Journal of Food, Agriculture and Environment

Allelopathic activity of Leonurus sibiricus on different target plant species

Author(s):

A. K. M. Mominul Islam *, Hisashi Kato-Noguchi

Recieved Date: 2014-01-29, Accepted Date: 2014-03-30

Abstract:

Allelopathy of Leonurus sibiricus L. (Lamiaceae) was examined against the germination of Italian ryegrass (Lolium multiflorum Lam.), barnyard grass (Echinochloa crus-galli L.), garden cress (Lepidum sativum L.) and lettuce (Lactuca sativa L.), and the seedling growth of Italian ryegrass, barnyard grass, timothy (Phleum pratense L.), hairy crabgrass (Digitaria sanguinalis L. scop.), garden cress, lettuce, alfalfa (Medicago sativa L.) and rapeseed (Brassica napus L.). A significant inhibition and/or delay of germination was found in Italian ryegrass, garden cress and lettuce at concentration of 100 mg dry weight equivalent extract/ml. Except the shoot and root growth of barnyard grass, all other test plant species were significantly inhibited by the plant extracts at concentrations ≥30 mg dry weight equivalent extract/ml. Inhibitory activities of the L. sibiricus extracts depended on the concentrations of the extract and test plant species. Considering the concentration required for 50% inhibition (IC₅₀ values), the shoot growth of lettuce and the root growth of timothy were most sensitive to the extracts, whereas shoot of hairy crabgrass and root of Italian ryegrass were least sensitive. Results of this study suggest that L. sibiricus have allelopathic properties and may possess allelopathic substances.

Keywords:

Allelopathy, allelopathic substance, Lamiaceae, medicinal plant, Leonurus sibiricus, bioassay

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 2
Category: Agriculture
Pages: 286-289

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