Luminosidade como fator indutor na germinação de Schizolobium parahyba var. amazonicum (Hub.) Ducke

Abstract

The present work aimed to analyze the germination of seeds of Schizolobium parahyba var. amazonicum (Hub.) Ducke scarified and uncured under different lighting conditions. In October 2016 seeds and fruits of Schizolobium parahyba var. Amazonicum (Hub.) Ducke in the R7 reserve, from Sinop / MT municipality, then sent to the seed analysis laboratory of the Federal University of Mato Grosso, Sinop campus, benefiting and analyzed. The treatments consisted of mechanical chiseling with sandpaper and the process of asepsis of the seeds, submitted to light treatments 1) extreme red, 2) red, 3) dark and 4) control, being 4 replicates with 25 seeds each, at a constant temperature of 30ºC in the germination greenhouse, in photoperiod 10-14 hours of light. The percentage of germination and Germination Speed Index (IVG) were analyzed. Statistical analyzes performed in the SISVAR program, when analyzes of variance (Test F) were significant, the comparisons between the means of the treatments were by the Tukey test, both at the 5% probability level. The seeds of S. amazonicum can be classified as neutral photoblastic seeds. The highest percentages of germination for scarified and non-scarified seeds were for extreme red (81% and 53%, respectively) and red (49% for scarified and 12% for nonscarified) treatments. The highest values of IVG were found for the extreme red treatment (9.1 seeds / day for scarified seeds and 1.74 seeds / day for non -scarified). Statistically there was no difference between the IVG values for the non-scarified seeds.