Increasing Potato Sustainability to PVY under Water Deficiency by Bacillus Bacteria with Salicylic Acid and Methyl Jasmonate

Abstract

The protective effect of Bacillus bacteria against viruses can be significantly expanded by combination with salicylic acid (SA) or methyl jasmonate (MeJ). In soil water deficiency conditions, potato leaves were sprayed with Bacillus subtilis strain 47 combined with MeJ and MeJ + SA displayed a decrease in PVY and preservation of the shoot’s growth. Signaling molecules with Bacillus subtilis mitigated the adverse effect of PVY under water deficiency by manipulating enzymatic/non-enzymatic antioxidant levels and activity in treated plants. The application mixtures increased the mass and number of mini-tubers during the microclonal propagation of plants. Treatment with bacteria in combination with signaling molecules significantly changed the content and phosphorylation status of a number of hydrolases, catalase, phosphorylase, annexin, and protease inhibitor. Based on the analysis of changes in the proteome, the key mechanisms mediating the induction of plant resistance to change in the tuber proteome aimed at enhancing the expression of protective protein genes that increase resistance to pathogens and abiotic stress.