Type B Response Regulators of Arabidopsis Play Key Roles in Cytokinin Signaling and Plant Development
The type B Arabidopsis Response Regulators (ARRs) of Arabidopsis thaliana are transcription factors that act as positive regulators in the two-component cytokinin signaling pathway. We employed a mutant-based approach to perform a detailed characterization of the roles of ARR1, ARR10, and ARR12 in p...
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| Veröffentlicht in: | The Plant cell 2008-08, Vol.20 (8), p.2102-2116 |
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| creator | Argyros, Rebecca D Mathews, Dennis E Chiang, Yi-Hsuan Palmer, Christine M Thibault, Derek M Etheridge, Naomi Argyros, D. Aaron Mason, Michael G Kieber, Joseph J Schaller, G. Eric |
| description | The type B Arabidopsis Response Regulators (ARRs) of Arabidopsis thaliana are transcription factors that act as positive regulators in the two-component cytokinin signaling pathway. We employed a mutant-based approach to perform a detailed characterization of the roles of ARR1, ARR10, and ARR12 in plant growth and development. The most pronounced phenotype was found in the arr1-3 arr10-5 arr12-1 triple loss-of-function mutant, which showed almost complete insensitivity to high levels of exogenously applied cytokinins. The triple mutant exhibited reduced stature due to decreased cell division in the shoot, enhanced seed size, increased sensitivity to light, altered chlorophyll and anthocyanin concentrations, and an aborted primary root with protoxylem but no metaxylem. Microarray analysis revealed that expression of the majority of cytokinin-regulated genes requires the function of ARR1, ARR10, and ARR12. Characterization of double mutants revealed differing contributions of the type B ARRs to mutant phenotypes. Our results support a model in which cytokinin regulates a wide array of downstream responses through the action of a multistep phosphorelay that culminates in transcriptional regulation by ARR1, ARR10, and ARR12. |
| doi_str_mv | 10.1105/tpc.108.059584 |
| format | Article |
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Aaron ; Mason, Michael G ; Kieber, Joseph J ; Schaller, G. Eric</creator><creatorcontrib>Argyros, Rebecca D ; Mathews, Dennis E ; Chiang, Yi-Hsuan ; Palmer, Christine M ; Thibault, Derek M ; Etheridge, Naomi ; Argyros, D. Aaron ; Mason, Michael G ; Kieber, Joseph J ; Schaller, G. Eric</creatorcontrib><description>The type B Arabidopsis Response Regulators (ARRs) of Arabidopsis thaliana are transcription factors that act as positive regulators in the two-component cytokinin signaling pathway. We employed a mutant-based approach to perform a detailed characterization of the roles of ARR1, ARR10, and ARR12 in plant growth and development. The most pronounced phenotype was found in the arr1-3 arr10-5 arr12-1 triple loss-of-function mutant, which showed almost complete insensitivity to high levels of exogenously applied cytokinins. The triple mutant exhibited reduced stature due to decreased cell division in the shoot, enhanced seed size, increased sensitivity to light, altered chlorophyll and anthocyanin concentrations, and an aborted primary root with protoxylem but no metaxylem. Microarray analysis revealed that expression of the majority of cytokinin-regulated genes requires the function of ARR1, ARR10, and ARR12. Characterization of double mutants revealed differing contributions of the type B ARRs to mutant phenotypes. Our results support a model in which cytokinin regulates a wide array of downstream responses through the action of a multistep phosphorelay that culminates in transcriptional regulation by ARR1, ARR10, and ARR12.</description><identifier>ISSN: 1040-4651</identifier><identifier>ISSN: 1532-298X</identifier><identifier>EISSN: 1532-298X</identifier><identifier>DOI: 10.1105/tpc.108.059584</identifier><identifier>PMID: 18723577</identifier><language>eng</language><publisher>United States: American Society of Plant Biologists</publisher><subject>Arabidopsis - genetics ; Arabidopsis - growth & development ; Arabidopsis - metabolism ; Arabidopsis Proteins - genetics ; Arabidopsis Proteins - metabolism ; Arabidopsis Proteins - physiology ; Cell division ; Chlorophylls ; Cytokinins ; Cytokinins - metabolism ; Cytokinins - physiology ; DNA-Binding Proteins - genetics ; DNA-Binding Proteins - metabolism ; DNA-Binding Proteins - physiology ; Gene Expression Regulation, Developmental ; Gene Expression Regulation, Plant ; Genes ; Hypocotyl - genetics ; Hypocotyl - growth & development ; Hypocotyl - metabolism ; Hypocotyls ; Models, Genetic ; Mutants ; Plant cells ; Plant growth ; Plant roots ; Plant Roots - genetics ; Plant Roots - growth & development ; Plant Roots - metabolism ; Plant Shoots - genetics ; Plant Shoots - growth & development ; Plant Shoots - metabolism ; Plants ; Receptors ; Reverse Transcriptase Polymerase Chain Reaction ; Seedlings ; Signal Transduction - genetics ; Signal Transduction - physiology ; Transcription Factors - genetics ; Transcription Factors - metabolism ; Transcription Factors - physiology</subject><ispartof>The Plant cell, 2008-08, Vol.20 (8), p.2102-2116</ispartof><rights>Copyright 2008 American Society of Plant Biologists</rights><rights>Copyright American Society of Plant Biologists Aug 2008</rights><rights>Copyright © 2008, American Society of Plant Biologists</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c560t-e6f20bde17cc92edcd17f61166f89626238d09c595326206d96b3be0dd1d6c5d3</citedby><cites>FETCH-LOGICAL-c560t-e6f20bde17cc92edcd17f61166f89626238d09c595326206d96b3be0dd1d6c5d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/25224317$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/25224317$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,780,784,803,885,27924,27925,58017,58250</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18723577$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Argyros, Rebecca D</creatorcontrib><creatorcontrib>Mathews, Dennis E</creatorcontrib><creatorcontrib>Chiang, Yi-Hsuan</creatorcontrib><creatorcontrib>Palmer, Christine M</creatorcontrib><creatorcontrib>Thibault, Derek M</creatorcontrib><creatorcontrib>Etheridge, Naomi</creatorcontrib><creatorcontrib>Argyros, D. Aaron</creatorcontrib><creatorcontrib>Mason, Michael G</creatorcontrib><creatorcontrib>Kieber, Joseph J</creatorcontrib><creatorcontrib>Schaller, G. Eric</creatorcontrib><title>Type B Response Regulators of Arabidopsis Play Key Roles in Cytokinin Signaling and Plant Development</title><title>The Plant cell</title><addtitle>Plant Cell</addtitle><description>The type B Arabidopsis Response Regulators (ARRs) of Arabidopsis thaliana are transcription factors that act as positive regulators in the two-component cytokinin signaling pathway. We employed a mutant-based approach to perform a detailed characterization of the roles of ARR1, ARR10, and ARR12 in plant growth and development. The most pronounced phenotype was found in the arr1-3 arr10-5 arr12-1 triple loss-of-function mutant, which showed almost complete insensitivity to high levels of exogenously applied cytokinins. The triple mutant exhibited reduced stature due to decreased cell division in the shoot, enhanced seed size, increased sensitivity to light, altered chlorophyll and anthocyanin concentrations, and an aborted primary root with protoxylem but no metaxylem. Microarray analysis revealed that expression of the majority of cytokinin-regulated genes requires the function of ARR1, ARR10, and ARR12. Characterization of double mutants revealed differing contributions of the type B ARRs to mutant phenotypes. Our results support a model in which cytokinin regulates a wide array of downstream responses through the action of a multistep phosphorelay that culminates in transcriptional regulation by ARR1, ARR10, and ARR12.</description><subject>Arabidopsis - genetics</subject><subject>Arabidopsis - growth & development</subject><subject>Arabidopsis - metabolism</subject><subject>Arabidopsis Proteins - genetics</subject><subject>Arabidopsis Proteins - metabolism</subject><subject>Arabidopsis Proteins - physiology</subject><subject>Cell division</subject><subject>Chlorophylls</subject><subject>Cytokinins</subject><subject>Cytokinins - metabolism</subject><subject>Cytokinins - physiology</subject><subject>DNA-Binding Proteins - genetics</subject><subject>DNA-Binding Proteins - metabolism</subject><subject>DNA-Binding Proteins - physiology</subject><subject>Gene Expression Regulation, Developmental</subject><subject>Gene Expression Regulation, Plant</subject><subject>Genes</subject><subject>Hypocotyl - genetics</subject><subject>Hypocotyl - growth & development</subject><subject>Hypocotyl - metabolism</subject><subject>Hypocotyls</subject><subject>Models, Genetic</subject><subject>Mutants</subject><subject>Plant cells</subject><subject>Plant growth</subject><subject>Plant roots</subject><subject>Plant Roots - genetics</subject><subject>Plant Roots - growth & development</subject><subject>Plant Roots - metabolism</subject><subject>Plant Shoots - genetics</subject><subject>Plant Shoots - growth & development</subject><subject>Plant Shoots - metabolism</subject><subject>Plants</subject><subject>Receptors</subject><subject>Reverse Transcriptase Polymerase Chain Reaction</subject><subject>Seedlings</subject><subject>Signal Transduction - genetics</subject><subject>Signal Transduction - physiology</subject><subject>Transcription Factors - genetics</subject><subject>Transcription Factors - metabolism</subject><subject>Transcription Factors - physiology</subject><issn>1040-4651</issn><issn>1532-298X</issn><issn>1532-298X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNpdkc1v1DAQxS1ERcvClRtgceCWZWzHjnOpVJaPIiqB-iFxs5zYCV6ycbCTSvnv6yWrUjj5WfPz-M08hF4QWBMC_N041GsCcg285DJ_hE4IZzSjpfzxOGnIIcsFJ8foaYxbACAFKZ-gYyILynhRnCB7PQ8Wv8eXNg6-jzaJdur06EPEvsFnQVfO-CG6iL93esZf7YwvfWcjdj3ezKP_5fqkrlzb6871Lda92ZP9iD_YW9v5YWf78Rk6anQX7fPDuUI3nz5eb86zi2-fv2zOLrKaCxgzKxoKlbGkqOuSWlMbUjSCECEaWQoqKJMGyjqNytIFhClFxSoLxhAjam7YCp0ufYep2qX36eugOzUEt9NhVl479W-ldz9V628V5ZwJUqQGbw8Ngv892TiqnYu17dJA1k9RiWSDFpIl8M1_4NZPIe0gKkqkBNhveIXWC1QHH2Owzb0TAmofn0rxJS3VEl968Oqh_7_4Ia8EvFyAbUwR3dcppzRnf_y_XuqN9kq3wUV1c0WBMCA8L9Le2B0lWKoF</recordid><startdate>20080801</startdate><enddate>20080801</enddate><creator>Argyros, Rebecca D</creator><creator>Mathews, Dennis E</creator><creator>Chiang, Yi-Hsuan</creator><creator>Palmer, Christine M</creator><creator>Thibault, Derek M</creator><creator>Etheridge, Naomi</creator><creator>Argyros, D. 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Aaron</au><au>Mason, Michael G</au><au>Kieber, Joseph J</au><au>Schaller, G. Eric</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Type B Response Regulators of Arabidopsis Play Key Roles in Cytokinin Signaling and Plant Development</atitle><jtitle>The Plant cell</jtitle><addtitle>Plant Cell</addtitle><date>2008-08-01</date><risdate>2008</risdate><volume>20</volume><issue>8</issue><spage>2102</spage><epage>2116</epage><pages>2102-2116</pages><issn>1040-4651</issn><issn>1532-298X</issn><eissn>1532-298X</eissn><abstract>The type B Arabidopsis Response Regulators (ARRs) of Arabidopsis thaliana are transcription factors that act as positive regulators in the two-component cytokinin signaling pathway. We employed a mutant-based approach to perform a detailed characterization of the roles of ARR1, ARR10, and ARR12 in plant growth and development. The most pronounced phenotype was found in the arr1-3 arr10-5 arr12-1 triple loss-of-function mutant, which showed almost complete insensitivity to high levels of exogenously applied cytokinins. The triple mutant exhibited reduced stature due to decreased cell division in the shoot, enhanced seed size, increased sensitivity to light, altered chlorophyll and anthocyanin concentrations, and an aborted primary root with protoxylem but no metaxylem. Microarray analysis revealed that expression of the majority of cytokinin-regulated genes requires the function of ARR1, ARR10, and ARR12. Characterization of double mutants revealed differing contributions of the type B ARRs to mutant phenotypes. Our results support a model in which cytokinin regulates a wide array of downstream responses through the action of a multistep phosphorelay that culminates in transcriptional regulation by ARR1, ARR10, and ARR12.</abstract><cop>United States</cop><pub>American Society of Plant Biologists</pub><pmid>18723577</pmid><doi>10.1105/tpc.108.059584</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | The Plant cell, 2008-08, Vol.20 (8), p.2102-2116 |
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| subjects | Arabidopsis - genetics Arabidopsis - growth & development Arabidopsis - metabolism Arabidopsis Proteins - genetics Arabidopsis Proteins - metabolism Arabidopsis Proteins - physiology Cell division Chlorophylls Cytokinins Cytokinins - metabolism Cytokinins - physiology DNA-Binding Proteins - genetics DNA-Binding Proteins - metabolism DNA-Binding Proteins - physiology Gene Expression Regulation, Developmental Gene Expression Regulation, Plant Genes Hypocotyl - genetics Hypocotyl - growth & development Hypocotyl - metabolism Hypocotyls Models, Genetic Mutants Plant cells Plant growth Plant roots Plant Roots - genetics Plant Roots - growth & development Plant Roots - metabolism Plant Shoots - genetics Plant Shoots - growth & development Plant Shoots - metabolism Plants Receptors Reverse Transcriptase Polymerase Chain Reaction Seedlings Signal Transduction - genetics Signal Transduction - physiology Transcription Factors - genetics Transcription Factors - metabolism Transcription Factors - physiology |
| title | Type B Response Regulators of Arabidopsis Play Key Roles in Cytokinin Signaling and Plant Development |
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