Aplicação de melatonina e sacarose no prolongamento da vida de vaso de flores de corte de amarilis (Hippeastrum hybridum Herb)
DOI:
https://doi.org/10.1590/2447-536X.v29i4.2670Palavras-chave:
compostos fenólicos, fitoregulador, longevidade de flores, vida de vasoResumo
O presente trabalho investigou os efeitos da aplicação de melatonina individualmente e misturada com solução de sacarose na vida de vaso e nas alterações físico-químicas de flores de corte de amarílis. Hastes de amarilis com botões florais em pontos de colheita foram colocadas em vasos contendo diferentes soluções de manutenção: Melatonina (Mt; 0,01 mM), Sacarose (Suc; 4%), Melatonina + Sacarose (Mt + Suc; 0,01 mM + 4%) e Água destilada (Controle). Cada tratamento constou de 5 repetições, sendo uma haste de inflorescência por vaso. Os vasos permaneceram a 22 ± 3° C e iluminação constante de 13 µmol m-2.s-1 durante 14 dias. A imersão das hastes em Suc ou Mt + Suc retardou os processos iniciais de senescência de flor de corte de amarílis, prolongando por mais 2 dias sua vida de vaso, em relação às hastes sem uso desses conservantes (controle). Aumentando de 10 para 12 dias de conservação. Pois mantiveram mais estáveis a massa fresca, retardaram a degradação de pigmentos antocianinas e flavonoides, bem como, mantendo a estabilidade dos compostos fenólicos e carboidratos totais ao final de 14 dias. Esses achados confirmam o papel da melatonina como conservante de flores de corte. Todavia, o seu efeito conservante foi potencializado em amarílis, associado à sacarose. Mais trabalhos necessitam ser realizados para investigar mais profundamente quais mecanismos fisiológicos promovidos pela interação melatonina e sacarose na regulação da senescência das flores de amarilis cortadas, incluindo análise de expressão de genes e atividade do sistema antioxidante.
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Copyright (c) 2023 Fred Augusto Lourêdo de Brito, Nilo Ricardo Corrêa de Mello Júnior, Lady Daiane Costa de Sousa Martins, Mayara Bernardo Tavares Martim, Luzia Ferreira da Silva, Thamilla Menezes Guerra, Adriano do Nascimento Simões
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
