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Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System
Belowground microorganisms are known to influence plants' performance by altering the soil environment. Plant pathogens such as cyanide-producing strains of the rhizobacterium Pseudomonas may show strong host-plant selectivity. We analyzed interactions between different host plants and Pseudomo...
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Formato: | Texto |
Lenguaje: | English |
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Public Library of Science
2007
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1952140/ https://www.ncbi.nlm.nih.gov/pubmed/17786217 http://dx.doi.org/10.1371/journal.pone.0000846 |
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author | Zeller, Simon L. Brandl, Helmut Schmid, Bernhard |
author_facet | Zeller, Simon L. Brandl, Helmut Schmid, Bernhard |
author_sort | Zeller, Simon L. |
collection | PubMed |
description | Belowground microorganisms are known to influence plants' performance by altering the soil environment. Plant pathogens such as cyanide-producing strains of the rhizobacterium Pseudomonas may show strong host-plant selectivity. We analyzed interactions between different host plants and Pseudomonas strains and tested if these can be linked to the cyanide sensitivity of host plants, the cyanide production of bacterial strains or the plant identity from which strains had been isolated. Eight strains (four cyanide producing) were isolated from roots of four weed species and then re-inoculated on the four weed and two additional crop species. Bacterial strain composition varied strongly among the four weed species. Although all six plant species showed different reductions in root growth when cyanide was artificially applied to seedlings, they were generally not negatively affected by inoculation with cyanide-producing bacterial strains. We found a highly significant plant species x bacterial strain interaction. Partitioning this interaction into contrasts showed that it was entirely due to a strongly negative effect of a bacterial strain (Pseudomonas kilonensis/brassicacearum, isolated from Galium mollugo) on Echinochloa crus-galli. This exotic weed may not have become adapted to the bacterial strain isolated from a native weed. Our findings suggest that host-specific rhizobacteria hold some promise as biological weed-control agents. |
format | Text |
id | pubmed-1952140 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-19521402007-09-05 Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System Zeller, Simon L. Brandl, Helmut Schmid, Bernhard PLoS One Research Article Belowground microorganisms are known to influence plants' performance by altering the soil environment. Plant pathogens such as cyanide-producing strains of the rhizobacterium Pseudomonas may show strong host-plant selectivity. We analyzed interactions between different host plants and Pseudomonas strains and tested if these can be linked to the cyanide sensitivity of host plants, the cyanide production of bacterial strains or the plant identity from which strains had been isolated. Eight strains (four cyanide producing) were isolated from roots of four weed species and then re-inoculated on the four weed and two additional crop species. Bacterial strain composition varied strongly among the four weed species. Although all six plant species showed different reductions in root growth when cyanide was artificially applied to seedlings, they were generally not negatively affected by inoculation with cyanide-producing bacterial strains. We found a highly significant plant species x bacterial strain interaction. Partitioning this interaction into contrasts showed that it was entirely due to a strongly negative effect of a bacterial strain (Pseudomonas kilonensis/brassicacearum, isolated from Galium mollugo) on Echinochloa crus-galli. This exotic weed may not have become adapted to the bacterial strain isolated from a native weed. Our findings suggest that host-specific rhizobacteria hold some promise as biological weed-control agents. Public Library of Science 2007-09-05 /pmc/articles/PMC1952140/ /pubmed/17786217 http://dx.doi.org/10.1371/journal.pone.0000846 Text en Zeller et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Zeller, Simon L. Brandl, Helmut Schmid, Bernhard Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System |
title | Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System |
title_full | Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System |
title_fullStr | Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System |
title_full_unstemmed | Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System |
title_short | Host-Plant Selectivity of Rhizobacteria in a Crop/Weed Model System |
title_sort | host-plant selectivity of rhizobacteria in a crop/weed model system |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1952140/ https://www.ncbi.nlm.nih.gov/pubmed/17786217 http://dx.doi.org/10.1371/journal.pone.0000846 |
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