EFEITO DA ALELOPATIA INTRAESPECÍFICA DA ESPÉCIE LEUCENA LEUCOCEPHALA (LAM.) DE WIT (FABACEAE) DURANTE A GERMINAÇÃO E O DESENVOLVIMENTO INICIAL

Abstract

Allelopathy is an interaction between plants that can benefit or hinder the development of neighboring plants through the allelochemicals that are synthesized in different organs. Allelopathy can occur interspecifically or intraspecifically. Thus, the objective of this work was to verify the autoallelopathic potential of the invasive exotic Leucaena leucocephala (Lam.) of Wit on its germination and initial development. Leaves were processed with distilled water (1:20 m/v). From the crude extract, dilutions were made at concentrations of 50 and 25%. The osmotic potential of the crude extract was simulated. The experiment was carried out with 5 replicates of 20 seeds set to germinate in Petri dishes with filter paper moistened with 10mL of each solution evaluated. The parameters were evaluated after 10 days of experiment. Data were analyzed using ANOVA with Tukey's test, a posteriori. The results demonstrate that L. leucocephala has autoallelopathic potential evidenced through p<0.05 for T50 and Synchrony. Although the allelopathic extract did not affect the germination of the species (p=0.25). This is due to the parameter not being sensitive to allelochemicals. As for early development, L. leucocephala does not affect its own seedlings. Thus, the species may have a seedling bank, in which the seeds germinate less synchronized, reducing intraspecific competition and corroborating its invasive success.