A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis
- Autores
- Riccillo, Pablo Miguel; Collavino, Mónica Mariana; Grasso, Daniel Horacio; England, Reg; Bruijn, Frans J. de; Aguilar, Orlando Mario
- Año de publicación
- 2000
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Rhizobium tropici strain CIAT899 displays a high intrinsic thermal tolerance, and had been used in this work to study the molecular basis of bacterial responses to high temperature. We generated a collection of R. tropici CIAT899 mutants affected in thermal tolerance using Tn5-luxAB mutagenesis and described the characterization of a mutant strain, CIAT899-10T, that fails to grow under conditions of high temperature. Strain CIAT899-10T carries a single transposon insertion in a gene showing a high degree of similarity with the guaB gene of Escherichia coli and other organisms, encoding the enzyme inosine monophosphate dehydrogenase. The guaB strain CIAT899-10T does not require guanine for growth due to an alternative pathway via xanthine dehydrogenase and, phenotypically, in addition to the thermal sensitivity, the mutant is also defective in symbiosis with beans, forming nodules that lack rhizobial content. Guanine and its precursors restore wild-type tolerance to grow at high temperature. Our data show that, in R. tropici, the production of guanine via inosine monophosphate dehydrogenase is essential for growth at extreme temperatures and for effective nodulation.
Facultad de Ciencias Exactas
Instituto de Biotecnologia y Biologia Molecular - Materia
-
Ciencias Exactas
Biología
guanine biosynthesis
nodule development
prototrophy - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/124099
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A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosisRiccillo, Pablo MiguelCollavino, Mónica MarianaGrasso, Daniel HoracioEngland, RegBruijn, Frans J. deAguilar, Orlando MarioCiencias ExactasBiologíaguanine biosynthesisnodule developmentprototrophy<i>Rhizobium tropici</i> strain CIAT899 displays a high intrinsic thermal tolerance, and had been used in this work to study the molecular basis of bacterial responses to high temperature. We generated a collection of <i>R. tropici</i> CIAT899 mutants affected in thermal tolerance using Tn5-<i>lux</i>AB mutagenesis and described the characterization of a mutant strain, CIAT899-10T, that fails to grow under conditions of high temperature. Strain CIAT899-10T carries a single transposon insertion in a gene showing a high degree of similarity with the <i>gua</i>B gene of <i>Escherichia coli</i> and other organisms, encoding the enzyme inosine monophosphate dehydrogenase. The <i>gua</i>B strain CIAT899-10T does not require guanine for growth due to an alternative pathway via xanthine dehydrogenase and, phenotypically, in addition to the thermal sensitivity, the mutant is also defective in symbiosis with beans, forming nodules that lack rhizobial content. Guanine and its precursors restore wild-type tolerance to grow at high temperature. Our data show that, in <i>R. tropici</i>, the production of guanine via inosine monophosphate dehydrogenase is essential for growth at extreme temperatures and for effective nodulation.Facultad de Ciencias ExactasInstituto de Biotecnologia y Biologia Molecular2000-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1228-1236http://sedici.unlp.edu.ar/handle/10915/124099enginfo:eu-repo/semantics/altIdentifier/issn/0894-0282info:eu-repo/semantics/altIdentifier/pmid/11059489info:eu-repo/semantics/altIdentifier/doi/10.1094/mpmi.2000.13.11.1228info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:29:33Zoai:sedici.unlp.edu.ar:10915/124099Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:33.681SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
title |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
spellingShingle |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis Riccillo, Pablo Miguel Ciencias Exactas Biología guanine biosynthesis nodule development prototrophy |
title_short |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
title_full |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
title_fullStr |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
title_full_unstemmed |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
title_sort |
A <i>gua</i>B mutant strain of <i>Rhizobium tropici</i> CIAT899 pleiotropically defective in thermal tolerance and symbiosis |
dc.creator.none.fl_str_mv |
Riccillo, Pablo Miguel Collavino, Mónica Mariana Grasso, Daniel Horacio England, Reg Bruijn, Frans J. de Aguilar, Orlando Mario |
author |
Riccillo, Pablo Miguel |
author_facet |
Riccillo, Pablo Miguel Collavino, Mónica Mariana Grasso, Daniel Horacio England, Reg Bruijn, Frans J. de Aguilar, Orlando Mario |
author_role |
author |
author2 |
Collavino, Mónica Mariana Grasso, Daniel Horacio England, Reg Bruijn, Frans J. de Aguilar, Orlando Mario |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Biología guanine biosynthesis nodule development prototrophy |
topic |
Ciencias Exactas Biología guanine biosynthesis nodule development prototrophy |
dc.description.none.fl_txt_mv |
<i>Rhizobium tropici</i> strain CIAT899 displays a high intrinsic thermal tolerance, and had been used in this work to study the molecular basis of bacterial responses to high temperature. We generated a collection of <i>R. tropici</i> CIAT899 mutants affected in thermal tolerance using Tn5-<i>lux</i>AB mutagenesis and described the characterization of a mutant strain, CIAT899-10T, that fails to grow under conditions of high temperature. Strain CIAT899-10T carries a single transposon insertion in a gene showing a high degree of similarity with the <i>gua</i>B gene of <i>Escherichia coli</i> and other organisms, encoding the enzyme inosine monophosphate dehydrogenase. The <i>gua</i>B strain CIAT899-10T does not require guanine for growth due to an alternative pathway via xanthine dehydrogenase and, phenotypically, in addition to the thermal sensitivity, the mutant is also defective in symbiosis with beans, forming nodules that lack rhizobial content. Guanine and its precursors restore wild-type tolerance to grow at high temperature. Our data show that, in <i>R. tropici</i>, the production of guanine via inosine monophosphate dehydrogenase is essential for growth at extreme temperatures and for effective nodulation. Facultad de Ciencias Exactas Instituto de Biotecnologia y Biologia Molecular |
description |
<i>Rhizobium tropici</i> strain CIAT899 displays a high intrinsic thermal tolerance, and had been used in this work to study the molecular basis of bacterial responses to high temperature. We generated a collection of <i>R. tropici</i> CIAT899 mutants affected in thermal tolerance using Tn5-<i>lux</i>AB mutagenesis and described the characterization of a mutant strain, CIAT899-10T, that fails to grow under conditions of high temperature. Strain CIAT899-10T carries a single transposon insertion in a gene showing a high degree of similarity with the <i>gua</i>B gene of <i>Escherichia coli</i> and other organisms, encoding the enzyme inosine monophosphate dehydrogenase. The <i>gua</i>B strain CIAT899-10T does not require guanine for growth due to an alternative pathway via xanthine dehydrogenase and, phenotypically, in addition to the thermal sensitivity, the mutant is also defective in symbiosis with beans, forming nodules that lack rhizobial content. Guanine and its precursors restore wild-type tolerance to grow at high temperature. Our data show that, in <i>R. tropici</i>, the production of guanine via inosine monophosphate dehydrogenase is essential for growth at extreme temperatures and for effective nodulation. |
publishDate |
2000 |
dc.date.none.fl_str_mv |
2000-11 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/124099 |
url |
http://sedici.unlp.edu.ar/handle/10915/124099 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0894-0282 info:eu-repo/semantics/altIdentifier/pmid/11059489 info:eu-repo/semantics/altIdentifier/doi/10.1094/mpmi.2000.13.11.1228 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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application/pdf 1228-1236 |
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