Journal ArticleDOI
Role of bacterial pyrroloquinoline quinone in phosphate solubilizing ability and in plant growth promotion on strain Serratia sp. S119
Liliana Mercedes Ludueña,María Soledad Anzuay,Jorge Guillermo Angelini,Germán Barros,María Flavia Luna,Maria del Pilar Monge,Adriana Fabra,Tania Taurian +7 more
TLDR
Plants growth parameters showed no differences among the different treatments indicating that PQQ from Serratia sp.Abstract:
The aim of this study was to analyze if cofactor pyrroquinoline quinone from Serratia sp. S119 is involved in the inorganic phosphate solubilization mechanism and in its ability to promote the plant growth. Site directed mutagenesis was performed to obtain a pqqE- minus mutant of strain Serratia sp. S119. The phosphate solubilization ability, gluconate and PQQ production of the mutant Serratia sp. RSL (pqqE-) was analyzed. Mutant RSL (pqqE-) showed significant decrease in P soluble and gluconic acid levels produced and undetectable levels of PQQ cofactor compared with wild-type strain. Complementation with synthetic PQQ cofactor restored P solubilization and gluconate production reaching the levels produced by wild-type strain. PqqE gene sequence indicated that it is highly conserved within Serratia strains and its product shows conserved motifs found in other PqqE proteins of several bacteria. The effect of the inoculation of the PQQ- mutant on peanut and maize plants was evaluated in pot assays. Plants growth parameters showed no differences among the different treatments indicating that PQQ from Serratia sp. S119 is not involved in the growth promotion of these plants. PQQ cofactor is essential for phosphate solubilization ability of Serratia sp. S119 but is not required for growth promotion of peanut and maize plants.read more
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Journal ArticleDOI
Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake
TL;DR: In this article, a review of different mechanisms and modes of action of phosphate-solubilizing microorganisms, their contribution to phosphorus solubilization, growth-promoting attributes in plants, and the molecular aspects of phosphatization are discussed.
Journal ArticleDOI
Growth promotion of peanut (Arachis hypogaea L.) and maize (Zea mays L.) plants by single and mixed cultures of efficient phosphate solubilizing bacteria that are tolerant to abiotic stress and pesticides
María Soledad Anzuay,María Gabriela Ruiz Ciancio,Liliana Mercedes Ludueña,Jorge Guillermo Angelini,Germán Barros,Nicolás Pastor,Tania Taurian +6 more
TL;DR: Six native peanut bacteria used in this study showed efficient phosphate mineralizing and solubilization ability and would be potential P-biofertilizers for peanut and maize.
Journal ArticleDOI
Enhanced biodegradation of atrazine by Arthrobacter sp. DNS10 during co-culture with a phosphorus solubilizing bacteria: Enterobacter sp. P1.
TL;DR: The results suggest that nondegrader strain P1 could promote the atrazine biodegradation when co-cultured with strain DNS10, and the pH of the medium was significantly decreased when strain P 1 utilized ethylamine and isopropylamine as the nitrogen source for growth.
Journal ArticleDOI
Integration of molecular tools in microbial phosphate solubilization research in agriculture perspective.
TL;DR: In this review, information on the molecular approaches for the PSMs research is provided and its importance explained, and the genes related to phosphate solubilizing mechanisms and molecular tools for screening these genes are discussed.
Journal ArticleDOI
Effects of P limitation and molecules from peanut root exudates on pqqE gene expression and pqq promoter activity in the phosphate-solubilizing strain Serratia sp. S119.
Liliana Mercedes Ludueña,María Soledad Anzuay,Cynthia Magallanes-Noguera,María Laura Tonelli,Fernando Ibáñez,Jorge Guillermo Angelini,Adriana Fabra,Matthew McIntosh,Tania Taurian +8 more
TL;DR: It is concluded that the response of Serratia sp.
References
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