| Popis: |
Plastids are best known for their role in photosynthesis and metabolism. However, accumulating evidence indicates that plastids could be important environmental sensors and executors of the adaptative responses of plants. The mechanisms involved are diverse, ranging from the recognition of pathogen invaders to the execution of signaling cascades that trigger their destruction. Thus, several pathogens and parasites exploit or hijack plastid functions to evade host defenses. Plastids are also implicated in the adaptation of plants to low nutrient environments. Finally, at the end of the life cycle or during the reproduction stage, the adequate implementation of the programs leading to senescence or to the increased pigmentation necessary for the attraction of pollinators and seed dispersal are also among the key roles assigned to plastids. |
