Concentrations of plant regulators in the blanching in vitro of pineapple of the field

Abstract

The ornamental pineaple Ananas comosus (L.) Merr. var. ananassoides (Baker) Coppens & F. Leal, also denominated of pineapple of the field or it crowns green it is a plant still little explored economically in spite of the ornamental potential as " cut flower ". Studies about the propagation of the pineapple of the field are scarce, in this sense, the micropropagation of this can represent a progress for the commercial production of the species. The objective of the work was to evaluate the different combinations of 6-BAP and GA₃ in the multiplication and development of the explants of Ananas comosus (L.) Merr. var. ananassoides (Baker) Coppens & F. Leal. The randomized experimental desing was used, with a factorial scheme 4x4 consisting of four concentrations of 6-BAP (0; 0,25; 0,5 and 1,0 mg.L^-1) and four concentrations of GA₃ (0; 0,5; 1,0 and 2,0 mg.L^-1) combined. According to the results, the interaction 1,0 mg.L^-1 of 6-BAP and 0,5 mg.L^-1 of GA₃ provided larger sprouts number. The addition of 6-BAP propitiated a reduction of the bud length and of the roots number of explants. The addition of GA₃ caused a larger length of the aerial part and it didn't influence in the rooting of the explants.