title: Effect of aqueous extract of Azadirachta indica (Neem) leaves on germination and seedling growth of Vigna radiata (L.).
abstract: This research was carried out to evaluate the allelopathic effect of leaves aqueous extract of Azadirachta indica on germination and seedling growth of Vigna radiata. Different methods were used to preparing leaves aqueous extract. Germination percentage and seedling growth of V. radiata significantly decreased gradually as the concentration of the aqueous leaves extracts of A. indica increased in comparison with water control. Severe toxicity was observed at high concentrations and moderate toxicity at low concentrations in comparison with water control. Aqueous leaves extract significantly inhibited root length more than shoot. These results indicated that some kind of inhibitor(s) was the responsible agent for the phytotoxic effect of A. indica on germination and seedling growth of V. radiata.
authors.affiliation: Department of Applied Sciences, Higher College of Technology, P.O. Box 74, Postal Code 133, Al-Khuwair, Oman.
authors.forename: Fawzia Al
authors.initials: FA
authors.lastname: Charchafchi
authors.forename: Iman
authors.initials: I
authors.lastname: Al-Nabhani
authors.forename: Hanan
authors.initials: H
authors.lastname: Al-Kharousi
authors.forename: Fatma
authors.initials: F
authors.lastname: Al-Quraini
authors.forename: Amal
authors.initials: A
authors.lastname: Al-Hanai
mesh_terms: D000383:Agriculture / Q000379:methods; D031601:Azadirachta / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D007887:Fabaceae / Q000378:metabolism*; D018525:Germination; D010936:Plant Extracts / Q000378:metabolism / Q000494:pharmacology*; D018515:Plant Leaves / Q000378:metabolism; D018521:Plant Physiological Phenomena; D018520:Plant Shoots / Q000378:metabolism; D012639:Seeds / Q000502:physiology*; D013696:Temperature; D014867:Water / Q000737:chemistry / Q000378:metabolism*
chemical_list: D010936:Plant Extracts; D014867:Water