Screening, Resistance and Growth Promotion of Endophytic Bacteria with ACC Deaminase Activity in Platycodon Grandiflorum
Phosphorus is one of the three indispensable elements in the process of plant growth and development. Phosphorus deficiency in soil is an important factor limiting agricultural production. Microorganisms with different phosphorus-dissolving capabilities in the soil can rely on their own metabolites or biological synergy to dissolve insoluble inorganic phosphorus in the soil, improve soil phosphorus utilization, and play an important role in phosphorus conversion. Recent studies have shown that many phosphorus-dissolving microorganisms in the rhizosphere, phosphate mining areas, and special habitats of plants can also convert phosphorus into an absorbable state. The development and utilization of a huge resource treasurehouse of phosphorus-dissolving microorganisms can reduce soil compaction and enhance crops. It plays an important role in resisting diseases, repairing saline-alkali land, heavy metal pollution, and maintaining the ecological environment. So far, no research has been done on endophytic bacteria of platycodon grandiflorum in different regions. In view of this, this paper intends to isolate, screen, and identify endophytic strains of Platycodon grandiflorum in different regions, in order to find Phosphorus-soluble, resistant and proliferative Strains provide resources and scientific basis for the development and utilization of rhizobium-soluble endophytic bacteria resources.