**Preface to "Drought Stress in Horticultural Plants"**

This Special Issue has been focused on "Drought stress in Horticultural plants". The authors throughout the duration of the Special Issue have contributed with original research and reviews covering a large number of topics associated with the effects of drought stress on different horticultural plants in open fields or in controlled environments. In addition, a good part of the articles is framed within the analysis of the response mechanism to drought stress. Water deficit, stress adaptation, drought responsive genes, gas exchange, enzyme activity are some of the keywords most used in the accepted manuscripts.

> **Stefania Toscano, Giulia Franzoni, and Sara Alvarez ´** *Editors*
