AUTHOR=Masson Patrick H. , Takahashi Taku , Angelini Riccardo TITLE=Editorial: Molecular Mechanisms Underlying Polyamine Functions in Plants JOURNAL=Frontiers in Plant Science VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2017.00014 DOI=10.3389/fpls.2017.00014 ISSN=1664-462X