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Titolo:
Determination of allelochemicars in spring cereal cultivars of different competitiveness
Autore:
Baghestani, A; Lemieux, C; Leroux, GD; Baziramakenga, R; Simard, RR;
Indirizzi:
Agr & Agri Food Canada, St Foy, PQ G1V 2J3, Canada Agr & Agri Food CanadaSt Foy PQ Canada G1V 2J3 t Foy, PQ G1V 2J3, Canada Univ Laval, Dept Phytol, Quebec City, PQ G1K 7P4, Canada Univ Laval Quebec City PQ Canada G1K 7P4 Quebec City, PQ G1K 7P4, Canada
Titolo Testata:
WEED SCIENCE
fascicolo: 5, volume: 47, anno: 1999,
pagine: 498 - 504
SICI:
0043-1745(199909/10)47:5<498:DOAISC>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
CROPPING SYSTEMS; ACID CONTENT; WHEAT; ROOT; ALLELOPATHY; BARLEY; WEEDS; PHYTOTOXICITY; SUPPRESSION; SUBSTANCES;
Keywords:
Avena sativa L., oats; two- and six-rowed Hordeum vulgare L., barley; Triticum aestivum L., wheat; Brassica kaber (DC.) L. C. Wheeler SINAR, wild mustard; allelopathy; competition; phenolic compounds; root exudates; phytotoxicity; bioassay; cereals; competitive; noncompetitive; SINAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Lemieux, C Agr & Agri Food Canada, 2560 Hochelaga Blvd, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada 2560 Hochelaga Blvd St Foy PQ Canada G1V 2J3
Citazione:
A. Baghestani et al., "Determination of allelochemicars in spring cereal cultivars of different competitiveness", WEED SCI, 47(5), 1999, pp. 498-504

Abstract

Competitive cereal cultivars are less susceptible than others to weed interference. Their characterization may provide selection criteria that can beused as guidelines to develop new, even more competitive cultivars. Root exudates are a potential means by which competitive cultivars reduce weed growth. The objectives of this study were to evaluate the effect of cereal root exudates on Brassica kaber (DC. ) L. C. Wheeler growth, to isolate and characterize the allelochemical compounds released by spring cereal cultivars, and to determine ifa relation exists between these allelochemicals and cultivar competitiveness. Highly competitive (HC) and lesser competitive (LC)cultivars of four crop kinds (Triticum aestivum L. [wheat], Avena sativa L. [wild oat], two- and six-rowed Hordeum vulgare L. [barley]) were selectedbased on previous work. Exudates from undisturbed root systems of B. kaberand cereals were collected and used in a bioassay test with B. kaber. Rootexudates were analyzed for 16 common phenolic compounds using high-performance liquid chromatography (HPLC). Bioassays indicated that cereal exudateshad no negative effect on B. kaber germination, but all concentrations of cereal root exudates inhibited B. kaber root and hypocotyl growth. As cereal root exudate concentration increased, B. kaber growth decreased. For eachcrop kind, B. kaber growth inhibition was greater with HC cultivars than with LC cultivars. The root exudates of all crop kinds and cultivars contained benzoic, caffeic, ferulic, o-coumaric, and vanillic acids as well as scopoletin. Para-hydroxybenzoic acid was found in exudates from T. aestivum, A. sativa, and two-rowed H. vulgare cultivars. Para-coumaric acid was not identified in root exudates from LC H. vulgare cultivars. Gentisic acid was produced by A. sativa and H. vulgare. Vanillic and o-coumaric acids along with scopoletin may be responsible for the allelopathic effects of H: vulgare, T. aestivum, and A. sativa cultivars. These three compounds may be usefulas possible indicators of allelopathic potential of genotypes under development and thus considered for use in breeding programs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 10:36:10