Potential impacts of seed bacterization or salix extract in faba bean for enhancing protection against bean yellow mosaic disease

In a greenhouse experiment, two strains of plant growth promoting rizobacteria (PGPR) mixture of (ICARDA-441 and ARC-202) as seed inoculants, and white willow (Salix alba) extract as foliar and seed treatment were tested for induction systemic acquired resistance (SAR) in faba bean plants against Bean yellow mosaic virus (BYMV). The results demonstrated that BYMV challenged plants emerged from Rhizobium inoculants seeds and salix extract showed reduction in the level of disease severity of BYMV infection. Significant improvements in faba bean were obtained due to the used Rhizobium leguminosarum (PGPR) as well as salix extract. On contrary, considerable reductions in all tested parameters were occurred as a result of the viral disease. Both PGPR inoculants and soaking treatment with salix extract showed significant increase in abscisic acid (ABA), salicylic acid (SA) and jasmonic acid (JA) levels when being compared with other treatments. The beneficial effects of the used treatments were extended to increase not only total phenol and free proline but also the activities of peroxidase and polyphenoloxidase enzymes in comparison with control plants. PGPR inoculants and salix extract (especially soaking) improved plant health by increasing the pigment contents similar to control values. [Sofy AR, Attia MS, Sharaf AMA and El-Dougdoug KA. Potential impacts of seed bacterization or salix extract in faba bean for enhancing protection against bean yellow mosaic disease. Nat Sci 2014;12(10):67-82]. (ISSN: 1545-0740). http://www.sciencepub.net/nature. 8