AUTHOR=Moustakas Michael , Calatayud Ángeles , Guidi Lucia TITLE=Editorial: Chlorophyll Fluorescence Imaging Analysis in Biotic and Abiotic Stress JOURNAL=Frontiers in Plant Science VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2021.658500 DOI=10.3389/fpls.2021.658500 ISSN=1664-462X