Germinação de sementes de jenipapeiro submetidas à pré-embebição em regulador e estimulante vegetal

Abstract

This work aimed to evaluate the genipap (Genipa americana L.) seed germination and its initial seedling growth, submitted to pre-soaking in regulator and vegetal stimulant. It was arranged in a randomized design with four repetitions of 25 seeds and eight treatments, in which seeds were impregnated for 12 hours: T1 - water, T2 – Liquid gibberellins 4% GA3 (GA3 4% L) (50 mL L-1), T3 – (GA3 4% L) (100 mL L-1), T4 – (GA3 4% L) (200 mL L-1), T5 – (GA3 4% L) (300 mL L-1), T6 – (GA3 4% L) (400 mL L-1), T7 - Stimulate® (5 mL L-1) e T8 - Stimulate® (10 mL L-1). The seeds were disposed on a paper, previously wet with distilled water and taken to the germinator chamber adjusted in 28ºC. There were evaluated the germination percentage, roots length, hypocotyls, and seedling 21 days after the seeding and the Germination Velocity Index. The results had shown that the genipap's seed pre-soaking for 12 hours in GA3 4% L (50, 10 e 200 mL L-1) e Stimulate® (10 mL L-1), provides a higher germination velocity index. The Stimulate® 10 mL L-1, in pre-soaking for 12 hours provides a higher root growth and increase the number of genipap seedlings, comparing with others treatments.