Phosphate Solubilization and Plant Growth Promotion by Soil Isolates

Overview

Journal Microorganisms

Specialty Microbiology

Date 2023 Jun 15

PMID 37317110

Authors

Aliya Suleimanova

Daria Bulmakova

Lidiya Sokolnikova

Evgenia Egorova

Daria Itkina

Olga Kuzminova

Albina Gizatullina

Margarita Sharipova

Affiliations

Soon will be listed here.

Abstract

Phosphate solubilizing microorganisms (PSMs) in soil have been shown to reduce mineral phosphate fertilizer supplementation and promote plant growth. Nevertheless, only several P-solubilizing microorganisms capable of solubilizing both organic and mineral sources of soil phosphorus have been identified up to now. The aim of this study was to evaluate the inorganic soil phosphate solubilizing activity of phytate-hydrolyzing soil isolates. We showed that the strains efficiently solubilize a variety of inorganic phosphates. We optimized the media composition and culturing conditions to improve the solubilization efficiency of the strains and investigated the mechanisms of their phosphate solubilization. Through HPLC analysis, it was determined that produce oxalic, malic, formic, malonic, lactic, maleic, acetic, and citric acids as well as acid and alkaline phosphatases while growing on insoluble phosphate sources. Finally, we analyzed the influence of strains with multiple PGP-treats on plant growth in greenhouse experiments and showed their ability to promote growth of potato.

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