AUTHOR=Soto María J. , Staehelin Christian , Gourion Benjamin , Cárdenas Luis , Vinardell José M. TITLE=Editorial: Early signaling in the rhizobium-legume symbiosis JOURNAL=Frontiers in Plant Science VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.1056830 DOI=10.3389/fpls.2022.1056830 ISSN=1664-462X