Allelopathic activity of extracts of Citharexylum spinosum L. from Tunisia.

Author(s) : El-Ayeb-Zakhama, A.; Harzallah-Skhiri, F. Author Affiliation : Laboratory of Genetic Biodiversity and Valorisation of Bioressources (LR11ES41), High Institute of Biotechnology, University of Monastir, Tahar Haddad street, Monastir 5000, Tunisia. Author Email : ayeb.asma@gmail.com Journal article : Journal of Plant Breeding and Crop Science 2016 Vol.8 No.10 pp.189-196 ref.50 Abstract : Allelopathic potential of Citharexylum spinosum L. (Verbenaceae) an exotic tree introduced in Tunisia many years ago was evaluated. Organic extracts using hexane, ethyl acetate and methanol solvents together with aqueous extracts at different concentrations were prepared from different parts of the plant (roots, stems, leaves and flowers). Yields in the 12 organic extracts together with their phenol contents were reported. Leaves methanol extract showed the highest yield and amount in total phenols (6.43%; 617.93±1.12 mg gallic acid equivalent/100 g MS, respectively). All extracts were tested on germination and early growth of two crops: (Lactuca sativa L.) and (Triticum aestivum L.) and two weeds: (Peganum harmala L.) and (Silybum marianum L.). Twelve parameters were established and used to the principal components analysis (PCA) and the hierarchical clusters (HCA) analysis. Three groups of extracts were separated according to their allelopathic potentiality. Almost of organic extracts were totally opposed to seed germination of peganum and thistle. ISSN : 2006-9758 URL : http://academicjournals.org/journal/J... Record Number : 20173026164 Publisher : Academic Journals Location of publication : Lagos Country of publication : Nigeria Language of text : English Language of summary : English Indexing terms for this abstract: Organism descriptor(s) : Citharexylum spinosum, Lactuca sativa, Peganum harmala, plants, Silybum marianum, Triticum, Triticum aestivum Descriptor(s) : allelopathy, chemical composition, cluster analysis, flowers, herbicidal properties, introduced species, leaves, lettuces, non-wood forest products, phenolic compounds, plant composition, plant extracts, principal component analysis, roots, stems, weeds, wheat Identifier(s) : chemical constituents of plants, exotic organisms, exotic species, introduced organisms, minor forest products, non-indigenous organisms, non-indigenous species, non-native organisms, non-native species, non-timber forest products, nonindigenous organisms, nonindigenous species Geographical Location(s) : Tunisia Broader term(s) : Citharexylum, Verbenaceae, Lamiales, eudicots, angiosperms, Spermatophyta, plants, eukaryotes, Lactuca, Asteraceae, Asterales, Peganum, Zygophyllaceae, Sapindales, Silybum, Triticum, Poaceae, Poales, commelinids, monocotyledons, Developing Countries, Francophone Africa, Africa, Maghreb, North Africa, Mediterranean Region, Threshold Countries