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

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.

Additive Effect of the Composition of Endophytic Bacteria on Systemic Resistance of Wheat against Greenbug Aphid Due to Lipopeptides.

The use of biocontrol agents based on endophytic bacteria against phloem-feeding insects is limited by a lack of knowledge and understanding of the mechanism of action of the endophyte community that makes up the plant microbiome. In this work, the mechanisms of the additive action of endophytic strains 26D and 11VM on the resistance of bread spring wheat against greenbug aphid was studied. It was shown that 26D secreted lipopeptide surfactin and phytohormones cytokinins, and 11VM produced iturin and auxins into the cultivation medium.

By Modulating the Hormonal Balance and Ribonuclease Activity of Tomato Plants Induces Defense Response against Potato Virus X and Potato Virus Y.

Endophytic plant-growth-promoting microorganisms can protect plants against pathogens, but they have rarely been investigated as potential biocontrol agents and triggers of induced systemic resistance (ISR), regulated by phytohormones, against viruses. We studied the role of endophytic strains 26D and Ttl2, which secrete ribonucleases and phytohormones, in the induction of tomato plant resistance against potato virus X and potato virus Y in a greenhouse condition. The endophytes reduced the accumulation of viruses in plants, increased the activity of plant ribonucleases and recovered the fruit yield of infected tomato plants.