title: Study of allelopathic effects of Eucalyptus erythrocorys L. crude extracts against germination and seedling growth of weeds and wheat.
abstract: Allelopathic materials inside a tree can produce positive or negative change in the survival, growth, reproduction and behaviour of other organisms if they escape into the environment. To assess these effects, this work was carried out to evaluate the allelopathic impact of Eucalyptus erythrocorys L. on seed germination and seedling growth of two weeds: Sinapis arvensis L. and Phalaris canariensis L.; on one cultivated crop: Triticum durum L. Aqueous; and on ethanolic leaf extracts of E. erythrocorys L. The study was effected using four concentrations (10, 20, 25 and 30 μL/mL) while distilled water was used as a control. The results showed that the E. erythrocorys L. crude extracts had an inhibitory effect on seed germination and seedling growth of both studied weeds and wheat. The inhibition rate was increased by the increase in extract concentration. Only ethanolic extracts of E. erythrocorys L. induced a significant inhibition of seed germination of durum wheat. The effect of E. erythrocorys L. crude extracts was more severe on weeds than on durum wheat. These results indicate that the seedling growth, especially radicle elongation, was the more sensitive indicator to evaluate the effects of extracts than was the seed germination.
authors.affiliation: a Laboratoire des Microorganismes et Biomolécules Actives, Faculté des Sciences de Tunis, Département de Biologie , Campus Universitaire , Tunis , Tunisie.|b Laboratoire d'Ecologie et d'Amélioration Sylvo-Pastorale , Institut National de Recherches en Génie Rural , Ariana , Tunisie.
authors.forename: Asma
authors.initials: A
authors.lastname: Ben Ghnaya
authors.affiliation: b Laboratoire d'Ecologie et d'Amélioration Sylvo-Pastorale , Institut National de Recherches en Génie Rural , Ariana , Tunisie.
authors.forename: Lamia
authors.initials: L
authors.lastname: Hamrouni
authors.affiliation: b Laboratoire d'Ecologie et d'Amélioration Sylvo-Pastorale , Institut National de Recherches en Génie Rural , Ariana , Tunisie.
authors.forename: Ismail
authors.initials: I
authors.lastname: Amri
authors.affiliation: b Laboratoire d'Ecologie et d'Amélioration Sylvo-Pastorale , Institut National de Recherches en Génie Rural , Ariana , Tunisie.
authors.forename: Haifa
authors.initials: H
authors.lastname: Ahoues
authors.affiliation: c Laboratoire de Physiologie Moléculaire des Plantes , Centre de Biotechnologie de Borj-Cédria (CBBC) , Hammam-lif , Tunisie.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Hanana
authors.affiliation: d Laboratoire de Chimie Organique Appliquée, Faculté des Sciences Semlalia, Département de Chimie, Equipe Analyse et Contrôle de Qualité , Université Cadi Ayyad , Marrakech , Maroc.
authors.forename: Abderrahmane
authors.initials: A
authors.lastname: Romane
mesh_terms: D064089:Allelopathy; D005052:Eucalyptus / Q000737:chemistry*; D018525:Germination / Q000187:drug effects*; D006540:Herbicides / Q000737:chemistry* / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D057685:Plant Weeds / Q000187:drug effects*; D036226:Seedlings / Q000187:drug effects* / Q000254:growth & development*; D014908:Triticum / Q000187:drug effects* / Q000254:growth & development*
chemical_list: D006540:Herbicides; D010936:Plant Extracts
keywords: Allelopathy; Eucalyptus; extract; grasses, durum wheat, growth, radical elongation