Longevidad, latencia y germinación de las semillas de Verbesina greemanii: efecto de la calidad de la luz

Abstract

During a year the longevity of buried and imbibited seeds was studied, also the effect of the spectral composition of the light on seed germination was investigated, on Verbesina greenmanii, a secondary growth plant from thp tropical rain forest. The seed were placed in plant growth chambers with modified light composition, and under natural light conditions in the forest. Other experiments were carried out on the effect of the red (660 nm) and far red light (730 nm). The results show that the seeds may remain dormant in the soil and in imbibed condition. The spectral composition of the light plays an important role on the regulation of seed germination. The seeds are stimulated to germinate by the red light and inhibited by the far red light.