Rising air humidity during spring does not trigger leaf‐out in temperate woody plants.

Rising air humidity during spring does not trigger leaf-out in temperate woody plants Absolute air humidity was calculated as a function of temperature and relative air humidity, using the Clausius-Clapeyron equation implemented in the humidity R-package. In the control chamber, plants were watered if needed, but air humidity was otherwise not modified, resulting in an average relative air humidity of 70.0 ± 1.4% and an average absolute air humidity of 8.3 ± 0.3 g m SP -3 sp . Although physiological responses to elevated air humidity before leaf unfolding have never been tested, there is evidence that high humidity affects plant behaviour once the leaves are out. [Extracted from the article]