AUTHOR=Berger Susanne , Van Wees Saskia C. M. , Nybroe Ole , Großkinsky Dominik K. TITLE=Editorial: Cross-Frontier Communication: Phytohormone Functions at the Plant-Microbe Interface and Beyond JOURNAL=Frontiers in Plant Science VOLUME=11 YEAR=2020 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2020.00386 DOI=10.3389/fpls.2020.00386 ISSN=1664-462X