4). Arbuscules, the signature of Glomeromycota colonization in angiosperms, are produced in some lycopod and fern—Glomeromycota associations (e.g. Ptisana, Angioptens, °mune& — Ogura-Tsujita et A, 2013) but are lacking in others (see Strullu-Derrien cal, 2014 and references therein), as is also often the case in