Propagação in vitro e aclimatização da planta ornamental de folhagem Alocasia reversa N.E.Br. usando explantes de segmentos de microbulbos e supressão de contaminantes bacterianos por irradiação ultravioleta-C
DOI:
https://doi.org/10.1590/2447-536X.v32.e323012Palavras-chave:
Benzilaminopurina, brotos adventícios, crescimento de mudas, cobertura plástica transparente, thidiazuronResumo
Neste estudo, desenvolveu-se uma estratégia eficaz de propagação in vitro para Alocasia reversa N.E.Br. utilizando explantes de segmentos de microbulbos e a supressão de contaminantes bacterianos usando luz ultravioleta C (UV-C). Foram realizados vários passos, incluindo a iniciação de brotos, formação de brotos adventícios a partir de segmentos de microbulbos, supressão da contaminação bacteriana com UV-C e o crescimento das mudas até a aclimatização. A iniciação de brotos foi ótima em ambos os meios Murashige Skoog (MS) e ½ MS suplementados com 1,0 mg L-1 de Thidiazuron (TDZ) e 0,5 mg L-1 de N6-Benzilaminopurina (BAP). O meio ideal para a indução de brotos adventícios a partir de microbulbos foi MS suplementado com 0,75 mg L-1 de TDZ e 0,5 mg L-1 de BAP. Por outro lado, o meio com MS, 0,75 mg L-1 de TDZ e 0,75 mg L-1 de BAP resultou na iniciação de brotos mais rápida e na maior formação de brotos adventícios. Na supressão bacteriana durante a cultura in vitro, a irradiação intermitente de 1 hora com UV-C foi mais eficaz para eliminar contaminantes bacterianos do que irradiações mais longas. Foi registrado o aumento das mudas; o melhor broto foi produzido em MS com 1 mg L-1 de BAP, enquanto, para promoção raízes, ½ MS foi suficiente. Finalmente, a aclimatização com o tratamento de cobertura plástica transparente apresentou alto desempenho. A série de protocolos para propagação usando segmentos de microbulbo in vitro, manejo de contaminantes bacterianos e métodos simples de aclimatização, pode ser usada como referência para o cultivo de A. reversa. Palavras-chave: Benzilaminopurina, brotos adventícios, crescimento de mudas, cobertura plástica transparente, thidiazuron.
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Copyright (c) 1969 Sri Rianawati, Eka Fibrianty, Fitri Rachmawati, Dewi Pramanik, Taufiq Hidayat Rahman Side, Fitrahtunnisa

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