-a. Aechmea miniata seed capsule; b. seeds of A. miniata in culture medium; c. seeds of A. miniata after 15 days in culture medium; d. sprouts of A. miniata in culture medium with 4.44 μM BAP; e. A. miniata seedlings in rooting medium; f. Aechemea sp seedlings at 180 days of substrate cultivation. (Scale bar: 0.5 cm).

-a. Aechmea miniata seed capsule; b. seeds of A. miniata in culture medium; c. seeds of A. miniata after 15 days in culture medium; d. sprouts of A. miniata in culture medium with 4.44 μM BAP; e. A. miniata seedlings in rooting medium; f. Aechemea sp seedlings at 180 days of substrate cultivation. (Scale bar: 0.5 cm).

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Resumo Este trabalho teve o objetivo de avaliar a resposta morfogênica da micropropagação de Aechmea miniata e Aechmea blanchetiana após diferentes tratamentos com citocinina e auxinas. O estabelecimento in vitro se deu a partir de sementes de plantas adultas, com aproximadamente 2 anos de idade. Após descontaminação as sementes foram inoculadas em...

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Context 1
... estabelecimento in vitro foi realizado a partir de cápsulas de sementes de A. miniata e A. blanchetiana coletadas de plantas com aproximadamente 2 anos de idade, logo no início da deiscência dos frutos (Fig. 1a), no Banco Ativo de Germoplasma de plantas ornamentais da Empresa Baiana de Desenvolvimento Agrícola (EBDA), localizada no município de Salvador, Bahia, ...
Context 2
... em álcool 70 % durante 1 minuto, seguido de solução de hipoclorito de sódio com 2 % de cloro ativo por 15 minutos e posteriormente foram lavadas duas vezes em água destilada estéril. Após a descontaminação as sementes foram transferidas para frascos de vidro (100 × 70 mm) contendo 25 mL do meio de cultura MS (Murashige & Skoog 1962) (Fig. 1b), suplementado com 30 g L -1 de sacarose e 7 g L -1 de ágar, e pH ajustado para 5,7 ± 0,1 antes da esterilização em autoclave à temperatura de 120 ºC e pressão de 1 kgf cm -2 durante 15 ...
Context 3
... com temperatura de 25 ± 2 ºC, densidade de fluxo de fótons de 60 μmol m -² s -1 e fotoperíodo de 16 h. A cada dois dias, foram avaliados o número de sementes germinadas, até que este se tornasse constante. Foram consideradas como germinadas todas as sementes em que ocorreu a protusão da radícula e posteriormente formaram plantas normais (Fig. 1c). Após 50 dias de cultivo, foi Rodriguésia 72: e01322018. 2021 determinada a porcentagem de germinação. Para cada espécie foram utilizadas 4 repetições, sendo que cada repetição constou de um frasco contendo 50 sementes, totalizando 200 sementes por espécie. Para a fase de multiplicação, em câmara de fluxo laminar, segmentos caulinares ...
Context 4
... foram realizados 5 subcultivos, totalizando 225 dias, com intervalo de 45 dias entre subcultivos. Em cada subcultivo, os explantes foram individualizados e novamente isolados de modo que ficassem com aproximadamente 5 mm de altura, e em seguida, inoculados em meio fresco, suplementado com a mesma concentração de BAP do meio de cultura de origem (Fig. 1d). Ao final do 5º subcultivo, foi avaliado o número total de brotos / explante, altura de brotações (cm), número de raízes, e comprimento das raízes (cm). Cada tratamento foi composto por 40 repetições, sendo que cada unidade experimental constituiu-se de 1 explante por tubo de ...
Context 5
... (MS0), foram transferidas para tubos de ensaio (25 × 150 mm) contendo 15 mL de meio de cultura MS com metade da concentração salina de macronutrientes, acrescido isoladamente com ácido indol-butírico (AIB) ou ácido naftalenoacético (ANA) nas concentrações 1, 2 ou 3 μM, mais um tratamento controle, isento de auxina, totalizando 14 tratamentos (Fig. 1e). O pH do meio de cultura foi ajustado para 5,7 ± 0,1 antes da esterilização em autoclave à temperatura de 120 °C e pressão de 1 kgf cm -2 durante 15 minutos. Após a transferência, as culturas foram mantidas em sala de crescimento com temperatura de 25 ± 2 ºC, densidade de fluxo de fótons de 60 μmol m -² s -1 e fotoperíodo de 16 h. Após ...
Context 6
... tratamentos de enraizamento sobre a aclimatização, plantas de A. miniata e A. blanchetiana foram removidas da condição in vitro e tiveram suas raízes lavadas para a retirada do meio de cultura, em seguida foram transferidas para bandejas de polipropileno de 200 células, com dimensões de 5 × 5 × 9 cm, contendo substrato plantmax hortaliças HT ® (Fig. 1f) ...

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... Contrasting with this research, the in vitro propagation of Aechmea miniata and Aechmea blanchetiana explants resulted in a greater number of shoots when the concentration of BAP was increased. However, this increase had a reverse effect on the number and length of roots and the height of the plants obtained (GARCIA et al., 2021). Data like this reinforces the idea that the response of explants to the growth regulator is variable and depends on the phytohormonal characteristics of each species. ...
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