo de escarificação mecânica em superar a dormência tegumentar das sementes, de forma que estas puderam expressar o seu máximo potencial fisiológico.…”

Section: Resultsunclassified

MÉTODOS PARA SUPERAÇÃO DE DORMÊNCIA EM SEMENTES DE Delonix regia (Hook.) Raf

Soares¹,

Araújo²,

Rios³

et al. 2018

Agrarian

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RESUMO Delonix regia (Hook.) Raf., conhecida popularmente como flamboyant, é uma espécie arbórea ornamental exótica, pertencente à família das Fabaceas, suas sementes possuem dormência do tipo tegumentar. O objetivo deste estudo foi verificar a eficácia dos métodos para superação de dormência de sementes da espécie. As sementes foram submetidas aos seguintes tratamentos: imersão em água por 24 horas (T1); desponte (T2) e testemunhas-sementes intactas (T3). Os dados foram coletados por observação direta intensiva, observação da germinação e tempo do processo nos tratamentos estudados. Utilizou-se o delineamento inteiramente ao acaso, com quatro repetições de 25 sementes cada. As médias foram comparadas pelo teste de Tukey, a 1% de probabilidade. As características avaliadas foram: porcentagem de germinação, índice de velocidade de germinação e dimensões da semente. O tratamento que envolveu imersão em água não superou a dormência de sementes de flamboyant. Constatou-se que o tratamento de desponte mostrou-se mais eficiente na germinação de sementes de flamboyant. PALAVRAS-CHAVE: Emergência, germinação, sementes florestais. ANALYSIS OF DIFFERENT TREATMENTS FOR SEED DORMANCY BREAKING OF Delonix regia (Hook.) Raf ABSTRACT Delonix regia (Hook.) Raf., popularly known as flamboyant, is an ornamental exotic arboreal species, belonging to the family of the Fabaceas, its seeds have dormancy of integumentary type. The objective of this study was to verify the effectiveness of

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“…In the same way, Apeiba tibourbou Aubl. (Guedes et al, 2011) and Cassia fistula L. (Guedes et al, 2013) seeds submitted to mechanic scarification with sandpaper, with and without imbibition in water for 24 h and set to germinate at 30°C presented a larger number of normal seedlings at first count.…”

Section: Resultsmentioning

confidence: 99%

Temperature and pre-germinative treatments for overcoming Acacia farnesiana (L.) Willd. (Fabaceae) seeds dormancy

Paulo¹,

Edna²,

Antonio³

et al. 2016

Afr. J. Agric. Res.

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Acacia farnesiana L. is a species known for its uses in recovery of degraded pastures, animal feeding, medical and fungicide properties. However, it is one of the most problematic invasive species in agriculture, due to the little known dormancy aspects of its seeds that results in the propagation and dispersion to distinct areas and the establishment of the invasive plant. The knowledge on ecophysiological characteristics of invasive species seeds aiming at the dormancy process is important for the comprehension of aggressive regeneration unities, and allows the development of strategies against infestation of new areas and reduction of soil seed banks. The objective of this research was to assess how A. farnesiana seeds overcome dormancy using different temperatures and pre-germinative treatments. The study was conducted in Federal University of Paraiba, using seeds obtained from fruits of ten matrix trees in Paraiba State, Brazil. The completely randomized design was adopted, with treatments arranged in a 3 x 15 factorial scheme representing temperatures and pregerminative treatments with four replicates. Parameters related to germination percentage, germination and emergency index were assessed, with best results observed in seeds scarified with sandpaper 80 followed by imbibitions of water at environmental temperature (25-30°C) for 24 h.

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Tratamentos para superar dormência de sementes de Cassia fistula L.

Cited by 17 publications

References 19 publications

Dormancy Breaking in Senna Pendula (Willd.) H. S. Irwin & Barneby

Dormancy Breaking in Senna Pendula (Willd.) H. S. Irwin & Barneby

MÉTODOS PARA SUPERAÇÃO DE DORMÊNCIA EM SEMENTES DE Delonix regia (Hook.) Raf

Temperature and pre-germinative treatments for overcoming Acacia farnesiana (L.) Willd. (Fabaceae) seeds dormancy

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