TRATAMENTOS FÍSICOS E QUÍMICOS PARA ACELERAR E UNIFORMIZAR A EMERGÊNCIA DE PLÂNTULAS DE Erythrina velutina Willd.

Souza, Vanessa Cristina de Oliveira; Araújo, Ariana Veras de; Pinto, Monalisa Alves Diniz da Silva Camargo; Brito, A. S.

doi:10.18677/enciclopedia_biosfera_2016_117

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Em relação ao tempo médio de germinação, nenhum dos tratamentos avaliados apresentou resultados com diferenças significativas, mas vale ressaltar que o intervalo de tempo que as demais plântulas levaram para emergir em relação à primeira plântula normal é um aspecto importante quando se almeja um estande de plântulas uniformes. Souza et al (2016), utilizando tratamentos físicos e químicos para acelerar e uniformizar a emergência de plântulas de mulungu (Erythrina velutina Willd), observaram que não houve diferença significativa entre seus tratamentos em relação ao tempo médio de germinação.…”

Section: Resultsunclassified

Tratamentos pré-germinativos para a superação de dormência em sementes de Adenanthera pavonina L.

Oliveira¹,

Aguiar²,

Sousa³

et al. 2021

ABC

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Adenanthera pavonina L. é uma espécie arbórea com importância comercial por fornecer madeira de qualidade para construção, sendo também utilizada emreflorestamentos, preservação permanente e arborização urbana. Suas sementes são usadas em peças artesanais e medicamentos fitoterápicos. Diante da importância, objetivou-se avaliar a eficiência de diferentes tratamentos pré-germinativos, com vistas a identificar o mais indicado para a superação de dormência das sementes. Os tratamentos pré-germinativos testados foram: T1: testemunha, T2: escarificação mecânica com lixa n.º 80 por 20 segundos na região oposta ao hilo, T3: escarificação mecânica com lixa n.º 80 por 20 segundos na região oposta ao hilo + 20 min de embebição em água, T4: desponte com alicate na região oposta ao hilo, T5: desponte com alicate na região oposta ao hilo + 20 min de embebição em água. As variáveis analisadas foram: índice de velocidade de emergência, porcentagem de germinação, tempo médio de germinação, coeficiente de velocidade de germinação e velocidade média de germinação. Os tratamentos com escarificação e desponte não diferiram entre si estatisticamente, mas produziram resultados superiores quando comparados à testemunha, comprovando a importância e a eficácia do uso de mecanismos para superação de dormência de Adenanthera pavonina L.

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Section: Resultsunclassified

Tratamentos pré-germinativos para a superação de dormência em sementes de Adenanthera pavonina L.

Oliveira¹,

Aguiar²,

Sousa³

et al. 2021

ABC

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show abstract

“…Therefore, the consumption of energy reserves during the germination process will be lower. Such reserves thus contribute to the development of seedlings (Souza, Araújo, Pinto, & Brito, 2016).…”

Section: Resultsmentioning

confidence: 99%

Seed vigor of Piptadenia moniliformis Benth. subjected to thermal stress

Silva

2020

Acta Sci. Biol. Sci.

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The objective of this work is to evaluate the influence of accelerated aging test at 41ºC on the germination and seed vigor of Piptadenia moniliformis Benth. Two experiments were conducted. Experiment 1: seeds were submitted to dormancy overcoming treatments. They were immersed into sulfuric acid for 0 (intact seeds), 5, 10, 15, 20 and 25 minutes. Experiment 2: two methods were evaluated for the accelerated aging test at 41ºC, that is, the traditional method and the saturated NaCl solution method with exposure periods of 0, 24, 48, 72 and 96 hours. After each treatment, the seeds were subjected to electrical conductivity and germination tests. Seeds overcame their dormancy when immersed into concentrated sulfuric acid for 5, 10, 15, 20 or 25 minutes, but the germination was faster when immersed for 20 minutes. The different methods for the accelerated aging test, decreased the germination potential and seed vigor of P. moniliformis after 24 hours of exposure. Regarding the method used, the saturated solution provided, in general, the best results since the seed water content was lower, thus reducing the proliferation of fungi. The electrical conductivity test showed that, by increasing the aging period regardless of the method, there is an increase in seed deterioration, corroborating with germination results, which showed that the correlation was moderate and negative and indicated that the higher the conductivity, the lower the percentage and the germination speed index. The immersion of seeds of P. moniliformis into concentrated sulfuric acid for 20 minutes provides a fast and increased germination. The methods for accelerated aging at 41ºC, traditional and saturated solution, can be used as vigor tests to evaluate the physiological quality of seeds.

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Anatomy and Germination of Erythrina velutina Seeds under a Different Imbibition Period in Gibberellin

Guariz

Shimizu

Paula

et al. 2022

Seeds

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The knowledge of the physiological aspects of Caatinga’s vegetal species is extremely important for preserving this biome, which suffers with human impacts, mainly to select propagation methods. Erythrina velutina is a Brazilian tree, generally found in Caatinga, with medical and forestry potential. The objective of this paper was to determine the best soaking period in gibberellin solution to achieve the highest germination and to evaluate the internal anatomy by digital microtomography of E. velutina seeds. The design was completely randomized and consisted of eight treatments: 1, 3, 6, 12, 24 and 48 h of soaking, scarified seeds and the control with no-scarified seeds. Digital microtomography was efficient in describing the anatomy of the seeds and distinguishing their tissues. There was no significant difference between the treatments at different soaking times, as the gibberellic acid did not influence the germination; only the control presented a lower germination percentage, differing from the other treatments. The study presents evidence that E. velutina seeds do not require the exogenous use of gibberellic acid, but only the scarification process. In addition, the use of digital microtomography can be useful in understanding the anatomy of seeds, especially forest species, which can contribute to the future studies of other plant species.

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TRATAMENTOS FÍSICOS E QUÍMICOS PARA ACELERAR E UNIFORMIZAR A EMERGÊNCIA DE PLÂNTULAS DE Erythrina velutina Willd.

Cited by 3 publications

References 6 publications

Tratamentos pré-germinativos para a superação de dormência em sementes de Adenanthera pavonina L.

Tratamentos pré-germinativos para a superação de dormência em sementes de Adenanthera pavonina L.

Seed vigor of Piptadenia moniliformis Benth. subjected to thermal stress

Anatomy and Germination of Erythrina velutina Seeds under a Different Imbibition Period in Gibberellin

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