Respostas fisiológicas de Aechmea setigera Mart. ex Schult. & Schult. f. (Bromeliaceae) cultivada in vitro

Autores

DOI:

https://doi.org/10.20873/jbb.uft.cemaf.v10n1.silva

Palavras-chave:

Micropropagation, stomatal density, chlorophyll, carbohydrates, phenolic compounds

Resumo

A propagação in vitro de bromélias é amplamente utilizada para produzir plantas visando a conservação. O objetivo desse trabalho foi avaliar as respostas fisiológicas de Aechmea setigera cultivada in vitro sob diferentes concentrações de 6-benzilaminopurina (BAP). O experimento foi conduzido em delineamento completamente casualizado com cinco tratamentos (0; 1,0; 2,0; 4,0 e 8,0 mg L-1 de BAP). Após 90 dias de cultivo in vitro em meio de cultura MS líquido estacionário, foram avaliados parâmetros morfológicos e bioquímicos. O aumento das concentrações de BAP promoveu aumento da densidade estomática, redução do tamanho da planta e do número de raízes, mas aumentou o número de brotos. Existiu efeito significativo entre as doses de BAP e as massas fresca e seca. Elevadas doses de BAP (4,0 e 8,0 mg L-1) promoveu a redução dos teores de clorofila a e total, mas não alterou os teores de clorofila b e carotenóides. As concentrações de amido e carboidratos solúveis diminuíram com o uso de concentrações acima de 2,0 e 4,0 mg L-1 de BAP, respectivamente. O teor de compostos fenólicos totais diminui com o aumento da concentração de BAP. As modificações avaliadas no metabolismo elucidam a plasticidade fenotípica nos processos de multiplicação in vitro de A. setigera.

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Journal of Biotechnology and Biodiversity

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Publicado

01-03-2022

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Silva, T. C. da, Luiz, C., Oliveira, M. T. de, Borghezan, M. ., Pescador, R. ., & Fermino Junior, P. C. P. (2022). Respostas fisiológicas de Aechmea setigera Mart. ex Schult. & Schult. f. (Bromeliaceae) cultivada in vitro. Journal of Biotechnology and Biodiversity, 10(1), 016–025. https://doi.org/10.20873/jbb.uft.cemaf.v10n1.silva