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Allelopathic Effects of Four Plant Species on Lettuce Seed Germination and Seedling Growth

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Document pages: 7 pages

Abstract: Allelopathy is an inherent feature of a number of plant species. The aim of this study was to investigate the individual and relative allelopathic potential of four plant species: Parthenium (Parthenium hysterophorus L.), Tamarindus (Tamarindus indica), Litchi (Litchi chinensis) and Citharexylum (Citharexylum spinosum L ). The experiment was set up using the sandwich multi-well method, with Lettuce as the test species. The multi-well protocol is a standardized widespread and commonly used bioassay technique to study allelopathy. Leaf litter was used as plant material giving that the selected species contain or are supposed to contain allelochemicals on their leaves but also for comparison sake. This experiment will fill the gap of the current knowledge regarding the allelopathic potential of species investigated especially Litchi and Citharexylum, but will also provide a rating of the relative phytotoxicity of each of them. We might be able to determine which of the four plants exhibits the highest allelopathic potential. It is equally expected that each of these species displays some level of allelopathy.

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