The water relations of the maritime lichen Roccella hypomecha (Ach.) Borg. studied using thermocouple psychrometry

The water relations of the maritime lichen Roccella hypomecha were investigated using thermocouple psychrometry. Results showed that, while containing high concentrations of Na+, the osmotic potential and other aspects of the water relations of R. hypomecha resembled those of lichens growing in xeric non-saline habitats. The significance of these results for the water relations of maritime lichens is discussed