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Related to allelochemicals: semiochemicals


 (ə-lē′lə-kĕm′ĭ-kəl, ə-lĕl′ə-)
A chemical emitted by an organism of one species that influences the physiology or behavior of an organism of a different species. Synthetic allelochemicals are sometimes used as herbicides or insecticides.

[Greek allēlōn, mutually (from allos, other; see al- in Indo-European roots) + chemical.]
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Finaly, much research work should be completed in the future to detect the members of allelochemicals responsible for this action and the appropriate methods of fractoination and identification to be exploit on the economic level.
A number of allelochemicals identified in dodder (Cuscuta spp) plant, including terpenes, phenols, phenolic acids, long-chain fatty acids, and lactose are similar to those in Parkia based products [26].
Most studies on Allelopathy have focused on the effects of extract from plant organs on seed germination and seedling growth, for it is difficult to identify the allelochemicals from the effects of competition among plants [4].
Due to their production of allelochemicals, plants can regulate the microbial community in their immediate vicinity, endure herbivores, encourage symbiotic improvement, change the physical and chemical properties of the surrounding environment and inhibit the growth of plant competition species that can interfere negatively with local culture, causing economic losses to agriculture (PEDROL et al.
1999) reported that the allelochemicals produced from decomposition of crop residue could inhibit soil [N.
He describes specific plant interactions, and explains that allelochemicals have a useful application in producing bio- herbicides for weed control.
There are two methods for creating a more allelopathic crop: One is to enhance existing allelopathy potential, and the other is to insert genes to produce allelochemicals not found in the crop.
As wheat-seedling density increased, the active concentration of allelochemicals exuded by wheat seedlings was presumed to increase accordingly, resulting in greater inhibition on the root growth of ryegrass.
These compounds are allelochemicals which are usually the secondary or waste products of main plants methabolic pathways specially shikimic acid and acetate pathways [21].
Another hypothesis was that allelochemicals unique to brassicas, principally isothiocyanates (ITCs), may actively suppress disease organisms in a process termed 'biofumigation' (Kirkegaard et al.