The biological factors of plant-induced system resistance generally include two broad categories, namely classical plant-induced resistance to disease induction (PGPR) or fungi that promote plant growth (PGPF), and plant growth-promoting rhizosphere bacteria (PGPR) or plant growth promoting fungi (PGPF). The difference is mainly due to the fact that the latter can effectively promote plant growth and increase crop yield while causing (or increasing) plant resistance to diseases (sometimes including pests).[10]