tipo de ramo e efeito do ácido indal acético (aia) no estabelecimento in vitro de três cultivares de mirtilo branch type and the effect of indole acetic acid (iaa) on in vitro establishment of three blueberry cultivars
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ID: 150764
2008
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Abstract
O mirtilo é uma promissora alternativa econômica que se adapta muito bem a pequenas propriedades. No entanto, o preço e a disponibilidades das mudas é o principal entrave desta atividade. A micropropagação é a técnica que vem sendo utilizada com sucesso para propagação de mudas de mirtilo. Com o objetivo de estabelecer in vitro cultivares de mirtilo (Vaccinium ashei Reade) para a micropropagação, foram realizados dois experimentos. No experimento I, testou-se a fonte de explante, (segmentos nodais retirados de ramos herbáceos lenhosos) em três cultivares de mirtilo. No experimento II verificou-se o comportamento dos explantes originados de ramos herbáceos na presença e ausência do regulador de crescimento AIA adicionado ao meio de cultivo, dentre sete cultivares. Aos 7, 14 e 21 dias de cultivo avaliou-se a percentagem de contaminação fúngica e bacteriana, além da percentagem de explantes oxidados. Aos 30 e 45 dias de cultivo, além das variáveis analisadas anteriormente, foi avaliado a sobrevivência e o estabelecimento dos explantes. Os resultados permitiram concluir que explantes originados de ramos herbáceos apresentaram menor oxidação fenólica e baixa percentagem de contaminação fúngica e bacteriana, proporcionando um elevado índice de estabelecimento para as cultivares testadas. A adição do regulador de crescimento AIA no meio de cultivo favoreceu o estabelecimento in vitro de mirtilo (Vaccinium ashei Reade).
Blueberry is a promising economic alternative that adapts very well in small farms. Nevertheless, the seedlings price and availability are the major obstacles of this field. Micropropagation is the more successful used technique for blueberry propagation. Therefore, two trials were carried aiming to establish in vitro some cultivars of 'blueberry' (Vaccinium ashei Reade) for further micropropagation. In the first trial, the source of explant of three cultivars was tested (nodal segments from herbaceous and woody branches). In the second trial, seven cultivars were assessed regarding to their explants behavior of herbaceous branches in the presence or non-presence of growth regulator (IAA) in the culture medium. At 7t, 14th and 21st day of cultivation the percentage of fungal and bacterial contamination and explants oxidation percentage were assessed. At 30th and 45th day of cultivation it was evaluated the explants survival and establishment, besides the variables assessed previously. The explants originated from herbaceous branches showed less phenolic oxidation and low percentage of fungal and bacterial contamination, providing high rates of in vitro plant establishment for the cultivars tested. The addition of IAA in the culture medium suited the in vitro establishment of blueberry (Vaccinium ashei Reade).
Blueberry is a promising economic alternative that adapts very well in small farms. Nevertheless, the seedlings price and availability are the major obstacles of this field. Micropropagation is the more successful used technique for blueberry propagation. Therefore, two trials were carried aiming to establish in vitro some cultivars of 'blueberry' (Vaccinium ashei Reade) for further micropropagation. In the first trial, the source of explant of three cultivars was tested (nodal segments from herbaceous and woody branches). In the second trial, seven cultivars were assessed regarding to their explants behavior of herbaceous branches in the presence or non-presence of growth regulator (IAA) in the culture medium. At 7t, 14th and 21st day of cultivation the percentage of fungal and bacterial contamination and explants oxidation percentage were assessed. At 30th and 45th day of cultivation it was evaluated the explants survival and establishment, besides the variables assessed previously. The explants originated from herbaceous branches showed less phenolic oxidation and low percentage of fungal and bacterial contamination, providing high rates of in vitro plant establishment for the cultivars tested. The addition of IAA in the culture medium suited the in vitro establishment of blueberry (Vaccinium ashei Reade).
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silva2008cinciatipo
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| Authors | ;Luciane Couto da Silva;Márcia Wulff Schuch;Joseane Almeida de Souza;Alan Cristiano Erig;Luis Eduardo Corrêa Antunes |
| Journal | Trials |
| Year | 2008 |
| DOI |
10.1590/S0103-84782008000200036
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| URL | |
| Keywords | Keywords not found |
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