Many invasive species show allelopathic effects that contribute to competitive impacts on native vegetation for which few control measures exist. We investigated the potential pyrolized organic material used as a soil amendment (“biochar”) sorb allelochemicals and mitigate seed germination early seedling development in three common plants Canada: garlic mustard (Alliaria petiolata), tree of hea...

Plants can produce and release allelochemicals to interfere with the establishment growth of conspecific interspecific plants. Such allelopathy is an important mediator among plant species in natural managed ecosystems. This review focuses on grasslands forests. Allelopathy drives invasion, exacerbates grassland degradation contributes forest regeneration. Furthermore, autotoxicity (intraspecif...

Blooms of freshwater toxic cyanobacteria are a growing environmental health problem, enhanced by anthropogenic eutrophication and climate change. A variety techniques were tested for their remediation, from physical methods using artificial mixing or flocculation, to chemical employing synthetic natural compounds, as well constructed wetlands. In this work, we conducted an evaluation at microco...

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...

Laboratory experiments were conducted to evaluate the allelopathic effects of the water extract of Argemone mexicana L. on the seed germination, plumule length, radicle length, fresh and dry weight in Sorghum (Sorghum bicolor Moench). The allelopathic potentialities of leaf extracts of A.mexicana decreased the seed germination of Sorghum bicolor with raise of extracts concentration. The extract...

In this paper, we study some general models suggested to describe the effects of chemical compounds produced by an algal population on its survival in a chemostat-like environment. The conditions for its persistence and extinction are found. In particular, in the first model we make very general assumptions to represent the uptake, the regulative and the inhibiting functions, and analyze its gl...

Allelopathy arises from the release of chemicals by one plant species that affect other species in its vicinity, usually to their detriment. Allelopathic effects have been demonstrated to be limiting factors for species distributions and ecological processes in some natural or agricultural communities. Based on the biphasic hormetic responses of plants to allelochemicals, ecological-limiting-fa...

Plant breeders have generated many crop varieties that resist insects and pathogens through improved arsenals of bioactive natural compounds. More recently, molecular biologists have produced highly successful virusand insect-resistant crops by introduction of transgenes that ultimately protect crops by means of natural polypeptides. Herbicides have been the largest segment of the pesticide mar...

The importance of plant allelochemicals in plantherbivore interactions is well known. Although some of these phytochemicals act as phagostimulants for specific herbivores, the majority of allelochemicals examined appear to function primarily in plant defense, acting as insect antifeedants, growth regulators, and/or toxins (Jermy, 1966; Bernays & Chapman, 1977). As such, these chemicals have gre...