Study on the alelopatic action of the watery extract of Artemisia absinthium L. upon the germination of the caryopses and of the growth of the plantlets of Triticum aestivum L., Lolium perenne L. and of Bromus inermis L.

摘要

The paper has had as an objective evaluating the phyto-toxic effect, respectively alelopathic of the watery extracts prepared from various organs of the white wormwood plants (Artemisia absinthium L.), upon the germination of the wheat caryopses (Triticum aestivum L.), ryegrass (Lolium perenne L.) and of brome grass (Bromus inermis L.), and of the growth of the plantlets resulted from their embryos, in the conditions of their germination on filter paper humidified with such solutions, used in various concentrations (5, 15, 25, 50, 75 şi 100). After 7 days from germination, there was determined the length of the small roots and that of the small stems of the plantlets. The results obtained denote a strong negative influence exercised by these extracts, both upon the germination of the caryopses and of the growth of the plantlets of the species subject to testing, especially of the solution that was prepared from inflorescence of white wormwood. The alelopathic effect, respectively inhibiting upon the wheat plantlets, of ryegrass and of brome grass are intensified along with the increase of the concentration of the watery extract used as germination and growth substratum. The strongest negative reaction, at the three types of extracts, was manifested by brome grass, and the most resistant species was that of wheat. © 2009 Vasile Goldis University Press.