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Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945versão On-line ISSN 1806-9967

Resumo

COELHO, Ruimário Inácio; CARVALHO, Almy Júnior Cordeiro de; THIEBAUT, Jose Tarcisio Lima  e  LOPES, José Carlos. Bud sprouting in stem sections of 'smooth cayenne' pineapple plant treated with growth regulators. Rev. Bras. Frutic. [online]. 2009, vol.31, n.1, pp.203-209. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452009000100028.

The ex-vitro propagation of the pineapple plant cv Smooth Cayenne was evaluated using the stem sections treated with Giberelic acid (GA3) and 6 benzylaminopurine (BAP). The design utilized was the fractionated factorial of the type (1/5)53 with sizes of stem sections, GA3, BAP and five levels totalizing 25 treatments that consisted of the combination of different length of section (6, 8, 10, 12 and 14 cm) and concentrations (0, 100, 200, 300 and 400 mg L-1) of GA3 and BAP. Each plot consisted of 50 sections treated through immersion for one minute in solutions containing different combinations of GA3 e BAP concentrations. BAP had positive and GA3 negative effect on the percentage of buds sprouting in stem sections at 28 days after planting. The section size, GA3 and BAP application affected the number of buds sprouting per stem section. It was verified the effect on the following characteristics: shoot height, fresh and dry weight of the seedlings and dry weight of root evaluated 123 days after being planted in answer of the section size, GA3 and BAP. However, only stem section size presented a positive effect. The highest values of fresh and dry weight of the seedlings were obtained without BAP and GA3 in stem sections of 14 cm long.

Palavras-chave : Ananas comosus var. comosus; propagation; IBA; BAP.

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