Symbiotic properties of 5-methyltryptophan-resistant mutants of Bradyrhizobium japonicum
The effect that resistance to 5-methyltryptophan (MT) has on the symbiotic properties of B. japonicum was examined in a survey of fourteen clones. Resistance to MT often involves a mutational alteration in the regulation of tryptophan biosynthesis. Resistant clones (MTR) were isolated from agar plat...
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| Veröffentlicht in: | Plant and soil 1995-06, Vol.173 (2), p.293-298 |
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| creator | Hunter, W.J. (Soil-Plant Nutrient Research Unit USDA-ARS, Fort Collins, CO (USA)) Kuykendall, L.D |
| description | The effect that resistance to 5-methyltryptophan (MT) has on the symbiotic properties of B. japonicum was examined in a survey of fourteen clones. Resistance to MT often involves a mutational alteration in the regulation of tryptophan biosynthesis. Resistant clones (MTR) were isolated from agar plates containing MT. In the selection process care was taken to avoid pigmented clones that are likely to accumulate large amounts of indole compounds or show increased tryptophan catabolism. Wild-type control clones (WTC) were isolated from plates containing no selective agent. In greenhouse studies, Tracy-M soybean plants were inoculated with the two types of clones. After six weeks, plants which were inoculated with the MT resistant clones showed a much greater range of symbiotic effectiveness than did plants that received the control clones. While most MT-resistant clones were poor symbionts or unchanged in their symbiotic performance, one clone was obtained that had significantly improved symbiotic properties. The procedure may offer a way of selecting for clones with improved symbiotic performance. These results also indicate a link between tryptophan biosynthesis and symbiotic effectiveness. |
| doi_str_mv | 10.1007/BF00011467 |
| format | Article |
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(Soil-Plant Nutrient Research Unit USDA-ARS, Fort Collins, CO (USA)) ; Kuykendall, L.D</creator><creatorcontrib>Hunter, W.J. (Soil-Plant Nutrient Research Unit USDA-ARS, Fort Collins, CO (USA)) ; Kuykendall, L.D</creatorcontrib><description>The effect that resistance to 5-methyltryptophan (MT) has on the symbiotic properties of B. japonicum was examined in a survey of fourteen clones. Resistance to MT often involves a mutational alteration in the regulation of tryptophan biosynthesis. Resistant clones (MTR) were isolated from agar plates containing MT. In the selection process care was taken to avoid pigmented clones that are likely to accumulate large amounts of indole compounds or show increased tryptophan catabolism. Wild-type control clones (WTC) were isolated from plates containing no selective agent. In greenhouse studies, Tracy-M soybean plants were inoculated with the two types of clones. After six weeks, plants which were inoculated with the MT resistant clones showed a much greater range of symbiotic effectiveness than did plants that received the control clones. While most MT-resistant clones were poor symbionts or unchanged in their symbiotic performance, one clone was obtained that had significantly improved symbiotic properties. The procedure may offer a way of selecting for clones with improved symbiotic performance. These results also indicate a link between tryptophan biosynthesis and symbiotic effectiveness.</description><identifier>ISSN: 0032-079X</identifier><identifier>EISSN: 1573-5036</identifier><identifier>DOI: 10.1007/BF00011467</identifier><identifier>CODEN: PLSOA2</identifier><language>eng</language><publisher>Dordrecht: Kluwer Academic Publishers</publisher><subject>Agronomy. Soil science and plant productions ; Bacteriology ; Biological and medical sciences ; Biosynthesis ; Biotechnology ; Bradyrhizobium ; BRADYRHIZOBIUM JAPONICUM ; Catabolism ; Economic plant physiology ; FIJACION DEL NITROGENO ; FIXATION DE L'AZOTE ; Fundamental and applied biological sciences. Psychology ; Genetics ; Indoles ; Microbiology ; NITROGEN FIXATION ; Nodulation ; Nodules ; Plant growth regulators ; Plants ; Soybeans ; Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...) ; TRIPTOFANO ; TRYPTOPHAN ; TRYPTOPHANE</subject><ispartof>Plant and soil, 1995-06, Vol.173 (2), p.293-298</ispartof><rights>1995 Kluwer Academic Publishers</rights><rights>1995 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c330t-62cff604b46f26f74e57db7740cd7b7165126f5ce92727eb84be55f2bb566be13</citedby><cites>FETCH-LOGICAL-c330t-62cff604b46f26f74e57db7740cd7b7165126f5ce92727eb84be55f2bb566be13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/42947534$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/42947534$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,27923,27924,58016,58249</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3623301$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Hunter, W.J. (Soil-Plant Nutrient Research Unit USDA-ARS, Fort Collins, CO (USA))</creatorcontrib><creatorcontrib>Kuykendall, L.D</creatorcontrib><title>Symbiotic properties of 5-methyltryptophan-resistant mutants of Bradyrhizobium japonicum</title><title>Plant and soil</title><description>The effect that resistance to 5-methyltryptophan (MT) has on the symbiotic properties of B. japonicum was examined in a survey of fourteen clones. Resistance to MT often involves a mutational alteration in the regulation of tryptophan biosynthesis. Resistant clones (MTR) were isolated from agar plates containing MT. In the selection process care was taken to avoid pigmented clones that are likely to accumulate large amounts of indole compounds or show increased tryptophan catabolism. Wild-type control clones (WTC) were isolated from plates containing no selective agent. In greenhouse studies, Tracy-M soybean plants were inoculated with the two types of clones. After six weeks, plants which were inoculated with the MT resistant clones showed a much greater range of symbiotic effectiveness than did plants that received the control clones. While most MT-resistant clones were poor symbionts or unchanged in their symbiotic performance, one clone was obtained that had significantly improved symbiotic properties. The procedure may offer a way of selecting for clones with improved symbiotic performance. These results also indicate a link between tryptophan biosynthesis and symbiotic effectiveness.</description><subject>Agronomy. Soil science and plant productions</subject><subject>Bacteriology</subject><subject>Biological and medical sciences</subject><subject>Biosynthesis</subject><subject>Biotechnology</subject><subject>Bradyrhizobium</subject><subject>BRADYRHIZOBIUM JAPONICUM</subject><subject>Catabolism</subject><subject>Economic plant physiology</subject><subject>FIJACION DEL NITROGENO</subject><subject>FIXATION DE L'AZOTE</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Genetics</subject><subject>Indoles</subject><subject>Microbiology</subject><subject>NITROGEN FIXATION</subject><subject>Nodulation</subject><subject>Nodules</subject><subject>Plant growth regulators</subject><subject>Plants</subject><subject>Soybeans</subject><subject>Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)</subject><subject>TRIPTOFANO</subject><subject>TRYPTOPHAN</subject><subject>TRYPTOPHANE</subject><issn>0032-079X</issn><issn>1573-5036</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1995</creationdate><recordtype>article</recordtype><recordid>eNpFkM1LxDAQxYMouH5cPApCD-JBqE6aL_foLq4Kix5U8FaSbOJmaZuapIf619u6oqdh5v3mzWMQOsFwhQHE9WwBABhTLnbQBDNBcgaE76IJAClyENP3fXQQ4wbGHvMJen_pa-V8cjprg29NSM7EzNuM5bVJ675KoW-Tb9eyyYOJLibZpKzuxvLDzYJc9WHtvrxyXZ1tZOsbp7v6CO1ZWUVz_FsP0dvi7nX-kC-f7x_nt8tcEwIp54W2lgNVlNuCW0ENEyslBAW9EkpgzvAwZtpMC1EIo26oMozZQinGuTKYHKKLre8Q_7MzMZW1i9pUlWyM72KJBWBBOB_Ayy2og48xGFu2wdUy9CWGcnxe-f-8AT7_dZVRy8oG2WgX_zYIL4b04_GzLbaJyYc_mRZTKhihg3661a30pfwIg8XTcsqAwSB_A8PDgVo</recordid><startdate>19950601</startdate><enddate>19950601</enddate><creator>Hunter, W.J. 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Soil science and plant productions</topic><topic>Bacteriology</topic><topic>Biological and medical sciences</topic><topic>Biosynthesis</topic><topic>Biotechnology</topic><topic>Bradyrhizobium</topic><topic>BRADYRHIZOBIUM JAPONICUM</topic><topic>Catabolism</topic><topic>Economic plant physiology</topic><topic>FIJACION DEL NITROGENO</topic><topic>FIXATION DE L'AZOTE</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Genetics</topic><topic>Indoles</topic><topic>Microbiology</topic><topic>NITROGEN FIXATION</topic><topic>Nodulation</topic><topic>Nodules</topic><topic>Plant growth regulators</topic><topic>Plants</topic><topic>Soybeans</topic><topic>Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)</topic><topic>TRIPTOFANO</topic><topic>TRYPTOPHAN</topic><topic>TRYPTOPHANE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hunter, W.J. 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(Soil-Plant Nutrient Research Unit USDA-ARS, Fort Collins, CO (USA))</au><au>Kuykendall, L.D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Symbiotic properties of 5-methyltryptophan-resistant mutants of Bradyrhizobium japonicum</atitle><jtitle>Plant and soil</jtitle><date>1995-06-01</date><risdate>1995</risdate><volume>173</volume><issue>2</issue><spage>293</spage><epage>298</epage><pages>293-298</pages><issn>0032-079X</issn><eissn>1573-5036</eissn><coden>PLSOA2</coden><abstract>The effect that resistance to 5-methyltryptophan (MT) has on the symbiotic properties of B. japonicum was examined in a survey of fourteen clones. Resistance to MT often involves a mutational alteration in the regulation of tryptophan biosynthesis. Resistant clones (MTR) were isolated from agar plates containing MT. In the selection process care was taken to avoid pigmented clones that are likely to accumulate large amounts of indole compounds or show increased tryptophan catabolism. Wild-type control clones (WTC) were isolated from plates containing no selective agent. In greenhouse studies, Tracy-M soybean plants were inoculated with the two types of clones. After six weeks, plants which were inoculated with the MT resistant clones showed a much greater range of symbiotic effectiveness than did plants that received the control clones. While most MT-resistant clones were poor symbionts or unchanged in their symbiotic performance, one clone was obtained that had significantly improved symbiotic properties. The procedure may offer a way of selecting for clones with improved symbiotic performance. These results also indicate a link between tryptophan biosynthesis and symbiotic effectiveness.</abstract><cop>Dordrecht</cop><pub>Kluwer Academic Publishers</pub><doi>10.1007/BF00011467</doi><tpages>6</tpages></addata></record> |
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| ispartof | Plant and soil, 1995-06, Vol.173 (2), p.293-298 |
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| source | JSTOR Archive Collection A-Z Listing; SpringerLink Journals - AutoHoldings |
| subjects | Agronomy. Soil science and plant productions Bacteriology Biological and medical sciences Biosynthesis Biotechnology Bradyrhizobium BRADYRHIZOBIUM JAPONICUM Catabolism Economic plant physiology FIJACION DEL NITROGENO FIXATION DE L'AZOTE Fundamental and applied biological sciences. Psychology Genetics Indoles Microbiology NITROGEN FIXATION Nodulation Nodules Plant growth regulators Plants Soybeans Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...) TRIPTOFANO TRYPTOPHAN TRYPTOPHANE |
| title | Symbiotic properties of 5-methyltryptophan-resistant mutants of Bradyrhizobium japonicum |
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