EFFECTS OF PLANT HORMONES PRESENT IN BACTERIAL CULTURES ON THE FORMATION AND RESPONSES TO VA ENDOMYCORRHIZA

Abstract
SUMMARY: The growth and infection levels in mycorrhizalLavandula, LycopersicumandMedicagoplants were compared after treatment with preparations fromRhizobium, Azotobacterand phosphobacteria (aPseudomonas).The bacterial cultures are known to contain growth substances. Ceil‐free supernatants and in some instances, the whole bacterial culture, behaved as the pure plant hormone in improving dry weight and infection levels compared with mycorrhizal control plants.