Induction of Systemic Resistance to Bean yellow mosaic virus (BYMV) Infecting Bean Plants Using Plant Extracts and Salicylic Acid

Abstract

Bean yellow mosaic virus (BYMV) was appeared to be in the last years the most frequently destructive virus of bean crop causing mosaic with bright yellowing symptoms. The virus was isolated in different locations in Egypt, and detected by using DAS-ELISA and Dot-blot immunobinding assay (DBIA). Initiative or introductory screening of inducers against BYMV infection on bean plants directed by using the local lesion assay (LLA) Chenopodium amaranticolor L. All used inducers were effective in decreasing the local lesion formation by the virus inoculation. Biochemical and ultrastructural modifications of bean plants (Phaseolus vulgaris, L. cv. karnk) leaves in response to Systemic Acquired Resistance (SAR) to BYMV infection. Treating of all inducers on infected bean leaves were effective in banning or obstruction of destroying and smashing effects that resulted after virus infection. ELISA was used as a diagnostic tool at the end to SAR. Extract of Dianthus caryophyllus L. was the most effective against BYMV as a factor of resistance induction.