Tissue necrosis in tobacco plant and DAB staining analyses.

(A) Photographs of tissue necrosis in tobacco leaves after inoculation for 24 h; a1, tobacco leaf injected with xylanolytic enzyme preparation of L. chartarum SJTU59; a2, tobacco leaf injected with supernatant of blank broth (control); a3, tobacco leaf injected with distilled water (control). (B) Photographs of DAB staining in tobacco leaves after inoculation for 24 h; b1, tobacco leaf injected with xylanolytic enzyme preparation of L. chartarum SJTU59; b2, tobacco leaf injected with supernatant of blank broth (control); b3, tobacco leaf injected with distilled water (control).