%0 Journal Article
%T Allelopathic effects of aqueous and organic fractions of Euphorbia dracunculoides Lam. on germination and seedling growth of chickpea and wheat Efectos alelop芍ticos de fracciones acuosas y org芍nicas de Euphorbia dracunculoides Lam. sobre la germinaci車n y crecimiento de pl芍ntulas de garbanzo y trigo
%A Asif Tanveer
%A Muhammad Kamran Jabbar
%A Abdul Kahliq
%A Amar Matloob
%J Chilean Journal of Agricultural Research
%D 2012
%I 
%X Identification of weed species with allelopathic potential and characterization of their adverse effects against associated crops is required for better understanding of weed-crop interactions. Phytotoxic activity of Euphorbia dracunculoides Lam. on germination and seedling growth of chickpea (Cicer arietinum L.) and wheat (Triticum aestivum L.) was investigated under controlled conditions. Two separate studies were done with each of four organic solvent fractions (n-hexane, chloroform, ethylacetate, 1-butanol) and crude aqueous (1:10 and 1:20) whole plant fractions of E. dracunculoides using distilled water and 0.05% (v/v) dimethyl sulfoxide (DMSO) as control. Different aqueous and organic fractions of E. dracunculoides had a significant bearing on germination attributes and seedling growth that varied among tested species. The final germination percentage of wheat remained unaffected; nevertheless, root and shoot elongation and biomass accumulation in these parts were significantly retarded. Aqueous fractions appeared more phytotoxic than organic fractions and suppressed chickpea germination by 35-53%. These aqueous fractions also reduced root (64-75% and 33-34%) and shoot (18-62% and 21%) length and root (32-33% and 42-46%) and shoot (7-32% and 80-84%) dry weight of wheat and chickpea, respectively. Among organic fractions, n-hexane was more suppressive to test species. Chromatographic analysis revealed the presence of four phytotoxins, furoic, p-coumaric, syringic, and caffeic acids, in aqueous whole plant (1:10) fractions. This study determined the phytotoxic allelopathic activity of E. dracunculoides against wheat and chickpea. Se requiere la identificaci車n de especies de malezas con potencial alelop芍tico y la caracterizaci車n de sus efectos adversos en contra de los cultivos asociados para una mejor comprensi車n de las interacciones cultivos-malezas. Se investig車 la actividad fitot車xica de Euphorbia dracunculoides Lam. en la germinaci車n y crecimiento de pl芍ntulas de garbanzo (Cicer arietinum L.) y trigo (Triticum aestivum L.) bajo condiciones controladas. Dos estudios separados se realizaron con cada una de las cuatro fracciones de disolventes org芍nicos (n-hexano, cloroformo, acetato de etilo, 1-butanol) y extracto acuoso (1:10 y 1:20) de fracciones enteras de plantas de E. dracunculoides usando agua destilada y 0,05% (v/v) dimetil sulf車xido (DMSO) como control. Diferentes fracciones acuosas y org芍nicas de E. dracunculoides tuvieron una incidencia significativa en los atributos de germinaci車n y crecimiento de las pl芍ntulas de las especies evaluadas.
%K alelopat赤a
%K malezas
%K atributos de germinaci車n
%K supresi車n
%K compuestos fen車licos
%K Allelopathy
%K weeds
%K germination attributes
%K suppression
%K phenolics
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400006