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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 72, No. 4, 2012, pp. 495-501
Bioline Code: cj12075
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 72, No. 4, 2012, pp. 495-501

 en ALLELOPATHIC EFFECTS OF AQUEOUS AND ORGANIC FRACTIONS OF Euphorbia dracunculoides check for this species in other resources LAM. ON GERMINATION AND SEEDLING GROWTH OF CHICKPEA AND WHEAT
Tanveer, Asif; Jabbar, Muhammad Kamran; Kahliq, Abdul; Matloob, Amar; Abbas, Rana Nadeem & Javaid, Muhammad Mansoor

Abstract

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 check for this species in other resources Lam. on germination and seedling growth of chickpea ( Cicer arietinum check for this species in other resources L.) and wheat ( Triticum aestivum check for this species in other resources 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.

Keywords
Allelopathy, weeds, germination attributes, suppression, phenolics

 
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