Abiotic stress through time

Throughout plant evolution the circadian clock has expanded into a complex signaling network, coordinating physiological and metabolic processes with environment. Early land plants faced new environmental pressures that required energy-demanding stress responses. Integrating abiotic response system provides control over daily energy expenditure. Here, we describe of in limited, yet compelling, evidence for conserved regulation stress. The need to introduce tolerance current crops research wild accessions revealed extensive variation parameters across monocot eudicot species. We argue ancestral links between will benefit crop improvement efforts.