Effect of Aqueous Extracts from Weed Species on Germination and Initial Growth in Raphanus sativus L.

  • Anisoara STRATU Alexandru Ioan Cuza University, Faculty of Biology, Carol I Bd., 20 A, Iași, Romania (RO)
  • Zenovia OLTEANU Alexandru Ioan Cuza University, Faculty of Biology, Carol I Bd., 20 A, Iași, Romania
  • Andrei LOBIUC Alexandru Ioan Cuza University, Faculty of Biology, Carol I Bd., 20 A, Iași, Romania
Keywords: allelopathic potential; growth reduction; plant extracts; radish

Abstract

The current paper presents the results of a study on the effects of aqueous extracts from five weed species (Amaranthus retroflexus, Cirsium arvense, Convolvulus arvensis, Echinochloa crus-galii, Setaria verticillata) on germination and initial growth in Raphanus sativus L. The following indicators have been analyzed: indices of germination (the germination percentage; the speed of germination; the speed of accumulated germination and the coefficient of germination rate), the length of the root and hypocotyls, the pH of aqueous extracts, the UV-Vis absorption spectra of aqueous extracts. The results of the investigations showed the following aspects: the aqueous extracts reduced the values of calculated germination indices and root growth in the first ontogenetic stages of the test species; the pH of the extracts was slightly acid to neutral. Qualitative spectrophotometric analysis indicated the possible presence of phenolic and organic compounds in the extracts. C. arvense, S. verticillata and E. crus-galii presented the most pronounced effect on germination and growth processes.

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Published
2015-12-13
How to Cite
STRATU, A., OLTEANU, Z., & LOBIUC, A. (2015). Effect of Aqueous Extracts from Weed Species on Germination and Initial Growth in Raphanus sativus L. Notulae Scientia Biologicae, 7(4), 464-470. https://doi.org/10.15835/nsb749705
Section
Research articles
CITATION
DOI: 10.15835/nsb749705