Superação da dormência em sementes de Caesalpinia pyramidalis Tul

Alves, Edna Ursulino; Cardoso, Edson de Almeida; Bruno, Riselane de Lucena Alcântara; Alves, Arnaud Azevêdo; Alves, Anarlete Ursulino; Galindo, Évio Alves; Braga, Joel Martins

doi:10.1590/s0100-67622007000300006

Cited by 36 publications

(30 citation statements)

References 27 publications

(25 reference statements)

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“…Regarding mean emergence time, both sandpaper and seed lopping favoured the reduction of this variable ( Figure 2C). Alves et al (2007) achieved higher germination speed and lower mean time with mechanical scarification using sandpaper was used for C. pyaramidalis Tull. seeds.…”

Section: Resultsmentioning

confidence: 99%

Dormancy overcoming, temperatures and substrates on germination of Mimosa tenuiflora Willd seeds

Benedito

Ribeiro

Torres

et al. 2017

SCA

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Mimosa tenuiflora Willd., popularly known as jurema-preta, is an arboreal species of great importance for the brazilian Northeast due to its uses as a medicinal plant and in the restoration of degraded soils. No information is available in the Rules for Seed Analysis and the Instructions for Seed Analysis of Forest Species regarding ideal conditions for of this species. Thus, this study aimed at evaluating the influence of pre-germination treatments, in addition to verifying the germination performance at different temperatures and in different substrates. In both experiments, four replicates of 25 seeds were used for each treatment. In experiment I, seeds were submitted to the following methods for overcoming dormancy: witness -Intact seeds (T1) immersion in water at 100 °C for 1 (T2), 2 (T3), 3 (T4), 4 (T5), 5 (T6) and 6 min (T7), immersion in concentrated sulfuric acid for 1 (T8), 4 (T9), 7 (T10), 10 (T11) and 13 min (T12), scarification on sandpaper n° 80 (T13) and lopping in the region opposite the micropyle (T14). In experiment II, seed germination was evaluated in four types of substrates: between sand, paper on, paper roll and between vermiculite and at six different temperatures: 20, 25, 30, 35, 40 °C and alternating between 20 and 30 °C. Immersion in hot water for 1, 2, 3, 4, 5 and 6 min, sulfuric acid treatment for 10 and 13 min, sand paper and lopping were the most appropriate treatments to overcome seed dormancy. The seed germination of M. Tenuiflora should be carried out at 25 °C on paper roll substrate. Key words: Jurema-preta. Seed germination. Caatinga. Seed analysis. ResumoMimosa tenuiflora Willd. conhecida popularmente como jurema-preta é uma espécie arbórea de grande importância para o Nordeste brasileiro pela sua multiplicidade de usos, como na medicina popular, recuperação de solos degradados e fixação de nitrogênio. Ainda não há informações disponíveis nas Regras para Análise de Sementes e nas Instruções para Análise de Sementes de Espécies Florestais com relação às condições ideais para condução do teste de germinação desta espécie. Dessa forma, objetivou-se avaliar a influência da aplicação de tratamentos pré-germinativos, além de verificar o desempenho da germinação em diferentes temperaturas e substratos. Em ambos os experimentos foram utilizados quatro repetições de 25 sementes para cada tratamento. No experimento I, as sementes foram submetidas aos seguintes métodos para superação de dormência: testemunha -sementes intactas (T1), imersão em água a 100 °C por um (T2), dois (T3), três (T4), quatro (T5), cinco (T6) e seis minutos (T7), imersão em ácido sulfúrico concentrado por um (T8), quatro (T9), sete (T10), dez (T11) e treze minutos (T12), escarificação em lixa n° 80 (T13) e desponte na região oposta a micrópila (T14). No experimento II, a germinação das sementes foi avaliada em quatro tipos de substratos: entre areia, sobre papel, rolo de papel e entre vermiculita e em seis temperaturas: 20 °C, 25 °C, 30 °C, 35 °C, 40 °C e alternada 20-30 °C. A imersão em água quente por 1,...

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Section: Resultsmentioning

confidence: 99%

Dormancy overcoming, temperatures and substrates on germination of Mimosa tenuiflora Willd seeds

Benedito

Ribeiro

Torres

et al. 2017

SCA

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“…Por isso, em viveiros, a imersão em água quente é um método de superação de dormência mais empregado devido à facilidade do tratamento, baixo custo e pequeno risco ao trabalhador (FOWLER;BIANCHETTI, 2000;ALVES et al, 2007). Tabela 1.…”

Section: Resultsunclassified

“…(ALVES et al, 2007) foram verificados resultados contrários, ou seja, favoráveis à germinação utilizando-se água quente.…”

Section: Tratamentos De Superaçãounclassified

Método de colheita e superação de dormência na qualidade fisiológica de sementes de Cassia ferruginea

et al. 2012

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Resumoselecionados com base na germinação do experimento anterior). As sementes obtidas de frutos colhidos no chão ou na planta apresentam resposta diferenciada aos tratamentos de superação de dormência. Para a obtenção de sementes de C. ferruginea com máxima qualidade fisiológica, os frutos devem ser colhidos no chão e as sementes devem ser submetidas a escarificação com lixa ou H 2 SO 4 por 30 a 60 min. Palavras-chave: Sistema de colheita, germinação, sementes duras AbstractThe harvesting method of fruits of tree species should be adequate to obtain seeds of maximum physiological quality. When present, the dormancy of Cassia ferruginea seeds is due to seed coat impermeability to water. This research work viewed to find the best methods both for the harvesting and for the breaking of dormancy of seeds of that species. The experiment was conducted during two years. In the first, fruits shed from the mother plant and laying on the ground were picked and their seeds submitted to the following treatments: 1. control, 2. mechanical scarification of the seeds with sandpaper no. 220, 3. hot water for 5 minutes (initial and final temperatures of 82 and 69 ºC, respectively), 4. hot water for 15 minutes (initial and final temperatures of 82 and 51 ºC, respectively),

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“…(Lopes et al, 2006), Caesalpinia pyramidalis Tul. (Alves et al, 2007), Merremia aegyptia L. (Pereira et al, 2007), with seeds scarified by H 2 SO 4 , as well observed in Caesalpinia leiostachya (Benth.) Ducke.…”

Section: Resultsmentioning

confidence: 81%

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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Superação da dormência em sementes de Caesalpinia pyramidalis Tul

Cited by 36 publications

References 27 publications

Dormancy overcoming, temperatures and substrates on germination of Mimosa tenuiflora Willd seeds

Dormancy overcoming, temperatures and substrates on germination of Mimosa tenuiflora Willd seeds

Método de colheita e superação de dormência na qualidade fisiológica de sementes de Cassia ferruginea

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

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