Indeed, activity, although low, was detected in cotyledon veins and tips and also in leaf veins, trichomes, and hydathodes. |
Haberlandt pointed out that hydathodes and their analogues may also absorb water from the atmosphere. |
The exit of this xylem water, termed guttation, results in the formation of small droplets in the vicinity of the hydathodes. |
Another way of disposing of excess salt may be to lose salt from the hydathodes, which release water at times of low transpirational water loss, such as at night. |