General Review of Active Defence Mechanisms in Plants Against Pathogens. - A Structural View of Active Defence. - Physiological and Biochemical Events Associated with Expression of Resistance to Disease. - Mechanisms Conferring Specific Recognition in Gene-for-Gene Plant-Parasite Systems. - Determinants of Plant Response to Bacterial Infection. - Defence Mechanisms of Plants Against Varietal Non-Specific Pathogens. - Mechanisms in Non-Host Resistance. - The Absence of Active Defence Mechanisms in Compatible Host-Pathogen Interactions. - Plant Immunization-Mechanisms and Practical Implications. - Genetical Aspects of Active Defence. - Active Resistance of Plants to Viruses. - Localized Resistance and Barrier Substances. - The Protective Effects of Systemic Virus Infection. - Regulation of Changes in Proteins and Enzymes Associated with Active Defence Against Virus Infection. - Antiviral Agents and Inducers of Virus Resistance : Analogies with Interferon. - The Effect of Defence Reactions on the Energy Balance and Yield of Resistant Plants. - Contributed Papers. - List of Participants. Language: English