Stimulation of the Defense Mechanisms of Potatoes to a Late Blight Causative Agent When Treated with Bacillus subtilis Bacteria and Chitosan Composites with Hydroxycinnamic Acids

Author:

Yarullina Liubov12,Cherepanova Ekaterina A.1ORCID,Burkhanova Guzel F.1ORCID,Sorokan Antonina V.1,Zaikina Evgenia A.1,Tsvetkov Vyacheslav O.2,Mardanshin Ildar S.3,Fatkullin Ildus Y.1,Kalatskaja Joanna N.4,Yalouskaya Ninel A.4,Nikalaichuk Victoria V.5

Affiliation:

1. Institute of Biochemistry and Genetics, Ufa Federal Research Centre, Russian Academy of Sciences, 450054 Ufa, Russia

2. Department of Biology, Ufa University of Science and Technology, 450076 Ufa, Russia

3. Bashkir Research Institute of Agriculture, Ufa Federal Research Center, Russian Academy of Sciences, 450054 Ufa, Russia

4. Institute of Experimental Botany Named after V. F. Kuprevich of the National Academy of Sciences of Belarus, 220072 Minsk, Belarus

5. Institute of New Materials Chemistry, National Academy of Sciences of Belarus, 220141 Minsk, Belarus

Abstract

Phytophthora infestans is, worldwide, one of the main causal agents of epiphytotics in potato plantings. Prevention strategies demand integrated pest management, including modeling of beneficial microbiomes of agroecosystems combining microorganisms and natural products. Chitooligosaccharides and their derivatives have great potential to be used by agrotechnology due to their ability to elicit plant immune reactions. The effect of combining Bacillus subtilis 26D and 11VM and conjugates of chitin with hydroxycinnamates on late blight pathogenesis was evaluated. Mechanisms for increasing the resistance of potato plants to Phytophthora infestans were associated with the activation of the antioxidant system of plants and an increase in the level of gene transcripts that encode PR proteins: basic protective protein (PR-1), thaumatin-like protein (PR-5), protease inhibitor (PR-6), and peroxidase (PR-9). The revealed activation of the expression of marker genes of systemic acquired resistance and induced systemic resistance under the influence of the combined treatment of plants with B. subtilis and conjugates of chitin with hydroxycinnamates indicates that, in this case, the development of protective reactions in potato plants to late blight proceeds synergistically, where B. subtilis primes protective genes, and chitosan composites act as a trigger for their expression.

Funder

Russian Scientific Foundation

Publisher

MDPI AG

Subject

Virology,Microbiology (medical),Microbiology

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