Invasive Species Compendium

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Abstract Full Text

Determination of intensity of seed inhibitory dormancy by lactuca test.

Abstract

Lettuce, as a plant that germinates readily and promptly, is used as an indicator to determine the intensity of inhibitory dormancy and the effect of dissolved pulp of four selected species on germination. Cotoneaster (Cotoneaster horizontalis), holly (Ilex aquifolium), Chinese juniper (Juniperus chinensis) and wild rose (Rosa canina) were the species characterized by combined dormancy with the presence of inhibitory substances in the fleshy coat. The study confirmed the presence of inhibitory substances in the pulp in all the analysed species. The pulp of holly and Chinese juniper completely blocked the germination rose pulp to a lower extent, and cotoneaster pulp to the lowest extent. The proof of the effect of inhibitors on lettuce seed was also in the direct proportion of the germination results and the applied concentration.