Thursday 15 June 2017
From oxidative signaling to RNA metabolism : novel insights in the regulation of seed germination
Reactive Oxygen Species (ROS) are key players in seed biology. They are produced from embryogenesis to germination, but also during seed after-ripening and storage, and their homeostasis regulates the potential of seeds to germinate. We recently proposed thee concept of the “oxidative window for germination” which alllows explaining the role of ROS in seed germination. Data obtained with seeds of crops and Arabidopsis show that ROS act as sensors of environmental cues and that they can translate environmental signals to endogenous signals regulating germination. The perception of environmental factors by ROS also regulates the expression of seed dormancy through an interplay between with hormone signaling pathways. Deciphering the molecular events associated with ROS homeostasis moreover allowed us to decipher novel mechanisms of regulation of seed germination and highlighted the role of RNA metabolism in this process.
Contact : Cathy Curie