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Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates

The use of plant growth promoting bacterial inoculants as live microbial biofertilizers provides a promising alternative to chemical fertilizers and pesticides. Inorganic phosphate solubilization is one of the major mechanisms of plant growth promotion by plant associated bacteria. This involves bac...

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Autores principales: Oteino, Nicholas, Lally, Richard D., Kiwanuka, Samuel, Lloyd, Andrew, Ryan, David, Germaine, Kieran J., Dowling, David N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510416/
https://www.ncbi.nlm.nih.gov/pubmed/26257721
http://dx.doi.org/10.3389/fmicb.2015.00745
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author Oteino, Nicholas
Lally, Richard D.
Kiwanuka, Samuel
Lloyd, Andrew
Ryan, David
Germaine, Kieran J.
Dowling, David N.
author_facet Oteino, Nicholas
Lally, Richard D.
Kiwanuka, Samuel
Lloyd, Andrew
Ryan, David
Germaine, Kieran J.
Dowling, David N.
author_sort Oteino, Nicholas
collection PubMed
description The use of plant growth promoting bacterial inoculants as live microbial biofertilizers provides a promising alternative to chemical fertilizers and pesticides. Inorganic phosphate solubilization is one of the major mechanisms of plant growth promotion by plant associated bacteria. This involves bacteria releasing organic acids into the soil which solubilize the phosphate complexes converting them into ortho-phosphate which is available for plant up-take and utilization. The study presented here describes the ability of endophytic bacteria to produce gluconic acid (GA), solubilize insoluble phosphate, and stimulate the growth of Pisum sativum L. plants. This study also describes the genetic systems within three of these endophyte strains thought to be responsible for their effective phosphate solubilizing abilities. The results showed that many of the endophytic strains produced GA (14–169 mM) and have moderate to high phosphate solubilization capacities (~400–1300 mg L(−1)). When inoculated into P. sativum L. plants grown in soil under soluble phosphate limiting conditions, the endophytes that produced medium-high levels of GA displayed beneficial plant growth promotion effects.
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spelling pubmed-45104162015-08-07 Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates Oteino, Nicholas Lally, Richard D. Kiwanuka, Samuel Lloyd, Andrew Ryan, David Germaine, Kieran J. Dowling, David N. Front Microbiol Plant Science The use of plant growth promoting bacterial inoculants as live microbial biofertilizers provides a promising alternative to chemical fertilizers and pesticides. Inorganic phosphate solubilization is one of the major mechanisms of plant growth promotion by plant associated bacteria. This involves bacteria releasing organic acids into the soil which solubilize the phosphate complexes converting them into ortho-phosphate which is available for plant up-take and utilization. The study presented here describes the ability of endophytic bacteria to produce gluconic acid (GA), solubilize insoluble phosphate, and stimulate the growth of Pisum sativum L. plants. This study also describes the genetic systems within three of these endophyte strains thought to be responsible for their effective phosphate solubilizing abilities. The results showed that many of the endophytic strains produced GA (14–169 mM) and have moderate to high phosphate solubilization capacities (~400–1300 mg L(−1)). When inoculated into P. sativum L. plants grown in soil under soluble phosphate limiting conditions, the endophytes that produced medium-high levels of GA displayed beneficial plant growth promotion effects. Frontiers Media S.A. 2015-07-22 /pmc/articles/PMC4510416/ /pubmed/26257721 http://dx.doi.org/10.3389/fmicb.2015.00745 Text en Copyright © 2015 Oteino, Lally, Kiwanuka, Lloyd, Ryan, Germaine and Dowling. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Oteino, Nicholas
Lally, Richard D.
Kiwanuka, Samuel
Lloyd, Andrew
Ryan, David
Germaine, Kieran J.
Dowling, David N.
Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates
title Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates
title_full Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates
title_fullStr Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates
title_full_unstemmed Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates
title_short Plant growth promotion induced by phosphate solubilizing endophytic Pseudomonas isolates
title_sort plant growth promotion induced by phosphate solubilizing endophytic pseudomonas isolates
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510416/
https://www.ncbi.nlm.nih.gov/pubmed/26257721
http://dx.doi.org/10.3389/fmicb.2015.00745
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