A wide range of natural AM colonization levels (as a percentage
of root length colonized), was found in the four shrub species
(Fig. 3). In control plants grown without fermented agrowaste the
greatest AM colonization was observed for T. vulgaris and the
lowest in S. chamaecyparissus. All bacterial inoculation treatment
increased percentage of the mycorrhization in S. chamaecyparissus
and S. officinalis, while this effect was only observed in L. dentata
when inoculated with Enterobacter sp. The highest percentage of
natural AM root colonization in each plant growing in soil without
fermented agrowaste was reached in the bacteria-inoculated
plants, with the exception of B. thuringiensis and Bacillus sp. when
inoculated in T. vulgaris (Fig. 3).