reguladores vegetais e teores endógenos de poliaminas durante o desenvolvimento de taro cultivado in vitro plant growth regulators in polyamines endogenous levels during the development of taro cultivated in vitro
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2008
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Abstract
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.
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francisco2008cinciareguladores
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| Authors | ;Adriana Alice Francisco;Armando Reis Tavares;Shoey Kanashiro;Paulo Roberto Rodrigues Ramos;Giuseppina Pace Pereira Lima |
| Journal | Trials |
| Year | 2008 |
| DOI |
10.1590/S0103-84782008000500008
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| URL | |
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