Pathogenesis-Related Proteins and Disease Resistance

摘要: Plants grown in the field are subjected to an array of abiotic and biotic stresses, such as drought, flooding, extreme temperatures, heavy metals, UV irradiation, high salt concentrations, insect pathogenic attacks. provided their genetic makeup with ability adjust metabolically structurally circumvent these adversaries ensure survival. For example, when soybean seedlings immediate shift from 30 40 °C, there is a dramatic rapid change pattern protein synthesis. Many proteins synthesized at normal temperatures rapidly decline, new set heat-shock induced (Key et al., 1981). Synthesis gradually disappears maintained or plant returned temperature. Similarly, exposed increasing concentrations NaCl, cultured tobacco cells synthesize accumulate 26-kD known osmotin exhibit increased tolerance osmotic stress (Singh 1987). Although precise functions not fully understood, some experiments strongly indicate that presence confers conditions.