title: Variation in chemical composition and allelopathic potential of mixoploid Trigonella foenum-graecum L. with developmental stages.
abstract: This study was conducted to evaluate the influence of developmental stages (vegetative, flowering and fruiting) of mixoploid fenugreek aerial parts on their chemical composition and allelopathic potential, assessed on lettuce germination and seedling growth. Aqueous and organic extracts significantly delayed germination, reduced its rate and affected seedling growth. Ethyl acetate and methanol extracts of aerial parts harvested at vegetative stage were the most toxic for lettuce germination and seedling growth, respectively. LC-MS/MS analysis of T. foenum-graecum aerial parts methanolic extract showed nine different flavonol glycosides (quercetin and kaempferol glucosides). Chemical composition of aerial parts differed with the developmental stage; indeed, at the vegetative and fruiting stages, analysis revealed the presence of 9 compounds as compared to only 6 compounds at the flowering stage. Thus, it is necessary to follow the qualitative changes of allelochemicals production at different developmental stages to identify the most productive one.
authors.affiliation: Department of Biology, Faculty of Sciences of Bizerte, University of Carthage, Amilcar 1054, Tunisia (UR13AGR05). Electronic address: faten.omez@yahoo.fr.
authors.forename: Faten
authors.initials: F
authors.lastname: Omezzine
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bouaziz
authors.forename: Monique S J
authors.initials: MS
authors.lastname: Simmonds
authors.forename: Rabiaa
authors.initials: R
authors.lastname: Haouala
mesh_terms: D000383:Agriculture; D064089:Allelopathy; D018525:Germination / Q000187:drug effects; D031672:Orobanche / Q000187:drug effects / Q000254:growth & development*; D053147:Plant Exudates / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology; D057685:Plant Weeds / Q000187:drug effects / Q000254:growth & development*; D011003:Ploidies; D012639:Seeds / Q000187:drug effects / Q000254:growth & development; D053719:Tandem Mass Spectrometry; D029910:Trigonella / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D058728:Weed Control / Q000379:methods*
chemical_list: D053147:Plant Exudates
keywords: Developmental stage; Fenugreek; Flavonol glycosides; Mixoploidy; Phytotoxicity