تأثير البكتريا المحفزة للنمو (PGPR)‎ في الحد من الإصابة بفيروس موزاييك الخيار و تحفيز المقاومة لدى نباتات البندورة

Abstract EN

This experiment aimed to study the effect of three species of plant growth promoting rhizobacteria (Frateuria aurantia, Bacillus megaterium and Azotobacter chroococcum) inoculated on seeds or shoots of tomato plants, on disease severity, salicylic acid and peroxidase activity content and their ability to suppressed the effect of Cucumber mosaic virus (CMV) in a plastic tunnel in Tartus, Syria,in year 2016.

Results showed, that treatment with single bacterium F aurantia produced significant reduction in disease severity and higher salicylic acid and peroxidase activity content compared with B.

megaterium or A.

chroococcum, in the CMV-infected or healthy control.

Mixed treatment with the three bacterial species gave the higher reduction in disease severity and increase in salicylic acid content and peroxidase activity in both CMV-infected and healthy tomato plants.

On the other hand, the inoculated shoots method was significantly superior as compared with inoculated seeds method.

Such increase in salicylic acid content and peroxidase activity suggest the potential ability of rhizobacteria to Simulate mechanisms of systemic resistance and reduce the effect of CMV infection on tomato plants.