AUTHOR=Qin Sheng , Li Wen-Jun , Klenk Hans-Peter , Hozzein Wael N. , Ahmed Iftikhar TITLE=Editorial: Actinobacteria in Special and Extreme Habitats: Diversity, Function Roles and Environmental Adaptations, Second Edition JOURNAL=Frontiers in Microbiology VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2019.00944 DOI=10.3389/fmicb.2019.00944 ISSN=1664-302X