Desertification and currents trends in climate changes are pushing us to focus on plant physiological limits under environmental stresses. Research in recent decades have highlighted that plant hydraulics are the key for plants ability to cope with extremities. Stomatal regulation, xylem architecture, hydraulic conductivity, aquaporins expression, osmotic content and many other hydraulic traits are critical for the maintenance and propagation of plants in arid environments. These traits are also known for their environmental plasticity and are a critical part of plants mechanisms to spread into varied habitats and sustain seasonal environmental changes. This session will take a wide scope on current research in plant hydraulic response to environmental stress.