|
| Figure 1: An overview of exogenous and endogenous factors which involve in the plant cell homeostasis and ROS production during PCD in plants. Several biotic and abiotic environmental factors and aging renders cell to produce ROS. Endogenously produced ROS, may influence a highly regulated signal transduction systems which provides the either positive or negative feedback control mechanisms. To keep cell in homeostasis condition, antioxidants system is always actively involves preventing elevation of ROS level in cell. As Different gradient levels of ROS decide the fate of the cell in plants. Less ROS leads impaired physiological function that causes defects in the plant growth. Optimum level of ROS keep cell in homeostasis condition for normal growth and development of plants. In contrast, more ROS level leads random cellular damage and specific signaling pathways for necrosis, disease and aging, and autophagy and PCD. |
