info:eu-repo/semantics/article
Exploring the response of Actinobacteria to the presence of phosphorus salts sources: Metabolic and co-metabolic processes
Fecha
2019-05Registro en:
Solans, Mariana; Messuti, Maria Ines; Reiner, Gabriela de Las Nieves; Boenel, Micaela; Vobis, Gernot; et al.; Exploring the response of Actinobacteria to the presence of phosphorus salts sources: Metabolic and co-metabolic processes; Wiley VCH Verlag; Journal of Basic Microbiology; 59; 5; 5-2019; 487-495
0233-111X
CONICET Digital
CONICET
Autor
Solans, Mariana
Messuti, Maria Ines
Reiner, Gabriela de Las Nieves
Boenel, Micaela
Vobis, Gernot
Wall, Luis Gabriel
Scervino, Jose Martin
Resumen
This study tested the solubilization of phosphorus by five actinobacterial strains in liquid media containing Ca 3 PO 4 ; AlPO 4 or FePO 4 as the sole phosphate source, and discusses the possible mechanisms involved in this process. P solubilization by different strains was accompanied by a significant drop in pH from 7.0 to 2.15–5.0 after 14 days. The efficiency of different strains depended on the P-source. Streptomyces spp. MM140 and MM141 were the most efficient in solubilizing Ca 3 PO 4 , MM136, and MM141 were the most efficient in solubilizing AlPO 4 , while all strains were equally efficient in solubilizing FePO 4 . Gluconic, oxalic, citric, malic, succinic, formic, and acetic acid were detected in the medium with Ca 3 PO 4 , while all except acetic acid were detected in the media with FePO 4 or AlPO 4 . Although we did not use an organic source of phosphorus in the media, all strains produced acid and alkaline phosphatase. It is concluded from this study that actinobacteria produced multiple organic acids followed by a decrease in the pH to solubilize phosphate salts. As well as producing phosphatase, these microorganisms were found to have different ways of making P available, suggesting an ecological advantage as they form part of soil microbiomes important for plants.