Night‐time conductance in C3 and C4 species: do plants lose water at night?

Significant night‐time stomatal conductance and transpiration were found for 11 out of 17 species with a range of life histories (herbaceous annual, perennial grass, shrub, tree), photosynthetic pathways (C3, C4), and habitats in the western United States. Across species and habitats, higher night‐time conductance and transpiration were associated with higher daytime values. The prevalence, mechanisms and ecological implications of substantial night‐time water loss deserve further investigation.