iTRAQ-based quantitative proteomic analysis reveals senescence mechanism of postharvest tobacco

Senescence (or aging) is the final stage of plant development; senescence involves a complex programmed process that is closely related to biotic and abiotic stresses and is regulated by fine-tuned molecular mechanisms. Postharvest vegetative organs undergo a series of physiological and biochemical changes during senescence. However, if postharvest plant organs were not scientifically processed or cured, there would be a great loss in their commercial value during curing or storage. Thus, studying the molecular mechanisms underlying senescence of plant organs will enhance understanding of such a fundamental biological process and might provide new insights into controlling senescence and improving commercial value during curing or storage. However, few studies have focused specifically on the molecular mechanism of leaf senescence affecting tobacco quality at the proteomic level during the yellowing stage.