Allelopathy offers potential for weed control through the production and release of allelochemicals from leaves, flowers, seeds, stems and roots.  In this research, allelopathy potentials of ethanolic and aqueous extracts of Vinca rosea L. leaves were evaluated. Three extract concentrations, including 2.5, 5 and 10% (w/v) of both aqueous and ethanolic were prepared from a 10% w/v stock solution...

The present study was carried out to investigate the yield, quality, and metabolomic responses of four different vegetable crops treatments with pure juglone standard walnut (Juglans regia L.) leaf extract at soil concentrations found in orchards. A total 60 phenolic compounds were identified quantified, some for first time these crop vegetables. Beta vulgaris L. Lactuca sativa less susceptible...

Natural selection is a phenomenon, which allows nature to select at any point in time the structure and number of organism living in a particular habitat [1]. This competitive tendency has been shown and reported by several authors Bonner [2], Grummer et al. [3], Evenari (1961), Whittaker [4], Putman and Duke [5], and Fischer et al. [6]. Allelopathic behaviour can best be described as direct or...

Plants produce several chemically diverse bioactive substances that may influence the growth and development of other organisms when released into environment in a phenomenon called allelopathy. Several these allelopathic species also have reported medicinal properties. In this study, potential effects more than hundred plants from Cambodia were tested using dish pack method. The bioassay metho...

Many seaweeds and terrestrial plants induce chemical defences in response to herbivory, but whether they induce chemical defences against competitors (allelopathy) remains poorly understood. We evaluated whether two tropical seaweeds induce allelopathy in response to competition with a reef-building coral. We also assessed the effects of competition on seaweed growth and seaweed chemical defenc...

Cinnamic acid and its hydroxylated derivatives (p-coumaric, caffeic, ferulic and sinapic acids) are known allelochemicals that affect the seed germination and root growth of many plant species. Recent studies have indicated that the reduction of root growth by these allelochemicals is associated with premature cell wall lignification. We hypothesized that an influx of these compounds into the p...

Seven allelochemicals, namely R-(+)-limonene (A), vanillin (B), xanthoxyline (C), vanillic acid (D), linoleic acid (E), methyl linoleate (F), and (±)-odorine (G), were investigated for their herbicidal activities on Chinese amaranth (Amaranthus tricolor L.). At 400 μM, xanthoxyline (C) showed the greatest inhibitory activity on seed germination and seedling growth of the tested plant. Both vani...