Estresse hídrico e térmico na germinação de sementes de Leucaena leucocephala (Lam.) de Wit

Felix, Francival Cardoso; Araújo, Fernando dos Santos; Silva, Mariana Duarte da; Ferrari, Cibele dos Santos; Pacheco, Mauro Vasconcelos

doi:10.5039/agraria.v13i2a5515

Cited by 12 publications

(7 citation statements)

References 8 publications

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“…The most abrupt decrease in germination was observed in seeds submitted to a temperature of 35 °C. Germination and vigor are negatively affected if temperature extremes tolerated by seeds (cardinal temperatures) are exceeded (Felix et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

Rodrigues¹,

Alves²,

Silva³

et al. 2020

JAS

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The Caesalpinia echinata Lam. species, belongs to the Fabaceae family, popularly known as Pau Brazil, is a large tree, native to Brazil, that can be found from Ceará to Rio de Janeiro, with a relevant national historic and economic value. The objective of this study was to evaluate the effects of water stress at different temperatures on germination and seed vigor. The experiment was carried out at the Laboratório de Análise de Sementes of the Centro de Ciências Agrárias of the Universidade Federal da Paraíba, Areia-Paraíba. The water stress was formulated with solutions of polyethylene glycol 6000 (PEG 6000) in different osmotic potentials of 0.0 (control), -0.2; -0.4; -0.6 MPa at constant temperatures of 25, 30 and 35 °C, in a completely randomized design. The percentage of germination, first counting of germination, germination speed index, length and dry matter of seedlings were evaluated to determine the effects of the treatments. Decreases of the osmotic potential negatively influenced the germination and vigor of C. echinata seeds at the three evaluated temperatures (25 ºC, 30 ºC, 35 °C).

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Section: Resultsmentioning

confidence: 99%

Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

Rodrigues¹,

Alves²,

Silva³

et al. 2020

JAS

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“…Many proteins that are induced in the early stages of water stress are also involved in root morphogenesis and carbon/nitrogen metabolism, which may contribute to the nullification of stress by increasing root growth [33]. In the case of L. leucocephala, the literature reports that it is a plant which can adapt to inhospitable conditions, and such rusticity can favor the tolerance of its seeds under different conditions.…”

Section: Resultsmentioning

confidence: 99%

Physiological Quality in Leucaena leucocephala Seeds Conditioned with Potassium Nitrate Submitted to Saline and Water Stresses

Silva

Demartelaere

et al. 2019

JEAI

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Leucaena leucocephala is a species that occurs in semi-arid regions capable of developing physiological and biochemical strategies under adverse environmental situations, such as saline soils and water deficiency. Even so, there are still losses in germination and initial development of plants, mainly due to abiotic stress effects, making it necessary to implement alternatives which are able to diminish the impact on the seeds with the use of potassium nitrate. The objective of this work was to evaluate the physiological quality in L. leucocephala seeds conditioned in potassium nitrate solution and subjected to saline and water stresses. After scarification, the unconditioned leucine seeds were separated and identified, and the conditioners were immersed in the 1.0 Mmol/L solution of potassium nitrate for 24 hours. The treatments were NaCl: 0; 30; 60; 90; 120 and 150 Mmol/L and the water potential: 0, 0; -0.2; -0.4; -0.6, and -0.8 MPa. The seeds were distributed over two Germitest® sheets, moistened with distilled water 2.5 times the dry weight and incubated in a B.O.D. at 25°C for 10 days. Then, the germination speed index, seedling length and seedling mass were measured for the normal seedlings. Eleven treatments with four replicates of 50 seeds were used. The design was completely randomized, and the statistical analyzes were performed in SAS. The use of potassium nitrate (KNO3) contributed to maintaining the physiological quality of L. leucochephala seeds under conditions of saline stress and water restriction.

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“…Alguns estudos foram realizados para avaliar a influência do peso de sementes na germinação e na qualidade fisiológica de muitas espécies de plantas. No entanto, pesquisas ainda são escassas para espécies florestais, as quais possuem uma variabilidade fenotípica bastante alta (FELIX et al, 2018;ARAÚJO et al, 2020).…”

Section: Introductionunclassified

Climatização De Residências Com Uso De Recicláveis

Santana¹,

Arguelho²,

Júnior³

et al. 2021

Ciências Biológicas: Realidades E Virtualidades 2

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Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0).O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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Estresse hídrico e térmico na germinação de sementes de Leucaena leucocephala (Lam.) de Wit

Cited by 12 publications

References 8 publications

Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

Seeds of Caesalpinia echinata Lam. Under Water Stress at Different Temperatures

Physiological Quality in Leucaena leucocephala Seeds Conditioned with Potassium Nitrate Submitted to Saline and Water Stresses

Climatização De Residências Com Uso De Recicláveis

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