In this research experiments were accomplished with two classes of vegetable hormones (gibberellin and
cytokinin); with the objective of verifying the effect of gibberellic acid and 6-Benzylaminopurine (GA
3 and
BAP) on the lignification and the longitudinal growth in seedlings of
Eucalyptus grandis
. The experiment
was accomplished greenhouse, where were the growth regulators combined or isolated applied, in the
following concentrations: GA
3 (49.13 μM e 98.26 μM); BAP (111 μM e 222 μM), with five repetitions for
each treatment. The comparisons among the averages of the height of the plants to the 6 months showed
that the most pronounced prolongations of the stem corresponded to the treatments G
[2], G
[2]C
[1] and G
[2]
C
[2] where the largest concentration of GA
3 was used. In the treatment G
[1]C
[1] where it was combined to
smallest concentration of GA
3 with to smallest concentration of BAP (49,13 μM de GA
3 + 111 μM de BAP),
it happened the smallest lignin tenor 23,37%.
