Effect of seed storage time on germination and survival of Ferocactus townsendianus Britt Rose/Efecto del tiempo de almacenamiento de la semilla en la germinación y sobrevivencia de Ferocactus townsendianus Britt Rose/Efeito do tempo de armazenam ento da semente na germinacao e sobrevivencia de Ferocactus townsendianus Britt Rose

The 'biznaga' (Ferocactus townsendianusj are an important vegetative component in Baja California Sur, Mexico, which has been seriously affected by human activities. Therefore, reductions of this specie in natural population have been presented. Viability and seed germination is needed to ensure the prevalence of this species. Cacti seeds present in the laboratory a reduction of their viability that differs between species. The main objective of this study was to evaluate the effect of seed storage time on the germination and survival of F. townsendianus. Seeds were collected and used during the years 2003, 2004, 2010, 2012 and 2013 and placed in Petri dishes, each containing 20 seeds at the rate of five dishes per year. Germination (%), germination rate index, germination time and survival (%) were assessed. A lower germination (P0.35), average time of germination (P>0.97) and the percentage of seedling survival (P>0.07). The results suggest feasibility and convenience of F. townsendianus seed storage, which could increase their germination levels upon subjecting them to adequate temperature and light treatments.