Ciência Rural ()

Diazotrophic bacteria and nitrogen fertilization on the growth of micropropagated pineapple plantlets during acclimatization

  • Aurilena de Aviz Silva,
  • Almy Junior Cordeiro de Carvalho,
  • Flávia Paiva de Freitas,
  • Patrícia Gomes de Oliveira Pessanha,
  • Paulo Cesar dos Santos,
  • Mírian Peixoto Soares da Silva,
  • Tábatha de Souza Vasconcelos,
  • Fábio Lopes Olivares

DOI
https://doi.org/10.1590/0103-8478cr20141338
Journal volume & issue
Vol. 46, no. 11
pp. 1952 – 1958

Abstract

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ABSTRACT: This study examines the effect of inoculation with diazotrophic bacteria and nitrogen fertilization on the growth of micropropagated pineapple cv. 'Vitória' plantlets during the acclimatization period. The experiment was carried out in a greenhouse in Campos dos Goytacazes, in randomized blocks, using a 2x5x5 factorial scheme, with the factors being two types of inocula (absence or presence of a mixture of diazotrophic bacteria that contained Burkholderia sp. UENF 114111, Burkholderia silvatlantica UENF 11711, and Herbaspirillum seropedicae HRC 54), five levels of urea (0, 2, 5, 7, and 10g L-1), and five evaluation periods (30, 60, 90, 120, and 150 days following the planting of plantlets in trays), and with four replications of each treatment. An increase in the dried weight of shoots and roots of micropropagated pineapple cv. 'Vitória' plants depended on inoculation with diazotrophic bacteria, and plantlets acclimatization could be reduced by up to 57 days, depending on the concentration of urea fertilizer.

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