Reguladores vegetais e teores endógenos de poliaminas durante o desenvolvimento de taro cultivado in vitro
Carregando...
Data
2008-08-01
Autores
Francisco, Adriana Alice [UNESP]
Tavares, Armando Reis
Kanashiro, Shoey
Ramos, Paulo Roberto Rodrigues [UNESP]
Lima, Giuseppina Pace Pereira [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Santa Maria (UFSM)
Resumo
Neste trabalho foi investigada a assepsia para obtenção de explantes oriundos de tubérculos e a ação das poliaminas espermidina e espermina exógenas associadas aos reguladores vegetais AIA e BA no desenvolvimento, na tuberização in vitro e nos níveis endógenos de putrescina (Put), espermidina (Spd) e espermina (Spm) de taro (Colocasia esculenta). Plantas crescidas em meio contendo espermidina e espermina mostraram tuberização e a associação dessas poliaminas com AIA e BA induziu aumento do número de brotações. Para o estímulo da rizogênese, não foi necessário o uso de reguladores vegetais. Altos teores de putrescina foram encontrados durante a emissão de brotações, enquanto que altos teores de espermidina foram observados durante a formação de rizomas in vitro.
The present research investigated the asepsis for attainment of explants deriving of tubers and the polyamines espermidine and espermine exogenous effects associated with the plant growth regulators NAA and BA on the development and tuberization in vitro and the endogenous levels of putrescine (Put), spermidine (Spd) and spermine (Spm) of taro (Colocasia esculenta). Plants grown in the medium with spermidine and spermine showed tuberization and the association of these polyamines with NAA and BA increases number of shoots. Plant growth regulators were not necessary for root initiation. High levels of endogenous Put were found during the shoot emission, while high levels Spd were observed during in vitro root formation.
The present research investigated the asepsis for attainment of explants deriving of tubers and the polyamines espermidine and espermine exogenous effects associated with the plant growth regulators NAA and BA on the development and tuberization in vitro and the endogenous levels of putrescine (Put), spermidine (Spd) and spermine (Spm) of taro (Colocasia esculenta). Plants grown in the medium with spermidine and spermine showed tuberization and the association of these polyamines with NAA and BA increases number of shoots. Plant growth regulators were not necessary for root initiation. High levels of endogenous Put were found during the shoot emission, while high levels Spd were observed during in vitro root formation.
Descrição
Palavras-chave
Colocasia esculenta, putrescina, espermidina, espermina, Araceae, Colocasia esculenta, putrescine, spermidine, spermine, Araceae
Como citar
Ciência Rural. Universidade Federal de Santa Maria (UFSM), v. 38, n. 5, p. 1251-1257, 2008.