Aqueous grape pomace extract as a sustainable strategy for controlling the germination of Leucaena leucocephala
Abstract
Leucaena leucocephala is an exotic species widely distributed in tropical regions, whose highly competitive potential compromises natural regeneration and highlights the need for sustainable strategies for the management of invasive species. This study aimed to evaluate the allelopathic effects of aqueous grape pomace extracts obtained through two extraction methods (cold and hot) and applied by seed immersion to L. leucocephala at different concentrations (0, 20, 40, 60, 80, and 100 %), in order to assess their potential for controlling seed germination and early seedling growth. Increasing extract concentrations reduced germination, and increased the proportion of abnormal seedlings and the percentage of non-germinated seeds. Growth variables exhibited a biphasic response, with stimulation at intermediate concentrations (50-60 %) and inhibition at higher concentrations (> 80 %). The hot extraction method showed a greater inhibitory effect, which was associated with higher total phenolic compounds.
KEYWORDS: Vitis vinifera, allelopathy, invasive species.
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