EFEITO DA TEMPERATURA E DA LUZ NAS SEMENTES DE COPAIFERA LANGSDORFII DESF.

• Main Authors: Maria Elane de Carvalho Guerra, Sebastião Medeiros Filho, Elizita Maria Teófilo
• Format: Article
• Language: English
• Published: Universidade Federal Rural do Semi-Árido 2006-01-01
• Series: Revista Caatinga
• Online Access: http://www.redalyc.org/articulo.oa?id=237117486005

Copaifera langsdorfii is a typical tree species very important for restoration of degraded areas. This study evaluated the effect of different temperatures and light conditions on Copaifera seed germination. The applied treatments were the temperatures of 25ºC, 30ºC and 20-30ºC and three different light expositions (constant dark, 8h of light plus 16h of dark and constant light). The tested variables were percentage, velocity and average time of germination. The treatments consisted of 200 seeds, with four replications of 50 seeds each, sown on a Germitest towel paper and maintained for 28 days on germination chamber. The completely randomized design was used and the averages compared by Tukey test at 5% probability. Germination percentage was not influenced by the treatments. The constant temperatures of 25ºC or 30ºC, independently of light regime, promoted a higher rate of germination velocity and caused the reduction of the germination average time.