Effect of a Genetically Modified Rhizobium meliloti Inoculant on the Development of Arbuscular Mycorrhizas, Root Morphology, Nutrient Uptake and Biomass Accumulation in Medicago sativa
A soil microcosm system was used to evaluate the impact of a genetically modified (GM) Rhizobium meliloti strain on development and function of arbuscular mycorrhiza in alfalfa plants (Medicago sativa L.). There was no indication that this GM Rhizobium strain, which had an enhanced nodulation compet...
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| Veröffentlicht in: | The New phytologist 1996-10, Vol.134 (2), p.361-369 |
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| container_title | The New phytologist |
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| creator | Barea, J. M. Tobar, R. M. Azcon-Aguilar, C. |
| description | A soil microcosm system was used to evaluate the impact of a genetically modified (GM) Rhizobium meliloti strain on development and function of arbuscular mycorrhiza in alfalfa plants (Medicago sativa L.). There was no indication that this GM Rhizobium strain, which had an enhanced nodulation competitiveness ability, interfered with mycorrhiza formation by Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe. Indeed, inoculation with the GM Rhizobium strain greatly increased the number of mycorrhizal entry points in the alfalfa root system in comparison to the wild-type strain. Mycorrhizal development and quality of nodulation increased with time and coincided with increased biomass of and nutrient (N, P) uptake by the host plant. The establishment of the symbiotic interactions also induced changes in root morphology; in particular, the degree of branching increased and the number of lateral roots was greater in plants inoculated with the GM Rhizobium strain. These results demonstrate that the GM Rhizobium strain does affect adversely the performance of arbuscular mycorrhizal symbiosis, a biosafety model system based on a functional rhizosphere. |
| doi_str_mv | 10.1111/j.1469-8137.1996.tb04641.x |
| format | Article |
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M. ; Tobar, R. M. ; Azcon-Aguilar, C.</creator><creatorcontrib>Barea, J. M. ; Tobar, R. M. ; Azcon-Aguilar, C.</creatorcontrib><description>A soil microcosm system was used to evaluate the impact of a genetically modified (GM) Rhizobium meliloti strain on development and function of arbuscular mycorrhiza in alfalfa plants (Medicago sativa L.). There was no indication that this GM Rhizobium strain, which had an enhanced nodulation competitiveness ability, interfered with mycorrhiza formation by Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe. Indeed, inoculation with the GM Rhizobium strain greatly increased the number of mycorrhizal entry points in the alfalfa root system in comparison to the wild-type strain. Mycorrhizal development and quality of nodulation increased with time and coincided with increased biomass of and nutrient (N, P) uptake by the host plant. The establishment of the symbiotic interactions also induced changes in root morphology; in particular, the degree of branching increased and the number of lateral roots was greater in plants inoculated with the GM Rhizobium strain. These results demonstrate that the GM Rhizobium strain does affect adversely the performance of arbuscular mycorrhizal symbiosis, a biosafety model system based on a functional rhizosphere.</description><identifier>ISSN: 0028-646X</identifier><identifier>EISSN: 1469-8137</identifier><identifier>DOI: 10.1111/j.1469-8137.1996.tb04641.x</identifier><identifier>CODEN: NEPHAV</identifier><language>eng</language><publisher>Oxford, UK: Cambridge University Press</publisher><subject>Agricultural soils ; Agronomy. Soil science and plant productions ; Alfalfa ; arbuscular mycorrhizas ; Biological and medical sciences ; biosafety ; Economic plant physiology ; Fundamental and applied biological sciences. Psychology ; genetically modified micro‐organisms ; Medicago sativa ; Mosses ; Parasitism and symbiosis ; Plant morphology ; Plant physiology and development ; Plant roots ; Plants ; Rhizobium ; Rhizobium meliloti ; root system morphology ; Root systems ; Sinorhizobium meliloti ; Symbiosis ; Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...) ; Transgenic plants</subject><ispartof>The New phytologist, 1996-10, Vol.134 (2), p.361-369</ispartof><rights>Copyright 1996 Trustees of The New Phytologist</rights><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4491-af5b36e49435142ebe337a3a91594b293a0da20ca60b640590de5663121c52893</citedby><cites>FETCH-LOGICAL-c4491-af5b36e49435142ebe337a3a91594b293a0da20ca60b640590de5663121c52893</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/2558776$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/2558776$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,27924,27925,58017,58250</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2473027$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Barea, J. M.</creatorcontrib><creatorcontrib>Tobar, R. M.</creatorcontrib><creatorcontrib>Azcon-Aguilar, C.</creatorcontrib><title>Effect of a Genetically Modified Rhizobium meliloti Inoculant on the Development of Arbuscular Mycorrhizas, Root Morphology, Nutrient Uptake and Biomass Accumulation in Medicago sativa</title><title>The New phytologist</title><description>A soil microcosm system was used to evaluate the impact of a genetically modified (GM) Rhizobium meliloti strain on development and function of arbuscular mycorrhiza in alfalfa plants (Medicago sativa L.). There was no indication that this GM Rhizobium strain, which had an enhanced nodulation competitiveness ability, interfered with mycorrhiza formation by Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe. Indeed, inoculation with the GM Rhizobium strain greatly increased the number of mycorrhizal entry points in the alfalfa root system in comparison to the wild-type strain. Mycorrhizal development and quality of nodulation increased with time and coincided with increased biomass of and nutrient (N, P) uptake by the host plant. The establishment of the symbiotic interactions also induced changes in root morphology; in particular, the degree of branching increased and the number of lateral roots was greater in plants inoculated with the GM Rhizobium strain. These results demonstrate that the GM Rhizobium strain does affect adversely the performance of arbuscular mycorrhizal symbiosis, a biosafety model system based on a functional rhizosphere.</description><subject>Agricultural soils</subject><subject>Agronomy. Soil science and plant productions</subject><subject>Alfalfa</subject><subject>arbuscular mycorrhizas</subject><subject>Biological and medical sciences</subject><subject>biosafety</subject><subject>Economic plant physiology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>genetically modified micro‐organisms</subject><subject>Medicago sativa</subject><subject>Mosses</subject><subject>Parasitism and symbiosis</subject><subject>Plant morphology</subject><subject>Plant physiology and development</subject><subject>Plant roots</subject><subject>Plants</subject><subject>Rhizobium</subject><subject>Rhizobium meliloti</subject><subject>root system morphology</subject><subject>Root systems</subject><subject>Sinorhizobium meliloti</subject><subject>Symbiosis</subject><subject>Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)</subject><subject>Transgenic plants</subject><issn>0028-646X</issn><issn>1469-8137</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1996</creationdate><recordtype>article</recordtype><recordid>eNqVkcFu1DAYhCMEEkvhDThYCHFqFjt2nDUHpKWUtlK3oIpK3CzH-dP14sTBdkrDk_F4OOyqnPHFkj3zzW9Plr0ieEnSertbEsZFviK0WhIh-DLWmHFGlvePssXD1eNsgXGxyjnj355mz0LYYYxFyYtF9vu0bUFH5Fqk0Bn0EI1W1k5o4xrTGmjQ9db8crUZO9SBNdZFgy56p0er-mTrUdwC-gh3YN3QQf-XtPb1GGaFR5tJO-8TQoVjdO1cTGA_bJ11t9MxuhqjN7PpZojqOyDVN-iDcZ0KAa21HrvEiCaFmB5toEmj3ToU0tGdep49aZUN8OKwH2U3n06_npznl5_PLk7Wl7lmTJBctWVNOTDBaElYATVQWimqBCkFqwtBFW5UgbXiuOYMlwI3UHJOSUF0WawEPcre7LmDdz9GCFF2Jmiw6fngxiATh1aMlEn4bi_U3oXgoZWDN53ykyRYzmXJnZwbkXMjci5LHsqS98n8-pCiQvr_1qtem_BAKFhFcVEl2fu97KexMP1HgLz6ck45SYCXe8AuROf_8ctyVVWc_gGw5LXq</recordid><startdate>199610</startdate><enddate>199610</enddate><creator>Barea, J. M.</creator><creator>Tobar, R. M.</creator><creator>Azcon-Aguilar, C.</creator><general>Cambridge University Press</general><general>Blackwell Publishing Ltd</general><general>Blackwell</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7SN</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>M7N</scope><scope>P64</scope></search><sort><creationdate>199610</creationdate><title>Effect of a Genetically Modified Rhizobium meliloti Inoculant on the Development of Arbuscular Mycorrhizas, Root Morphology, Nutrient Uptake and Biomass Accumulation in Medicago sativa</title><author>Barea, J. M. ; Tobar, R. M. ; Azcon-Aguilar, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4491-af5b36e49435142ebe337a3a91594b293a0da20ca60b640590de5663121c52893</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Agricultural soils</topic><topic>Agronomy. Soil science and plant productions</topic><topic>Alfalfa</topic><topic>arbuscular mycorrhizas</topic><topic>Biological and medical sciences</topic><topic>biosafety</topic><topic>Economic plant physiology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>genetically modified micro‐organisms</topic><topic>Medicago sativa</topic><topic>Mosses</topic><topic>Parasitism and symbiosis</topic><topic>Plant morphology</topic><topic>Plant physiology and development</topic><topic>Plant roots</topic><topic>Plants</topic><topic>Rhizobium</topic><topic>Rhizobium meliloti</topic><topic>root system morphology</topic><topic>Root systems</topic><topic>Sinorhizobium meliloti</topic><topic>Symbiosis</topic><topic>Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)</topic><topic>Transgenic plants</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Barea, J. M.</creatorcontrib><creatorcontrib>Tobar, R. M.</creatorcontrib><creatorcontrib>Azcon-Aguilar, C.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Ecology Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>The New phytologist</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Barea, J. M.</au><au>Tobar, R. M.</au><au>Azcon-Aguilar, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of a Genetically Modified Rhizobium meliloti Inoculant on the Development of Arbuscular Mycorrhizas, Root Morphology, Nutrient Uptake and Biomass Accumulation in Medicago sativa</atitle><jtitle>The New phytologist</jtitle><date>1996-10</date><risdate>1996</risdate><volume>134</volume><issue>2</issue><spage>361</spage><epage>369</epage><pages>361-369</pages><issn>0028-646X</issn><eissn>1469-8137</eissn><coden>NEPHAV</coden><abstract>A soil microcosm system was used to evaluate the impact of a genetically modified (GM) Rhizobium meliloti strain on development and function of arbuscular mycorrhiza in alfalfa plants (Medicago sativa L.). There was no indication that this GM Rhizobium strain, which had an enhanced nodulation competitiveness ability, interfered with mycorrhiza formation by Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe. Indeed, inoculation with the GM Rhizobium strain greatly increased the number of mycorrhizal entry points in the alfalfa root system in comparison to the wild-type strain. Mycorrhizal development and quality of nodulation increased with time and coincided with increased biomass of and nutrient (N, P) uptake by the host plant. The establishment of the symbiotic interactions also induced changes in root morphology; in particular, the degree of branching increased and the number of lateral roots was greater in plants inoculated with the GM Rhizobium strain. These results demonstrate that the GM Rhizobium strain does affect adversely the performance of arbuscular mycorrhizal symbiosis, a biosafety model system based on a functional rhizosphere.</abstract><cop>Oxford, UK</cop><pub>Cambridge University Press</pub><doi>10.1111/j.1469-8137.1996.tb04641.x</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | The New phytologist, 1996-10, Vol.134 (2), p.361-369 |
| issn | 0028-646X 1469-8137 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_15937415 |
| source | JSTOR Archive Collection A-Z Listing; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Agricultural soils Agronomy. Soil science and plant productions Alfalfa arbuscular mycorrhizas Biological and medical sciences biosafety Economic plant physiology Fundamental and applied biological sciences. Psychology genetically modified micro‐organisms Medicago sativa Mosses Parasitism and symbiosis Plant morphology Plant physiology and development Plant roots Plants Rhizobium Rhizobium meliloti root system morphology Root systems Sinorhizobium meliloti Symbiosis Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...) Transgenic plants |
| title | Effect of a Genetically Modified Rhizobium meliloti Inoculant on the Development of Arbuscular Mycorrhizas, Root Morphology, Nutrient Uptake and Biomass Accumulation in Medicago sativa |
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