Morphological effects at radicle level by direct contact of invasive Acacia dealbata link.

摘要: Abstract Seeds of Lactuca sativa L. (model plant) and Quillaja saponaria Mol. (native tree) were subjected to germination in direct contact with leaves, pods seeds from invasive Acacia dealbata Link. (Fabaceae) reveal whether morphological changes occur at radicle level. Bioassays carried out plant material deposited underneath A. s canopy under natural conditions Mediterranean ecosystem South America. Segments tip, cell elongation zone root hair analyzed scanning electron microscopy. The three parts inhibited the formation hairs altered rhizodermis (deformation tissue destruction) two recipient species. In case Q. , an increase thickness was observed internal tissues up vascular cylinder intensely damaged. cap meristematic region suffered structural damage resulting leaves pods. All effects have been attributed impact caused level by potential allelochemicals released different tested materials . These results suggest that produced may pose a threat growth survival