Response to drought of Zn-stressed Quercus suber L. seedlings

▶ Small quantities of Zn had no significant effect on the morpho-physiological traits. ▶ Zn induced stomatal closure and decreased photosynthesis and photochemical efficiency. ▶ In the short term, Zn may promote water conservation. ▶ Zn may impair seedling ability to root and grow in a longer term.