Release of allelochemical agents from litter, throughfall, and topsoil in plantations ofEucalyptus globulus Labill in Spain

Abstract

Natural leachates ofEucalyptus globulus (throughfall, stemflow, and soil percolates) were collected daily during rainy spells in the vegetative period (February-July), and their effects on the germination and radicle growth ofLactuca sativa were measured. Concurrently, the effects ofL. sativa of topsoil and leachates from decaying litter were determined. The results suggest that toxic allelochemicals released byEucalyptus globulus may influence the composition and structure of the understory of the plantation and that this effect is attributable mainly to the decomposition products of decaying litter rather than to aerial leachates. The soil may neutralize or dilute allelopathic agents, at least below the top few cms.

Allelopathic potential of Medicago arborea, a Mediterranean invasive shrub

“…A base solution of 20 g l −1 was prepared from 4 g of foliar tissue and 200 ml of deionised water (Molina et al, 1991;BongSeop, 1992;Vyvyan, 2002). The extract was left for 27 hours in a refrigerator (4 °C ± 2 °C), shaken occasionally, and was then filtered through Whatman No.…”

Potential allelopathic effect of Pinus halepensis in the secondary succession: an experimental approach

“…batavia (Asteraceae, Asterales), species known for its sensitivity to allelopathic substances and frequently used for bioassays (Molina et al, 1991;Chiapusio et al, 1997;Chou et al,1998), and (2) Linum strictum L. (Linaceae, Linales), present in open environments in Provence calcareous areas (Loisel, 1976), particularly in the first secondary succession stages following abandoned agricultural lands (Tatoni, 1992).…”

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

“…Most of allelopathic studies are usually done in laboratory bioassay experiments focussing on the effects of leaf chemicals, volatile compounds, foliage decomposition and root exudates on such factors as seed germination and early seedling growth (Fang et al, 2009;Lisanework and Michelsen, 1993;Molina et al, 1991). However, these techniques hardly represent natural ecological processes (May and Ash, 1990).…”