Interferência alelopática de extratos de Hovenia dulcis na germinação e desenvolvimento de Parapiptadenia rigida

Autores

DOI:

https://doi.org/10.4336/2025.pfb.45e202102237

Palavras-chave:

Aleloquímicos, Maceração, Percolação

Resumo

Este trabalho relata a influência de extratos etanólicos de folhas frescas e secas, pseudofrutos, sementes, cascas e raízes da planta invasora Hovenia dulcis Thunb. Na germinação de sementes e no desenvolvimento de plântulas da árvore nativa Parapiptadenia rigida (Benth.) Brenan. Órgãos adultos e jovens frescos de H. dulcis foram extraídos por maceração, enquanto os extratos do material vegetal seco e pulverizado correspondentes foram obtidos por percolação com soxhlet. Os parâmetros germinação, índice de velocidade de emergência (IVE), comprimento e massa seca de radículas e hipocótilos de P. rigida foram avaliados sob a influência de extratos de H. dulcis nas concentrações de 0, 25, 50, 75 e 100 mg mL-1. Os extratos de materiais vegetais frescos proporcionaram rendimentos que variaram entre 5,7 e 9,7%, enquanto os extratos de órgãos secos apresentaram valores que variaram de 14,0 a 35,5%. A atividade alelopática dos extratos sobre P. rigida diferiu de acordo com o órgão vegetal da espécie doadora e mostrou-se dependente da concentração, além de ser influenciada pelo estado do material vegetal extraído. Os efeitos alelopáticos dos extratos de H. dulcis sobre P. rigida afetaram diferentes estágios de seu desenvolvimento e foram causados por aleloquímicos presentes em órgãos vegetais distintos.

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Biografia do Autor

Dane Block Araldi, Universidade Federal de Santa Maria

Carlos Garrido Pinheiro, Universidade Federal de Santa Maria

Ervandil Corrêa Costa, Universidade Federal de Santa Maria

Danilo Boanerges Souza, Universidade Federal de Santa Maria

Berta Maria Heinzmann, Universidade Federal de Santa Maria

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Publicado

26-06-2025

Como Citar

ARALDI, Dane Block; PINHEIRO, Carlos Garrido; COSTA, Ervandil Corrêa; SOUZA, Danilo Boanerges; HEINZMANN, Berta Maria. Interferência alelopática de extratos de Hovenia dulcis na germinação e desenvolvimento de Parapiptadenia rigida. Pesquisa Florestal Brasileira, [S. l.], v. 45, 2025. DOI: 10.4336/2025.pfb.45e202102237. Disponível em: https://pfb.sede.embrapa.br/pfb/article/view/2237. Acesso em: 19 jul. 2025.

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