Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Env Exp Biol (2014) 12: 83–87
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Environmental and
Experimental
Biology

Env Exp Biol (2014) 12: 83–87

Orginal Articles

Evaluation of allelopathic effects of methanolic extracts from Salicornia herbacea seed and leaves on germination and seedling growth in vitro of two medicinal plants and two weeds

Javad Sharifi Rad1, Majid Sharifi Rad2*, Jaime A. Teixeira da Silva3
1Zabol Medicinal Plants Research Center, Zabol University of Medical Sciences, Zabol 61615-585, Iran
2Department of Range and Watershed Management, Faculty of Natural Resources, University of Zabol, Zabol, Iran
3P.O. Box 7, Ikenobe 3011-2, Miki-cho, Kita-gun, Kagawa-ken, 761-0799, Japan
*Corresponding author, E-mail: majid.sharifirad@gmail.com

Abstract

In this study, methanolic extracts obtained from dried seeds and leaves of Salicornia herbacea, a medicinal plant, were evaluated at 2.5, 5 and 10% (v/v) in vitro for their potential allelopathic effects on the germination and seedling parameters of medicinal plants Hyssopus officinalis and Nigella sativa, and weeds Taraxacum officinale and Amaranthus retroflexus. Root length of T. officinale and A. retroflexus decreased significantly after exposure to 10% leaf extract, while all concentrations decreased the germination percentage of both weeds. Amaranthus retroflexus shoot length decreased significantly only after exposure to 10% leaf extract. In N. sativa, increasing concentration of leaf extracts increased shoot length and in H. officinalis maximum shoot length occurred at 5% concentration, but a further increase in concentration of leaf extracts had no negative impact on root length or seed germination. A very similar trend was observed for seed extracts. The negative effects on both weeds may be due to active compounds and/or allelochemicals in S. herbacea, whose seed and leaf extracts could be used as effective herbicides when applied at 5 or 10%, although the allelochemical(s) responsible for this allelopathic activity have yet to be identified.

Key words: allelopathic, germination, growth, methanolic extract, Salicornia herbacea.

 
Env Exp Biol (2014) 12: 83–87
 DOI: http://doi.org/10.22364/eeb
EEB

Editor-in-Chief
Prof. Gederts Ievinsh



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