REGULADORES DE CRESCIMENTO NA FORMAÇÃO DE ESTACAS FOLIARES DE LISIANTHUS (Eustoma grandiflorum SHINN)

Abstract

The lisianthus (Eustoma grandiflorum Shinn) belongs to Gentianacea family. It is a native of the southern United States plant, found mainly in the humid prairies of Nebraska and Colorado. To promote rooting softwood cuttings, the use of growth regulators is a widespread practice and especially in species difficult to root, can enable the production of seedlings through cuttings. With the aim of forming buds on leaf cuttings were used eight plants arrays Lisianthus to obtain the leaf cuttings, the cuttings were immersed in five different concentrations of BAP, comprising the following treatments with twenty repetitions: 0, 0.4; 0.8; 1.2; 1.6 ml l -1 BAP. The solutions were changed every five days to avoid contamination of leaf cuttings. After thirty days, the leaf cuttings were dipped for five minutes in indolebutyric acid (IBA) talc at a concentration of 4000 ppm and buried in the tray containing an average particle size of vermiculite to induce rooting leaf cuttings lisianthus, by evaluating the number of stakes which buds formed, the amount of fresh leaves and length of roots formed. It was found that the doses of BAP had a significant influence in the formation of buds on leaf cuttings of lisianthus.