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      Optimization of a protocol for the micropropagation of pineapple Translated title: Otimização do protocolo de micropropagação do abacaxizeiro

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          Abstract

          The present work aimed at maximizing the number of plantlets obtained by the micropropagation of pineapple (Ananas comosus (L.) Merrill) cv. Pérola. Changes in benzylaminopurine (BAP) concentration, type of medium (liquid or solidified) and the type of explant in the proliferation phase were evaluated. Slips were used as the explant source, which consisted of axillary buds obtained after careful excision of the leaves. A Sterilization was done in the hood with ethanol (70%), for three minutes, followed by calcium hypochlorite (2%), for fifteen minutes, and three washes in sterile water. The explants were introduced in MS medium supplemented with 2mg L-1 BAP and maintained in a growth room at a 16h photoperiod (40 mmol.m-2.s-1), 27 ± 2ºC. After eight weeks, cultures were subcultured for multiplication in MS medium. The following treatments were tested: liquid x solidified medium with different BAP concentrations (0.0, 1.5 or 3.0 mg L-1), and the longitudinal cut, or not, of the shoot bud used as explant. The results showed that liquid medium supplemented with BAP at 1.5 mg L-1, associated with the longitudinal sectioning of the shoot bud used as explant presented the best results, maximizing shoot proliferation. On average, the best treatment would allow for an estimated production of 161,080 plantlets by the micropropagation of the axillary buds of one plant with eight slips and ten buds/slips, within a period of eight months.

          Translated abstract

          O objetivo do trabalho foi maximizar o número de brotações, buscando adequar o protocolo de micropropagação do abacaxizeiro-'Pérola', pela manipulação de concentrações de BAP, do estado físico do meio de cultura e do seccionamento das brotações na fase de proliferação. Mudas do tipo filhote foram utilizadas como fonte de explantes, que se constituíram de gemas axilares extraídas após a eliminação das folhas. A desinfestação procedeu-se com álcool 70% (três minutos) e, posteriormente, com hipoclorito de cálcio 2% (quinze minutos). Em seguida, os explantes foram estabelecidos em frascos contendo 15 mL do meio de cultura MS sólido, suplementado com 2,0 mg L-1 de BAP e permaneceram por 60 dias em câmara de crescimento. Na fase de proliferação, estudaram-se os meios de cultura MS sólido e líquido, as concentrações de BAP (0,0; 1,5 e 3,0 mg L-1) e o seccionamento longitudinal das brotações. Concluiu-se que o meio MS líquido favoreceu a indução de brotações. O seccionamento das brotações mostrou-se fundamental no aumento da taxa de multiplicação, e a concentração 1,5 mg L-1 de BAP promoveu a melhor resposta para o número de brotações. O trabalho demonstrou que se pode obter até 161.080 plântulas de abacaxi, no final de oito meses, partindo de uma única planta com oito filhotes e dez gemas axilares/filhote.

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            Plant propagation by tissue culture - Part 1: The technology

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              Plant propagation by tissue culture, part 1: the technology

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbf
                Revista Brasileira de Fruticultura
                Rev. Bras. Frutic.
                Sociedade Brasileira de Fruticultura (Jaboticabal )
                1806-9967
                August 2002
                : 24
                : 2
                : 296-300
                Affiliations
                [1 ] Universidade Federal da Bahia Brazil
                [2 ] Universidade Federal da Bahia Brazil
                [3 ] USP
                Article
                S0100-29452002000200005
                10.1590/S0100-29452002000200005
                ffbba71d-0623-4e43-be83-715b9be45a7f

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-2945&lng=en
                Categories
                HORTICULTURE

                Horticulture
                Ananas comosus,tissue culture,in vitro culture,in vitro clonal propagation,cultura de tecidos,cultivo in vitro,propagação clonal in vitro

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