Abstract
The aim of this work was to investigate the ability of the SA to inhibit the growth of strains of Xanthomonas vesicatoria, Pseudomonas syringae pv. tomato and Clavibacter michiganensis subsp. michiganensis in nutrient media and suppress the development of bacterial black spot, bacterial spotting and bacterial cancer in tomato plants in terms of artificial infection.Methods. Virulence of strains of X. vesicatoria, P. syringae pv. tomato and C. michiganensis subsp. michiganensis in laboratory environment was determined by artificial infection of stalks and leaves of tomato plants by injection. Accounting of strains aggression was carried out using the 10-point scale. SA on bacteria was studied by perforation method.Result. The author has established antibacterial effect of salicylic acid on the pathogens of tomato bacterial cancer, black bacterial spot and bacterial spotting in the medium, and its potential possibilities of disease inhibition in terms of artificial inoculation. It is established an authoritative increase in areas of stunted growth of pathogen strains with salicylic acid in proportion with the increase of its concentration. SA application has reduced the degree of development of tomato bacterial diseases by 8–65 % in terms of the artificial inoculation. Spraying tomato plants with SA solution was more effective than root soaking.Conclusions. SA solutions showed high antibacterial activity against pathogens of bacterial cancer C. michiganensis subsp. michiganensis and bacterial black spot X. vesicatoria with no growth zone of 70–80 mm. Increased SA concentrations caused the increased effectiveness of inhibition of tomato plants bacterial diseases
Highlights
The problem of plant resistance against bacteriosis pathogens is one of the most important in modern horticulture
Materials and methods Virulence of selected strains of X. vesicatoria IS-30, IS-31, IS-34, P. syringae pv. tomato IS-28, IS-46 and C. michiganensis subsp. michiganensis IS-38, IS-40 in laboratory environment was determined by artificial infection of stalks and leaves of tomato plants by injection
Results of the research As a result of artificial infection of young tomato seedlings it was found that isolated strains X. vesicatoria IS-30, IS-31, IS-34, P. syringae pv. tomato IS-28, IS-46, and C. michiganensis subsp. michiganensis IS-38, IS-40 result in the appearance of symptoms of plant infestation
Summary
The problem of plant resistance against bacteriosis pathogens is one of the most important in modern horticulture In this regard, compounds increasing the stability of plant varieties by mobilizing their natural defense mechanisms are increasingly used, in particular salicylic acid (SA). SA is one of the key molecules involved in the formation of immune response and systemic induced plant resistance against bacterial diseases. It is accumulated in infected areas of plants, transported by phloem and concentrated in remote uninfected leaves, where, in turn, takes place the expression of protective genes responsible for the structural and functional plant protection from stress [1]. NO-synthase – SA promotes NO-induced salicylatedependent formation of mRNA protein PR1, and MAPkinase – SA associated with the induction of the kinase isoforms SIPK and adenyl cyclase system [2]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
