Prevention of bacterially induced hypersensitive reaction by living bacteria

• Published in: Physiological plant pathology Vol. 3; no. 1; pp. 133 - 136
• Main Authors: Novacky, A., Acedo, Gregoria, Goodman, R.N.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1973
• Subjects: tobacco
• ISSN: 0048-4059
• DOI: 10.1016/0048-4059(73)90029-5

Infiltration of tobacco leaf with the low concentration (5 × 10 5 cells/ml) resulted in decreased capacity of the tissue to develop hypersensitive reaction (HR) against higher concentration of the same bacterium. Development of HR against 5 × 10 6 cells/ml (the lowest HR-inducing concentration) was prevented as early as 3 h after inoculation with 5 × 10 5 cells/ml. HR induction with bacterial concentration up to 10 8 cells/ml could be prevented by preinoculation of the tissue with 5 × 10 5 cells/ml twice at 24-h intervals. Preventive effect was light dependent and is translocatable to the untreated surrounding tissue.