AUTHOR=Wang Lei , Chong Kang TITLE=The Essential Role of Cytokinin Signaling in Root Apical Meristem Formation during Somatic Embryogenesis JOURNAL=Frontiers in Plant Science VOLUME=6 YEAR=2016 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2015.01196 DOI=10.3389/fpls.2015.01196 ISSN=1664-462X