Find in Library

<i>Enterolobium cyclocarpum</i> and <i>Piscidia piscipula</i> are two important tree Fabaceae species distributed from the Yucatan Peninsula, Mexico. Our aims were focused on the <i>E. cyclocarpum</i> and <i>P. piscipula</i> seeds for: (1) to examine the seed permeability and imbibition rate, (2) to evaluate the effect of seed pre-germinative treatments, and (3) to characterize the structures involved on the presence of physical dormancy (PY). We used fresh seeds to determine seed permeability and imbibition rate, seed viability by means of tetrazolium test, furthermore, we applied mechanical scarification and boiler shocks for 5 s, 10 s and 15 s treatments. Morphological characterization of the seed coat was by Scanning Electron Microscope (SEM). Seed viability in <i>E. cyclocarpum</i> and <i>P. piscipula</i> were 100% and 96%, respectively. Seed permeability and imbibition rate in <i>E. cyclocarpum</i> were low. The highest germination in <i>E. cyclocarpum</i> was in the mechanical scarification (92%), while in <i>P. piscipula</i>, this parameter was in the 10 s boiling water treatment (76.0%). The presence of PY was confirmed in both species because they showed low seed permeability, and imbibition rate; furthermore, exhibited macrosclereids cells. The present research seeks to promote the sustainable use of <i>E. cyclocarpum</i> and <i>P. piscipula</i>.