) Bacterial endophytic colonization in roots of Lavandula dentata inoculated with autochthonous (B.t) dually inoculates with mixture autochthonous arbuscular mycorrhizal fungi (MIX). Different letters indicate significant differences (p ≤ 0.005) determined by Duncan’s multiple-range test (n = 5). (2) Transmission electron micro- graphs (TEM) showing intraradical hyphae (ih) penetrating cortical root cell of Lavandula dentata colonized by endophytic bacteria (Bacillus thuringiensis). (A) Presence of B. thuringiensis in intracellular cell (black arrow). (B) Bacteria endophytic colonization in intra and extracellular zones of cortex cells harbouring a functional arbuscule with well-separated hyphal structures and details of arbuscular branches (white arrow). The organelle-rich plant cytoplasm surrounding each arbuscule branch, which is enclosed by the periarbuscular membrane (white arrow). Chloroplats (ch); cell cytoplasm (cc); intercellular space (is). Bars = 5 m (A1); 2 m (A2; A3; B1; B2); 1 m (B3).