Article (Scientific journals)
Allelopathic and autotoxicity effects of barley (Hordeum vulgare L. ssp. vulgare) root exudates
Bouhaouel, Imen; Gfeller, Aurélie; Fauconnier, Marie-Laure et al.
2014In BioControl, Online First
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Keywords :
Allelopathy; Hordeum vulgare L. ssp. vulgare; Root exudates; Competition; Allelochemical toxicity; Weed management
Abstract :
[en] The allelopathic activity of barley (Hordeum vulgare L. ssp. vulgare) root exudates was studied by comparing their effects on seedling establishment in barley itself and in two weed species, Bromus diandrus Roth. and Lolium rigidum Gaudin, using an original laboratory protocol, named ‘seed-after-seed’. In this protocol, the donor and the receiver species of watersoluble allelochemicals are grown one after the other in the same dishes, in conditions reducing resource competition between both species. Growth of all receptive species (weeds and barley) was inhibited in a dose-dependent manner, when using increasing barley seed densities (0, 8, 19 and 25 seeds per Petri dish). In our conditions, the barley varieties and landraces exhibited different allelopathic activities against weeds or barley. The allelopathic potential of the barley root exudates was also dependent on the receiver species. Indeed, the released allelochemicals proved to be more toxic against the weed plants than on barley itself. Furthermore, the toxicity of the allelochemicals increased after their release by roots, between day 0 and day 6. These allelochemicals might contribute to the plant community dynamics and their usefulness as bio-herbicides deserves further consideration.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Bouhaouel, Imen;  National Agronomic Institute of Tunisia > Department of Agronomy and Plant Biotechnology > Genetics and Plant Breeding Laboratory
Gfeller, Aurélie;  Swiss Federal Research Station Agroscope Changins
Fauconnier, Marie-Laure  ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie générale et organique
Rezgui, Salah
Amara, Hajer Slim
du Jardin, Patrick  ;  Université de Liège - ULiège > Sciences agronomiques > Biologie végétale
Language :
English
Title :
Allelopathic and autotoxicity effects of barley (Hordeum vulgare L. ssp. vulgare) root exudates
Publication date :
14 November 2014
Journal title :
BioControl
ISSN :
1386-6141
eISSN :
1573-8248
Publisher :
Kluwer Academic Publishers, Dordrecht, Germany
Volume :
Online First
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 January 2015

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