EVALUATION THE INTERACTION BETWEEN SOME MEDICINAL PLANTS AND THEIR ASSOCIATED ENDOPHYTIC MICROORGANISMS

Abstract

The present work was carried out for isolation, purification and selection of efficient endophytic bacterial isolates associated with some medicinal plants due to their PGP activities and production of bioactive secondary metabolites. As well as, verify their effects, to induce the systemic resistance in basil plants (Ocimum basilicum) in presence of Fusarium oxysporium (biotic stress). Addtionally, evaluate the effect of the most potent strains as a biofertilizer and bicontrol agent on growth and disease severity of Ocimum basilicum (basil) and Coriandrum sativum (coriander). The results could be summarized as follows: 1. Isolation of endophytic microorganisms Eighty nine endophytic bacterial isolates were isolated by two techniques from surface sterilized roots of seven medicinal plants. The percentage of bacterial isolates were 21.34%, 19.10%, 17.97%, 15.73%, 10.11%, 8.98% and 6.74% from Rosmarinus officinalis, Pelargonium graveolens, Ocimum basilicum, Saliva officinalis, Anethum graveolens, Coriandrum sativum and Origanum majorana respectively.