Evidence for regulation of transpiration in nonstomatal plants: insights from bryophyte gametophytes

). Additionally, species with better water control also exhibit traits of an avoidance strategy, including elastic tissues, high capacitance, and less negative osmotic pressure. These findings point to a basal, non-stomatal mechanism of water loss control through cell membranes and/or cell walls. Potentially, this mechanism is homologous to the nonstomatal control recently identified in angiosperms, which induces unsaturated conditions in the substomatal cavities. Bryophyta presents a valuable nonstomatal model for further investigating this mechanism.