<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The capacity of four bacterial strains isolated from productive soil potato fields to solubilize tricalcium phosphate on Pikovskaya agar or in a liquid medium was evaluated. A bacterial strain was selected to evaluate <italic>in vitro</italic> capacity of plant-growth promotion on <italic>Solanum tuberosum</italic> L. culture. Bacterial strain A3 showed the highest value of phosphate solubilization, reaching a 20 mm-diameter halo and a concentration of 350 mg/l on agar and in a liquid medium, respectively. Bacterial strain A3 was identified by 16S rDNA analysis as <italic>Bacillus pumilus</italic> with 98% identity; therefore, it is the first report for <italic>Bacillus pumilus</italic> as phosphate solubilizer. Plant-growth promotion assayed by <italic>in vitro</italic> culture of potato microplants showed that the addition of bacterial strain A3 increased root and stems length after 28 days. It significantly increased stem length by 79.3%, and duplicated the fresh weight of control microplants. In this paper, results reported regarding phosphorus solubilization and growth promotion under <italic>in vitro</italic> conditions represent a step forward in the use of innocuous bacterial strain biofertilizer on potato field cultures.</p></abstract>

The capacity of four bacterial strains isolated from productive soil potato fields to solubilize tricalcium phosphate on Pikovskaya agar or in a liquid medium was evaluated. A bacterial strain was selected to evaluate in vitro capacity of plant-growth promotion on Solanum tuberosum L. culture. Bacterial strain A3 showed the highest value of phosphate solubilization, reaching a 20 mm-diameter halo and a concentration of 350 mg/l on agar and in a liquid medium, respectively. Bacterial strain A3 was identified by 16S rDNA analysis as Bacillus pumilus with 98% identity; therefore, it is the first report for Bacillus pumilus as phosphate solubilizer. Plant-growth promotion assayed by in vitro culture of potato microplants showed that the addition of bacterial strain A3 increased root and stems length after 28 days. It significantly increased stem length by 79.3%, and duplicated the fresh weight of control microplants. In this paper, results reported regarding phosphorus solubilization and growth promotion under in vitro conditions represent a step forward in the use of innocuous bacterial strain biofertilizer on potato field cultures.

Isolated Phosphate-Solubilizing Soil Bacteria Promotes <italic>In vitro</italic> Growth of <italic>Solanum tuberosum</italic> L.

Polish Journal of Microbiology

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Isolated Phosphate-Solubilizing Soil Bacteria Promotes  Growth of  L.

The capacity of four bacterial strains isolated from productive soil potato fields to solubilize tricalcium phosphate on Pikovskaya agar or in a liquid medium...

Isolated Phosphate-Solubilizing Soil Bacteria Promotes In vitro Growth of Solanum tuberosum L.

Article Category: original-paper

Publié en ligne: 08 sept. 2020

Pages: 357 - 365

Reçu: 04 juin 2020

Accepté: 15 août 2020

DOI: https://doi.org/10.33073/pjm-2020-039

Mots clés
sp., phosphorus soluble, Pikovskaya agar, potato rhizosphere, plant growth promoting rhizobacteria

© 2020 Gustavo Yañez-Ocampo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Isolated Phosphate-Solubilizing Soil Bacteria Promotes In vitro Growth of Solanum tuberosum L.

Article Category: original-paper

Publié en ligne: 08 sept. 2020

Pages: 357 - 365

Reçu: 04 juin 2020

Accepté: 15 août 2020

DOI: https://doi.org/10.33073/pjm-2020-039

Mots cléssp., phosphorus soluble, Pikovskaya agar, potato rhizosphere, plant growth promoting rhizobacteria

© 2020 Gustavo Yañez-Ocampo et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mots clés
sp., phosphorus soluble, Pikovskaya agar, potato rhizosphere, plant growth promoting rhizobacteria