Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Allelopathy"”.
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Allelopathy of marine macroalgae against microbial epibiosis
Marine macroalgae are often devoid of micro- and macro-colonizers, suggesting some sort of host-derived antifouling defense. Previous studies mainly focused on tissue extracts of entire algae against few bacterial isolates, thereby not only neglecting ecologically relevant bacteria but also natural …
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CHARACTERIZATION OF SOD-INDUCED ALFALFA SEEDLING INJURY (ALLELOPATHY, ANAEROBIOSIS)
<p>Field and greenhouse studies were conducted to examine the seedling vigor of sod-sown alfalfa (Medicago sativa L.).</p><p>Seedlings grown in tilled soil had more dry matter, were taller, and had longer internodes than seedlings in sod. Node number and plant density were reduced in some …
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Allelopathy and autotoxicity studies and allelochemicals isolation and identification of alfalfa (Medicago sativa L.)
… short-term and long-term autotoxicity, and allelopathy using alfalfa, grasses, vetch, and weeds. The allelopathic effects of exudates from alfalfa plant parts and the soil in which alfalfa had been grown on alfalfa germination and seedling growth was studied. Based on radicle length growth, …
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An Investigation into the role of Allelopathy in influencing plant diversity around Lantana Camara groves
Invasive alien species have become a serious threat to plant biodiversity in many parts of the world. Globally the threat to biodiversity due to invasive alien species is considered second only to that of habitat loss. Invasive species are thus a serious impediment to conservation and sustainable …
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Ecological implications of allelopathic interferences with reference to Phragmites australis
… hybridisation, altered ecosystems processes, and allelopathy that may explain the invasion processes of plant species. Among these possible influences on invasion, allelopathy has received increased attention and study with the rise in understanding of its implications and potential …
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Optimización de bioensayos alelopaticos: aplicación en la búsqueda de herbicidas naturales
… Sanchez explains in detail the definition of allelopathy. He then focuses on applied potential of this recent field of ecology, and demonstrates how it can provide tools for sustainable agriculture.The second chapter is, as far as I know, the first up-to-date review dedicated to methods in …
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Concentration dependency, mode of action and characterization of compounds involved in alfalfa autotoxicity
Greenhouse experiments on allelopathy and autotoxicity of 'WL-316' alfalfa (Medicago sativa L.) indicated that plant height and fresh weight of alfalfa, and fresh weight of 'DK-38' sorghum (Sorghum bicolor (L.) Moench) were lower on soil previously cropped to alfalfa, 'alfalfa-soil', than on that …
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Waves of communication: Metabolomics describe the nature and role of waterborne cues in the marine environment
… and the metabolic consequences of allelopathy on competitors were elucidated. Metabolomics provides an opportunity to study waterborne cues where other approaches have historically failed, allowing for the advancement of our understanding of the chemical nature of a wide range of …
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Avaliação do potencial alelopático de resíduos foliares do Algodão de Seda sobre Picao-preto e Desmódio.
Allelopathy is addressed to the capability of plant species to interfer on the metabolism of another plant, by the releasing of chemical compounds in the environment. The aiming of this work was determinate the allelopathic influence of leaf residues of Calotropis procera in the germination and …
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Efeito do extrato aquoso das folhas de Nim indiano (Azadirachta indica) sobre o crescimento inicial de plantas daninhas.
… for water, light, nutrients and space. Allelopathy is a biological phenomenon that occurs when a plant species releases to the environment substances that may inhibit germination and / or establishment of other plant species and has potential application in agricultural ecosystems. The …
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Efeito do extrato aquoso das folhas de nim indiano (Azadirachta indica) sobre o crescimento inicial de plantas daninhas.
… for water, light, nutrients and space. Allelopathy is a biological phenomenon that occurs when a plant species releases to the environment substances that may inhibit germination and / or establishment of other plant species and has potential application in agricultural ecosystems. The …
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Action of Allelochemicals on Algal Growth and Photosystem Ii Efficiency
… in this research is useful in investigations of allelopathy.
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Eficiência alelopática de algumas espécies vegetais sobre o amendoim e plantas daninhas
Allelopathy is an interference phenomenon where a chemical plant can inhibit the development with also can stimulate the growth of others and has been considered its application in weed control in commercial crops. This study aimed to evaluate the allelopathic potential of some species on …
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Analysis of intraspecific and interspecific interactions between the invasive exotic tree-of-heaven (Ailanthus altissima (Miller) Swingle) and the native black locust (Robinia pseudoacacia L.)
… yet each has distinct functional roles such as allelopathy and nitrogen fixation, respectively. 1) A four-month full additive series in the greenhouse and 2) spatial point pattern analysis of trees in a silvicultural experiment were used to analyze the intraspecific and interspecific …
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THE BIOGEOGRAPHY OF Ageratina adenophora: A MEXICAN TRANS-GLOBAL INVADER
… University of Montana were conducted to test for allelopathy and volatile chemical reactions. This study was designed to determine the effects of Ageratina adenophora regarding seed germination, mortality, and plant biomass on plants from the invaded environments of China and India. These tests …
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THE BIOGEOGRAPHY OF Ageratina adenophora: A MEXICAN TRANS-GLOBAL INVADER
… University of Montana were conducted to test for allelopathy and volatile chemical reactions. This study was designed to determine the effects of Ageratina adenophora regarding seed germination, mortality, and plant biomass on plants from the invaded environments of China and India. These tests …
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Tracking Floral Visitation Using DNA Barcodes
… fitness of native plant species through pollen allelopathy, stigma clogging, stylar clogging, and ovule (seed) discounting. The prevalence of IPT and the importance of pollinators in mediating its impacts, however, remain poorly understood. Although most traditional methods for examining visitor …
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The competitive dynamics of toxic and non-toxic ribotypes of the harmful dinoflagellate Alexandrium tamarense in Scottish waters
… additional interaction(s) such as allelopathy were also involved. Laboratory studies assessing a number of Scottish sediment samples identified the presence of Group I, Group III and hybrid cysts, highlighting the possibility that the more dominant ribotype may outbreed the other …
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Catechin, a novel root exudate of Centaurea stoebe, exhibits pleiotropic effects on the soil microbial community and individual soil isolates, and undergoes chemical changes with numerous abiotic factors from soil
Allelopathy has been studied for (±)-catechin, a root exudate of spotted knapweed, as a plausible mechanism that facilitates knapweed invasion in North America. Phytotoxic effects are observed in invaded fields as well as greenhouse experiments when employing catechin or growing spotted knapweed, …
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