The plant growth regulator play important role on seed germination due to its
interferance on gene expression regulation during the metabolism reactivation. This work had the
objective to evaluate plant growth regulators effects on super sweet corn seeds germination and
seedlings vigor. The experiment was carried out at the São Paulo State University (UNESP),
Botucatu-SP, Brazil. Treatments used were: gibberellic acid (GA3) 50mgl-1, 100mgl-1, cytokynin
(PBA) 50mgl-1, 100mgl-1; GA3 50mgl-1 + PBA 50mgl-1, GA3 100mgl-1 + PBA 100mgl-1 and the
control (water). The seeds were germinated in gerboxes, on two layers of germitest paper soaked
on 12,5ml of the solutions described above, and placed in germination chambers, at 25oC. Each
treatment had four replications of 50 seeds. The experimental design was totally randomized for
the two environmets. Primary root length was evaluated four days after germination. Seven and
ten days after sowing normal seedlings were counted. At these occasions shoot and root fresh and
dry matters. Were also evaluated. Seedling emergence and speed emergence index were determined
in field normal avaluations. Results showed that GA3 treatment provided better germination and
larger number of emerged seedlings at the first count, increased shoot fresh matter at the first
count and higher emerged seedling uniformity in sand. This indicates the favorable effects of GA3
on super sweet corn seed germination speed and percentage.