Soil P solubilization and plant growth promotion by a saline-alkali-tolerant P-solubilizing bacterium, <i>Bacillus</i> sp. DYS211

Abstract High total P content but insufficient available in soil is an obstacle that restricts the efficient utilization of saline-alkali regions. Although resistant P-solubilizing bacteria (PSB) solubilize insoluble P, few studies have focused on their application plant growth. We isolated a PSB strain, identified as Bacillus sp. DYS211, from bird droppings regions and determined its growth characteristics resistance to salt alkalis. To investigate effect germination seeds, we performed potting experiment using Suaeda salsa with added. The strain grew rapidly first 12 h, solubilized reached maximum 258.22 mg L -1 at 48 h. Saline-alkali tolerance ability tests showed DYS211 preferred dissolve inorganic was halophilic, had good 1%‒8% salinity (available &amp;gt;150 -1). It exhibited solubilization abilities when glucose sucrose were used C sources or ammonium sulfate, nitrate, yeast extract powder N sources. In promotion test, increased seed germination, particularly under high stress, growth-promotion 8.33%. also improved S. salsa, including height biomass (up three times) both saline alkaline conditions, stem diameter stress. This demonstrates potential for vegetation restoration