Two bacterial strains isolated from a Zn-polluted soil enhance plant growth and mycorrhizal efficiency under Zn-toxicity.
Identifieur interne : 003490 ( Main/Corpus ); précédent : 003489; suivant : 003491Two bacterial strains isolated from a Zn-polluted soil enhance plant growth and mycorrhizal efficiency under Zn-toxicity.
Auteurs : A. Vivas ; B. Bir ; J M Ruíz-Lozano ; J M Barea ; R. Azc NSource :
- Chemosphere [ 0045-6535 ] ; 2006.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : DNA, Bacterial, Soil Pollutants, Zinc.
- growth & development : Mycorrhizae, Trifolium.
- isolation & purification : Rhizobium.
- microbiology : Trifolium.
- Biodegradation, Environmental, Soil Microbiology, Symbiosis.
Abstract
In this study we investigated the interactions among plant, rhizosphere microorganisms and Zn pollution. We tested the influence of two bacterial strains isolated from a Zn-polluted soil on plant growth and on the symbiotic efficiency of native arbuscular mycorrhizal fungi (AMF) under Zn toxicity. The two bacterial strains exhibited Zn tolerance when cultivated under increasing Zn levels in the medium. However, strain B-I showed a higher Zn tolerance than strain B-II at the two highest Zn levels in the medium (75 and 100 mg l(-1) Zn). Molecular identification placed the strain B-I within the genus Brevibacillus. Our results showed that bacterial strain B-I consistently enhanced plant growth, N and P accumulation, as well as nodule number and mycorrhizal infection which demonstrated its plant-growth promoting (PGP) activity. This strain B-I has been shown to produce IAA (3.95 microg ml) and to accumulate 5.6% of Zn from the growing medium. The enhanced growth and nutrition of plants dually inoculated with the AMF and bacterium B-I was observed at three Zn levels assayed. This effect can be related to the stimulation of symbiotic structures (nodules and AMF colonization) and a decreased Zn concentration in plant tissues. The amount of Zn acquired per root weight unit was reduced by each one of these bacterial strains or AMF and particularly by the mixed bacterium-AMF inocula. These mechanisms explain the alleviation of Zn toxicity by selected microorganisms and indicate that metal-adapted bacteria and AMF play a key role enhancing plant growth under soil Zn contamination.
DOI: 10.1016/j.chemosphere.2005.06.053
PubMed: 16098559
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pubmed:16098559Le document en format XML
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Azc N</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2006">2006</date><idno type="RBID">pubmed:16098559</idno><idno type="pmid">16098559</idno><idno type="doi">10.1016/j.chemosphere.2005.06.053</idno><idno type="wicri:Area/Main/Corpus">003490</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003490</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Two bacterial strains isolated from a Zn-polluted soil enhance plant growth and mycorrhizal efficiency under Zn-toxicity.</title><author><name sortKey="Vivas, A" sort="Vivas, A" uniqKey="Vivas A" first="A" last="Vivas">A. Vivas</name><affiliation><nlm:affiliation>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, Prof. Albareda, 1, 18008 Granada, Spain.</nlm:affiliation></affiliation></author><author><name sortKey="Bir, B" sort="Bir, B" uniqKey="Bir B" first="B" last="Bir">B. Bir</name></author><author><name sortKey="Ruiz Lozano, J M" sort="Ruiz Lozano, J M" uniqKey="Ruiz Lozano J" first="J M" last="Ruíz-Lozano">J M Ruíz-Lozano</name></author><author><name sortKey="Barea, J M" sort="Barea, J M" uniqKey="Barea J" first="J M" last="Barea">J M Barea</name></author><author><name sortKey="Azc N, R" sort="Azc N, R" uniqKey="Azc N R" first="R" last="Azc N">R. Azc N</name></author></analytic><series><title level="j">Chemosphere</title><idno type="ISSN">0045-6535</idno><imprint><date when="2006" type="published">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biodegradation, Environmental (MeSH)</term><term>DNA, Bacterial (analysis)</term><term>Mycorrhizae (growth & development)</term><term>Rhizobium (isolation & purification)</term><term>Soil Microbiology (MeSH)</term><term>Soil Pollutants (analysis)</term><term>Symbiosis (MeSH)</term><term>Trifolium (growth & development)</term><term>Trifolium (microbiology)</term><term>Zinc (analysis)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>DNA, Bacterial</term><term>Soil Pollutants</term><term>Zinc</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Mycorrhizae</term><term>Trifolium</term></keywords><keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Rhizobium</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Trifolium</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Biodegradation, Environmental</term><term>Soil Microbiology</term><term>Symbiosis</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this study we investigated the interactions among plant, rhizosphere microorganisms and Zn pollution. We tested the influence of two bacterial strains isolated from a Zn-polluted soil on plant growth and on the symbiotic efficiency of native arbuscular mycorrhizal fungi (AMF) under Zn toxicity. The two bacterial strains exhibited Zn tolerance when cultivated under increasing Zn levels in the medium. However, strain B-I showed a higher Zn tolerance than strain B-II at the two highest Zn levels in the medium (75 and 100 mg l(-1) Zn). Molecular identification placed the strain B-I within the genus Brevibacillus. Our results showed that bacterial strain B-I consistently enhanced plant growth, N and P accumulation, as well as nodule number and mycorrhizal infection which demonstrated its plant-growth promoting (PGP) activity. This strain B-I has been shown to produce IAA (3.95 microg ml) and to accumulate 5.6% of Zn from the growing medium. The enhanced growth and nutrition of plants dually inoculated with the AMF and bacterium B-I was observed at three Zn levels assayed. This effect can be related to the stimulation of symbiotic structures (nodules and AMF colonization) and a decreased Zn concentration in plant tissues. The amount of Zn acquired per root weight unit was reduced by each one of these bacterial strains or AMF and particularly by the mixed bacterium-AMF inocula. These mechanisms explain the alleviation of Zn toxicity by selected microorganisms and indicate that metal-adapted bacteria and AMF play a key role enhancing plant growth under soil Zn contamination.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16098559</PMID><DateCompleted><Year>2006</Year><Month>04</Month><Day>14</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0045-6535</ISSN><JournalIssue CitedMedium="Print"><Volume>62</Volume><Issue>9</Issue><PubDate><Year>2006</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Chemosphere</Title><ISOAbbreviation>Chemosphere</ISOAbbreviation></Journal><ArticleTitle>Two bacterial strains isolated from a Zn-polluted soil enhance plant growth and mycorrhizal efficiency under Zn-toxicity.</ArticleTitle><Pagination><MedlinePgn>1523-33</MedlinePgn></Pagination><Abstract><AbstractText>In this study we investigated the interactions among plant, rhizosphere microorganisms and Zn pollution. We tested the influence of two bacterial strains isolated from a Zn-polluted soil on plant growth and on the symbiotic efficiency of native arbuscular mycorrhizal fungi (AMF) under Zn toxicity. The two bacterial strains exhibited Zn tolerance when cultivated under increasing Zn levels in the medium. However, strain B-I showed a higher Zn tolerance than strain B-II at the two highest Zn levels in the medium (75 and 100 mg l(-1) Zn). Molecular identification placed the strain B-I within the genus Brevibacillus. Our results showed that bacterial strain B-I consistently enhanced plant growth, N and P accumulation, as well as nodule number and mycorrhizal infection which demonstrated its plant-growth promoting (PGP) activity. This strain B-I has been shown to produce IAA (3.95 microg ml) and to accumulate 5.6% of Zn from the growing medium. The enhanced growth and nutrition of plants dually inoculated with the AMF and bacterium B-I was observed at three Zn levels assayed. This effect can be related to the stimulation of symbiotic structures (nodules and AMF colonization) and a decreased Zn concentration in plant tissues. The amount of Zn acquired per root weight unit was reduced by each one of these bacterial strains or AMF and particularly by the mixed bacterium-AMF inocula. These mechanisms explain the alleviation of Zn toxicity by selected microorganisms and indicate that metal-adapted bacteria and AMF play a key role enhancing plant growth under soil Zn contamination.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Vivas</LastName><ForeName>A</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, Prof. Albareda, 1, 18008 Granada, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Biró</LastName><ForeName>B</ForeName><Initials>B</Initials></Author><Author ValidYN="Y"><LastName>Ruíz-Lozano</LastName><ForeName>J M</ForeName><Initials>JM</Initials></Author><Author ValidYN="Y"><LastName>Barea</LastName><ForeName>J M</ForeName><Initials>JM</Initials></Author><Author ValidYN="Y"><LastName>Azcón</LastName><ForeName>R</ForeName><Initials>R</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2005</Year><Month>08</Month><Day>10</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Chemosphere</MedlineTA><NlmUniqueID>0320657</NlmUniqueID><ISSNLinking>0045-6535</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D004269">DNA, Bacterial</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012989">Soil Pollutants</NameOfSubstance></Chemical><Chemical><RegistryNumber>J41CSQ7QDS</RegistryNumber><NameOfSubstance UI="D015032">Zinc</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001673" MajorTopicYN="N">Biodegradation, Environmental</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004269" MajorTopicYN="N">DNA, Bacterial</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012231" MajorTopicYN="N">Rhizobium</DescriptorName><QualifierName UI="Q000302" MajorTopicYN="Y">isolation & purification</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012988" MajorTopicYN="Y">Soil Microbiology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012989" MajorTopicYN="N">Soil Pollutants</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013559" MajorTopicYN="N">Symbiosis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D029921" MajorTopicYN="N">Trifolium</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D015032" MajorTopicYN="N">Zinc</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2005</Year><Month>04</Month><Day>25</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2005</Year><Month>06</Month><Day>15</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2005</Year><Month>06</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2005</Year><Month>8</Month><Day>16</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2006</Year><Month>4</Month><Day>15</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2005</Year><Month>8</Month><Day>16</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">16098559</ArticleId><ArticleId IdType="pii">S0045-6535(05)00878-7</ArticleId><ArticleId IdType="doi">10.1016/j.chemosphere.2005.06.053</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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