title: Phytotoxical effect of Lepidium draba L. extracts on the germination and growth of monocot (Zea mays L.) and dicot (Amaranthus retroflexus L.) seeds.
abstract: Laboratory experiments were performed to determine phytotoxic potentials of white top (Lepidium draba) methanol extracts (root, stem and leaf) on germination and early growth of corn (Zea mays) and redroot pigweed (Amaranthus retroflexus). Furthermore, the effects of different methanol extracts of L. draba on the phytohormone (indole-3-acetic acid (IAA), gibberellic acid (GA), abscisic acid (ABA) and zeatin) levels of corn and redroot pigweed were investigated. It was observed that all concentrations of methanol extracts of root, stem and leaf of L. draba inhibited germination, radicle and plumule elongation when compared with the respective controls. Besides this, the degree of inhibition was increased in concert with increasing concentrations of extracts used. On the other hand, phytohormone levels changed with the application of different extract concentrations. Comparing with the control, the GA levels significantly decreased while the ABA levels increased in all the application groups. Zeatin and IAA levels showed changes depending upon the applied extracts and concentrations.
authors.affiliation: Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey.
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Kaya
authors.affiliation: Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey oz_aksakal@yahoo.com.
authors.forename: Ozkan
authors.initials: O
authors.lastname: Aksakal
authors.affiliation: Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey.
authors.forename: Serap
authors.initials: S
authors.lastname: Sunar
authors.affiliation: Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey.
authors.forename: Filiz Aygun
authors.initials: FA
authors.lastname: Erturk
authors.affiliation: Department of Biology, Faculty of Arts and Science, Mus Alparslan University, Mus, Turkey.
authors.forename: Sedat
authors.initials: S
authors.lastname: Bozari
authors.affiliation: Department of Biology, Faculty of Science, Atatürk University, Erzurum, Turkey.
authors.forename: Guleray
authors.initials: G
authors.lastname: Agar
authors.affiliation: Department of Biology, Faculty of Art and Science, University of Yuzuncu Yil, Van, Turkey.
authors.forename: Mehmet Emre
authors.initials: ME
authors.lastname: Erez
authors.affiliation: Department of Biology, Faculty of Art and Science, University of Yuzuncu Yil, Van, Turkey.
authors.forename: Peyami
authors.initials: P
authors.lastname: Battal
mesh_terms: D027721:Amaranthus / Q000187:drug effects / Q000254:growth & development*; D018525:Germination / Q000187:drug effects*; D029686:Lepidium / Q000737:chemistry / Q000633:toxicity*; D010936:Plant Extracts / Q000032:analysis / Q000633:toxicity*; D010937:Plant Growth Regulators / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D012639:Seeds / Q000187:drug effects* / Q000254:growth & development*; D003313:Zea mays / Q000187:drug effects / Q000254:growth & development*
chemical_list: D010936:Plant Extracts; D010937:Plant Growth Regulators
keywords: Lepidium draba; Phytotoxic potential; phytohormone; plumule; radicle