PL PATH 300 Study Guide - Midterm Guide: Lipid Peroxidation, Reactive Oxygen Species, Superoxide
Document Summary
Disease: no avr allele; virulent r allele, avr allele no r allele, no avr allele no r. First, the activation of r genes triggers an ion flux, involving an efflux of hydroxide and potassium outside the cells, and an influx of calcium and hydrogen ions into the cell. Second, the cells involved in the hr generate an oxidative burst by producing reactive oxygen species, superoxide anions, hydrogen peroxide, hydroxyl radicals and nitrous oxide. These compounds affect cellular membrane function, in part by inducing lipid peroxidation and by causing lipid damage. Race specific resistance- resistance to some races of the pathogen, but not to others. Synonymous to vertical resistance. qualitative resistance- resistance that is expressed in large and discontinuous increments. Synonymous with horizontal resistance. general resistance- resistant to more than one disease. Associated with race non- specific. quantitative resistance- resistance that is expressed as a continuous variate between maximum and minimum levels. associated with polygenic inheritance.
