Improvement of steress tolerance by redox-active proteins

Mohammad Reza Hajirezaei, Suresh Tula, Fahimeh Shahinnia, Nicole Schäfer

From an agronomic viewpoint, environmental stress conditions impose an increasing limitation on yield formation in crops. In cyanobacteria, flavodi-iron proteins are supposed to play an adaptive role in combating adverse enviromental situations that lead to an excess of electron pressure on the photosynthetic electron transport chain, such as high light, CO2 limitation or any other stress that uncouples NADPH production from its use in the Calvin cycle or in other metabolic routes. We use these cyanobacterial proteins to develop alternative biotechnological approaches in cereals to understand the importance of redox-sensitive processes in stress tolerance towards challenging environmental conditions.