Comprehensive assessment of potato bacterial pathogens and development of resistance improvement methods

Sevinj Maharramova, Maryam Mammadaliyeva, Mehriban Yusifova, Gunash Nasrullayeva, Yuliia Kolomiiets
Received: 24.12.2024 Revised: 13.05.2025 Accepted: 25.06.2025
Retrieved from Vol. 28, No. 7, 2025 Pages: 34-47
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Abstract

The study analysed the composition of potato bacterial pathogens and the effectiveness of different strategies for building crop resistance in agroecosystems. The study combined theoretical analysis of literature on pathogen properties and resistance mechanisms with experimental testing of its agrobiological methods under growing conditions for comparative evaluation of the effectiveness of controlling bacterial diseases of potatoes. The study determined that Ralstonia solanacearum showed the highest pathogenic activity under the experimental conditions, causing systemic wilt of plants. Pectobacterium carotovorum mainly affected tubers, forming foci of wet rot, while Clavibacter sepedonicus showed a slow infection process, which was more often diagnosed at the storage stage. The development of bacterial diseases of potatoes intensified under conditions of excessive soil moisture, temperatures above 27°C, mechanical damage and accumulation of organic residues. The formation of a stable rhizosphere microbiota, with the participation of representatives of the genera Pseudomonas and Bacillus, contributed to a 47-62% reduction in the sickness index and a 25-31% increase in vegetative mass compared to the control. Different tolerance mechanisms dominated in the studied varieties: vascular resistance in Solokha, which provided a 62% reduction in lesions, 31% weight gain and 2.2 additional tubers per plant. Dnepryanka showed a biochemical response, with a 3.1-fold increase in peroxidase activity and a 1.6-fold increase in phenylalanine ammonia lyase, and Lugovska showed a microbiological control, with a rhizosphere colonisation density of up to 1×105 colony-forming units per gram of soil and an increase in the number of tubers by 24. The obtained results are of practical importance for the development of integrated potato protection schemes that involve the use of bioagents and resistance inducers as an effective alternative to chemicals, as well as for the implementation of an early diagnostic monitoring system based on bioindicators in breeding and agricultural production technologies

Keywords

microbiota; soil; moisture; resistance; agroecosystem; endophytes; wilting

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Maharramova, S., Mammadaliyeva, M., Yusifova, M., Nasrullayeva, G., & Kolomiiets, Yu. (2025). Comprehensive assessment of potato bacterial pathogens and development of resistance improvement methods. Scientific Horizons, 28(7), 34-47. https://doi.org/10.48077/scihor7.2025.34