Inoculation with phosphate‐solubilizing bacteria alters microbial community and activates soil phosphorus supply to promote maize growth

Abstract

Phosphorus (P) is one of the essential macronutrients for plants, but agricultural soil generally lacks available P. This study aims to ascertain the impact of phosphatesolubilizing bacterial inoculation on the development of maize, soil characteristics, P fractions, and the microbial population in the soil. In this experiment, we explored the P solubilizing ability of P-solubilizing bacteria through liquid culture. In a maize pot experiment, soil P fractions and maize growth were examined, and a metagenomic sequence was constructed to analyze the soil microbial community and gene abundances and to link their relationship. In the shaking flask culture experiment, it was found that the Burkholderia (XQP35) and Raoultella (SQP80) have a strong capability for calcium phosphate and calcium phytate. Compared with the blank control, the XQP35 and SQP80 treatments could improve maize biomass and the soil nutrient status. Moreover, SQP80 treatments increased the soil acid phosphatase activity. SQP80 inoculation dramatically decreased the variety of the soil microbial community and the abundance of Acidobacteria. We found that the different treatments had no significant effect on the number of genes but that the SQP80 treatments significantly increased the P-cycling pathway gene family phoA and phoD compared with the CK treatment. Our results demonstrated that inoculation with XQP35 and SQP80 could dissolve varieties of insoluble P and, together with functional pathways of P-cycling, promote the transformation of P fractions and ultimately increase soil

Identification and Characterization of a Phosphate-Solubilizing Bacterium and Its Growth-Promoting Effect on Moso Bamboo Seedlings

“…In this study, RW37 isolated from the rhizosphere soils of P. edulis in acidic and Pdeficient regions was identified as Enterobacter soli. The ability to solubilize insoluble phosphate has been confirmed in several bacteria, including Burkholderia, Bacillus, Pseudomonas, Enterobacter, and Erwinia [29][30][31]. The Enterobacter genus is commonly found in different soil types and may have a significant impact on the P cycle in natural environments [32,33].…”

Screening and identification of plant growth promoting bacteria and their influence on soil heavy metal forms

“…However, most of the phosphorus in the soil is in an insoluble form and is di cult for plants to access directly 19 . Fortunately, phosphorus-dissolving probiotic bacteria can dissolve the insoluble organic and inorganic phosphorus in the soil and convert it to water-soluble phosphorus, increasing the soluble phosphorus content of the soil and promoting phosphorus uptake by plants 20 . The phosphorus solubilizing ability of the strains studied here was evaluated according to the phosphorus solubilizing circles produced, as shown in Table 4.…”

The Growth-Promoting and Colonization of the Pine Endophytic Pseudomonas abietaniphila for Pine Wilt Disease Control

“…PGPEs' functions in plants stability has become well known [12]. Microbial activity can directly stimulate plant growth through various mechanisms, including the production of molecules that solubilize inorganic phosphorus and potassium [13], the generation of siderophores [14], nitrogen fixation [15], and the biosynthesis of phytohormones such as gibberellins, cytokinins, and auxin (indole acetic acid) [16]. Additionally, microbes contribute to plant growth by synthesizing alginate, a highly stable, water-structured sugar molecule, and the enzyme 1-aminocyclopropane-1-carboxylate deaminase [17], further supporting plant development [18,19].…”