“…Betaproteobacteria found in early diverging fungi had been reported in Gigasporaceae (Bianciotto et al, 1996;Desir o et al, 2014;Toomer et al, 2015), in Rhizopus microsporus (Mucoromycotina) (Partida-Martinez and Hertweck, 2005), as well as in Mortierella elongata (Sato et al, 2010) and Mortierella alpina (Kai et al, 2012). Four endobacterial species have been defined: Candidatus Glomeribacter gigasporarum (CaGg) associated with Gigaspora margarita (Bianciotto et al, 2003), Burkholderia rhizoxinica (Br) and Burkholderia endofungorum (Be) associated with R. microsporus (Partida-Martinez et al, 2007a), and Mycoavidus cysteinexigens (Mc) associated with M. elongata (Ohshima et al, 2016) In contrast to MRE, Betaproteobacteria in early diverging fungi are somewhat less frequent and abundant within fungal cells. CaGg has been found in 11 out of 13 (84%) isolates of Gigaspora margarita (Desir o et al, 2014) and in 31 out of 59 (52%) members of the Gigasporaceae (Toomer et al, 2015).…”