AUTHOR=Gruszka Damian , Bajguz Andrzej , Li Qian-Feng , Hayat Shamsul , Hansson Mats , Wang Xuelu , Li Jianming TITLE=Editorial: An Update on Brassinosteroids: Homeostasis, Crosstalk, and Adaptation to Environmental Stress JOURNAL=Frontiers in Plant Science VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2021.673587 DOI=10.3389/fpls.2021.673587 ISSN=1664-462X