The nucleation and/or spreading of bubbles in water under tension (due to water evaporation) can be problematic for most plants along the ascending sap network-from roots to leaves-called xylem. Due to global warming, trees facing drought conditions are particularly threatened by the formation of such embolisms, which hinders sap flow and can ultimately be fatal. Polydimethylsiloxane (PDMS)-based biomimetic leaves simulating evapotranspiration have demonstrated that, in a linear configuration, the existence of a slender constriction in the channel allows for the creation of intermittent embolism propagation (as an interaction between the elasticity of the biomimetic leaf and the capillary forces at the air/water interfaces) (Keiser