Foreword -- Preface -- Acknowledgement -- Contents -- SECTION 1: New Methodology and Approach (Dose Response, Bioassay) -- 1. Dose/Response Relationships in Allelopathy Research -- Introduction -- Classical Dose/Response Relationships with Pure Compounds and Mixtures -- Dose/Response and Mode of Action -- Hormesis -- Dosing with Plant Densities -- Conclusion -- References -- 2. Can Data Derived from Field and Laboratory Bioassays Establish the Existence of Allelopathic Interactions in Nature? -- Introduction -- Discussion -- Alternative Hypotheses -- Experimental Approaches -- Mathematical Models -- Some Misconceptions about Mathematical Models -- Can Empirical Models be used to Establish the Existence of Allelopathic Interactions in Nature? -- Conclusions -- Acknowledgments -- References -- 3. Plant-box Method: A Specific Bioassay to Evaluate Allelopathy through Root Exudates -- Introduction -- Materials and Methods -- Plant Preparation -- Root Zone-separating Tube Preparation -- Selection of Gel-supports -- Calculation of Allelopathic Activity -- Selection of Optimum Agar Concentration -- Test for Migration Speed of Compounds -- Agar Preparation -- Transplanting of Test Plants into Plant-box -- Seeding Process -- Plant Growth Conditions -- Protocol For Plant-Box Method -- Results and Discussions -- Tang and Zhang's Teflon Ring Separation Method -- Establishment of the Plant-box Method -- Selection of Gel-supports -- Assessment of Allelopathic Activity by the Plant-box Method -- Conclusion -- Acknowledgments -- References -- SECTION 2: New Allelochemicals (Pharmaceuticals, Degradation, Promotion, Ion Dissolution) -- 4. Isolation, Structural Elucidation and Synthesis of Biologically Active Allelochemicals for Potential Use as Pharameceutica -- Introduction -- Materials and Methods -- B16 Melanoma -- PC3 -- Etiolated Wheat Coleoptiles.

Results and Discussion -- Conclusion -- References -- 5.Recent Chemical Aspects of Wheat Allelopathy -- Introduction -- Quantification of Allelochemicals in Wheat -- Practical Application of Quantitative Techniques -- Sample preparation -- Chromatographic conditions -- Mass sepectrometry conditions -- Quantifying method -- Wheat Root Exudates -- Correlations Between Wheat Allelochemical Concentrations and Observed Phytotoxicity -- Metabolic Studies on Wheat Allelochemics -- References -- 6. Ecological Relevance of the Degradation Processes of Allelochemicals -- Introduction -- Materials and Methods -- Origin of DIMBO and their Derivatives -- Soil Collection -- Sampling and Processing of Soil -- Analysis of Hydroxamic Acids in Soil -- Results -- Degradation -- Bioassay Resluts -- Discussion -- Conclusion -- Acknowledgments -- References -- 7. Iron Dissolution Reaction of Mugineic Acids for Iron Acquisition of Graminaceous Plants -- Introduction -- Iron-Deficiency of Plants in the World -- Iron-Acqisition Mechanisms of Plants Under Iron-Deficient Conditions -- Chemical from of Iron in Soil -- Reactions of Mugineic Acid with Soil Minerals and Soils -- Kinetics of the Interaction between Mugineic Acid and Ferrihydrite -- Interactions of Mugineic Acid with Ferrihydrite as Affected by pH -- Interactions of Mugineic Acid with Various Fe Minerals -- Mechanisms of Interaction between Mugineic Acid and Fe Minerals -- Influences of Coexisting Ions on the Interactions between Mugineic Acid and Fe Minerals -- Interactions between Mugineic Acid and other Soil Components -- Interactions of Mugineic Acid with Crude Soil -- Conclusion -- References -- 8. Chemical and Biological Analysis of Novel Allelopathic Substances, Lepidimoide and Lepidiom -- Introduction -- Structure-Activity Relationship -- Arabidopsis Bioassay -- Effect on Senescence -- Effect on Abscission.

Effect on CHL Biosynthesis -- Effect on Glycolytic Metabolism -- Conclusions and Prospects -- Acknowledgments -- References -- SECTION 3:Allelopathy in Potential Invasive Weeds -- 9. Allelopathic Activity of White Rocket [Diplotaxis erucoides (L.) DC.] -- Introduction -- Materials and Methods -- Laboratory Experiments -- Experiment 1. Effect of full-strength aqueous extracts -- Experiment 2. Effect of extract concentrations -- Experiment 3. Effect of root exudates -- Experiment 4. Effect of foliage leachates -- Experiment 5. Effect of volatile materials -- Glasshouse Experiments -- Experiment 6. Effect of soil incorporated residues -- Experiment 7. Effect of surfface placed residues -- Experiment 8. Effect of root exudates -- Experiment 9. Effect of floiage leachates added to the soil -- Experiment 10. Effect of decayed residues -- Statistics and data analysis -- Results -- Laboratory Experiments -- Experiment 1. Effect of full-strength aqueous extracts -- Experiment 2. Effect of extract concentrations -- Experiment 3. Effect of root exudates -- Experiment 4. Effect of foliage leachates on wheat -- Experiment 5. Effect of volatile materials -- Glasshouse Experiments -- Experiment 6. Effect of soil incorporated residues -- Experiment 7. Effect of surface placed residues -- Experiment 8. Effect of root exudates -- Experiment 9. Effect of foliage leachates -- Experiment 10. Effect of decayed residues -- Discussion -- Conclusion -- References -- 10. Weed-crop Interferences in Hungary -- Introduction -- Materials and Methods -- Laboratory Experiments (Bioassays) -- Pot Experiments -- Results and Discussion -- Laboratory Experiments (Bioassays) -- Pot Experiments -- Acknowledgments -- References -- SECTION 4: Allelopathic Cover Crops to Suppress Weeds -- 11. Allelopathic Activity of Buckwheat: A Ground Cover Crop for Weed Control -- Introduction.

Allelopathic Substances Isolated from Aerial Parts of Buckwheat -- Field Experiments -- Laboratory Experiments -- Conclusion -- References -- 12. Sunflower-desired Allelopathic Crop for Sustainable and Organic Agriculture? -- Introduction -- Variation in Allelopathic Activity of Sunflower-Bioassays -- Genotypic Variation -- Organ-specificity -- Effects of Environmental Conditions -- Allelopathic Activity Against Most Common Weeds -- Allelopathic Effects of Sunflower on Crops -- Performance of ALlelopathic Activity of Sunflower in the Field -- Allelopathic Activity Against Most Common Weeds -- Allelopathic Activity Towards Crops -- Autotoxicity -- Prospects for Exploitation of Sunflower Allelopathy in Practice -- Future Study on Sunflower Allelopathy -- Acknowledgement -- References -- 13. The Potential for Allelopathy During Decomposition of Hairy Vetch Residue -- Introduction -- Materials and Methods -- Results -- Discussion -- Evidence for Allelochemicals in Hairy Vetch Leaves -- Synergism between Natural Toxins and Surface Residue in Natural Systems -- Model for Weed Suppression by Hairy Vetch Residue and the Role of Allelopathy -- References -- 14. Allelopathic Effect of Astragalus adsurgens Pall Root Culture -- Introduction -- Materials and Methods -- Root Culture -- Collection of Culture Filtrate -- Bioassay Procedure -- Experiment 1 -- Experiment 2 -- Experiment 3 -- Experiment 4 -- Results -- Effect of A. adsurgens Root Culture Filtrates on Radicle and Coleoptile Elongation of Alfalfa, A.adsurgens and Wheat (Triticum aestivum L.) -- Effect of Root Culture Filtrate on Grwoth of S. Chamaejasme Radicle -- Discussion -- Acknowledgements -- References -- 15. Evaluation of Weed Suppressive Effect of Allelochemicals of Ornamental Marigold Species -- Introduction -- Materials and Methods -- Results -- Conclusion -- References.

SECTION 5: Rice Allelopathy -- 16. Rice Allelopathy -- Introduction -- Materials and Methods -- Plant Materials -- Extraction of Water-soluble Components -- Bioassay with Lettuce -- DNA Analysis -- QTL Analysis -- Results -- Inhibitory Effect Detected in the Extracts from Rice Plants at Different Growth Stages -- QTL Analysis -- Conclusion -- References -- 17. Allelochemicals Involved in Rice Allelopathy -- Introduction -- Materials and Methods -- Instruments and Allelopathic Rice Seedings -- Isolation and Identification of Secondary Rice Metabolites -- Analysis of Allelochemicals in Soil -- Bioassays -- Results -- Conclusion -- Acknowledgments -- References -- SECTION 6: New Approach in Tree Allelopathy -- 18. Variation in Allelopathic Influence among Wide Range of Tree Species -- Introduction -- Difference in Vegetation Under Trees Among 120 Species -- Difference in Soil Properties Under Trees Among 175 Species -- Discussion -- Conclusion -- Acknowledgement -- References -- 19. Monitoring Allelopathic Expression and Functional Performance of Tamarind (Tamarindus indica L.): A Case Study -- Introduction -- Materials and Methods -- Allelopathic Potentiality of Leaf -- Plant materials -- Bioassay -- Crude water-soluble extraction of tamarind leaf -- Germination test -- Physiological experiment -- Allelopathic Potentiality of Root -- Plant materials -- Plant-box method experiment -- Soil preparation and greenhouse experiment -- Soil sampling -- Soil-agar sandwich method experiment -- Allelopathic Potentiality of seed and seed-coat -- Preparation of seed and seed-coat -- Germination test -- Pot culture experiment -- Results and Discussion -- Conclusion -- Acknowledgment -- References -- 20. Influence of Water Extract from Uncaria tomentosa Bark on Ultrastructure of Capsicum -- Introduction -- Material and Methods -- Results -- Conclusion -- References.

SECTION 7: New Field in Allelopathy (Aquatic Plants, Mushrooms, Insects, Animals).