The effects of supplementary mycorrhization regarding some vegetative characteristics at Iris germanica L.

Arbuscular mycorrhizal fungi can establish associations with over 80% of land plants. Most important beneficial effects for plants are: phosphorus availability, increased resistance to abiotic and biotic stress. Studies regarding the effects of mycorrhization on ornamental plants in our local pedoclimatic conditions are almost inexistent. The aim of this study was the evaluation of mycorrhizal inoculum effect over some vegetative characteristics for six Iris germanica cultivars. The experimental field was settled in Botanical Garden of UASVM Cluj-Napoca. For each cultivar were established two treatments: non-inoculated and inoculated with mycorrhizae. Results indicate that regarding the percentage of buds that entered vegetation in spring was higher for inoculated plants compared to non-inoculated plants. Inoculated cultivars ‘Sultan’s Palace’ and ‘Pinafore Pink’ had a higher number of shoots grown in spring than number of buds present in autumn. For most of the studied cultivars the mycorrhizae products exercised beneficial effects regarding the entering in vegetation of buds, or stimulating formation of new buds. This phenomenon is attributed both to mycorrhizal fungi and auxins added to inoculum