Effective and durable systemic wheat-induced resistance by a plant-growth-promoting rhizobacteria consortium of Paenibacillus sp. strain B2 and Arthrobacter spp. strain AA against Zymoseptoria tritici and drought stress

For a sustainable environment, plant-growth-promoting rhizobacteria (PGPR) are natural resources considering as one of the most important fungicides’ alternatives inducing resistance to plant diseases. The aim present work is investigate synergistic promotion effect PGPR mixture composed Paenibacillus sp. strain B2 (PB2) and Arthrobacter spp. AA (AA), referred hereafter Mix-2, on wheat growth, Zymoseptoria tritici (teleomorph Mycosphaerella graminicola), causal agent Septoria blotch (STB) drought stress. results quantitative real-time polymerase chain reaction (qPCR) showed helpful for wheat-root external internal colonization with PB2. Interestingly, in non-stress conditions, inoculation grains Mix-2 (PB2:AA, 1:1), at sowing, an increase almost all tested cultivars foliar root dry biomasses. Under stress, contrarily PB2 single inoculation, induced significant tolerance biomass length. On other hand, both alone against Z. least 50% protection efficiency cultivars. However, Mix-2-root -induced were observed mature growth stage. Moreover, Mix-2-induced characterized by upregulation gene markers basal defense, defense cell rescue, reactive oxygen species, jasmonic acid, phenylpropanoids & phytoalexins pathways. Pathogenesis-related protein 1 (PR1), chitinase, glucanase, flavonoides possible selection STB. To conclude, endophyte PGPR’ consortium promoter inducer durable-systemic genotype-independent