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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Poplar <italic>FT2</italic> Shortens the Juvenile Phase and Promotes Seasonal Flowering<xref ref-type="fn" rid="fn1">[W]</xref></title><author><name sortKey="Hsu, Chuan Yu" sort="Hsu, Chuan Yu" uniqKey="Hsu C" first="Chuan-Yu" last="Hsu">Chuan-Yu Hsu</name><affiliation><nlm:aff id="aff1">Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author><author><name sortKey="Liu, Yunxia" sort="Liu, Yunxia" uniqKey="Liu Y" first="Yunxia" last="Liu">Yunxia Liu</name><affiliation><nlm:aff id="aff1">Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author><author><name sortKey="Luthe, Dawn S" sort="Luthe, Dawn S" uniqKey="Luthe D" first="Dawn S." last="Luthe">Dawn S. Luthe</name><affiliation><nlm:aff id="aff2">Department of Biochemistry and Molecular Biology, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author><author><name sortKey="Yuceer, Cetin" sort="Yuceer, Cetin" uniqKey="Yuceer C" first="Cetin" last="Yuceer">Cetin Yuceer</name><affiliation><nlm:aff id="aff1">Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">16844908</idno><idno type="pmc">1533980</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1533980</idno><idno type="RBID">PMC:1533980</idno><idno type="doi">10.1105/tpc.106.041038</idno><date when="2006">2006</date><idno type="wicri:Area/Pmc/Corpus">000793</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Poplar <italic>FT2</italic> Shortens the Juvenile Phase and Promotes Seasonal Flowering<xref ref-type="fn" rid="fn1">[W]</xref></title><author><name sortKey="Hsu, Chuan Yu" sort="Hsu, Chuan Yu" uniqKey="Hsu C" first="Chuan-Yu" last="Hsu">Chuan-Yu Hsu</name><affiliation><nlm:aff id="aff1">Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author><author><name sortKey="Liu, Yunxia" sort="Liu, Yunxia" uniqKey="Liu Y" first="Yunxia" last="Liu">Yunxia Liu</name><affiliation><nlm:aff id="aff1">Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author><author><name sortKey="Luthe, Dawn S" sort="Luthe, Dawn S" uniqKey="Luthe D" first="Dawn S." last="Luthe">Dawn S. Luthe</name><affiliation><nlm:aff id="aff2">Department of Biochemistry and Molecular Biology, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author><author><name sortKey="Yuceer, Cetin" sort="Yuceer, Cetin" uniqKey="Yuceer C" first="Cetin" last="Yuceer">Cetin Yuceer</name><affiliation><nlm:aff id="aff1">Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</nlm:aff></affiliation></author></analytic><series><title level="j">The Plant Cell</title><idno type="ISSN">1040-4651</idno><idno type="eISSN">1532-298X</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Many woody perennials, such as poplar (<italic>Populus deltoides</italic>), are not able to form flower buds during the first several years of their life cycle. They must undergo a transition from the juvenile phase to the reproductive phase to be competent to produce flower buds. After this transition, trees begin to form flower buds in the spring of each growing season. The genetic factors that control flower initiation, ending the juvenile phase, are unknown in poplar. The factors that regulate seasonal flower bud formation are also unknown. Here, we report that poplar <italic>FLOWERING LOCUS T2</italic> (<italic>FT2</italic>), a relative of the <italic>Arabidopsis thaliana</italic> flowering-time gene <italic>FT</italic>, controls first-time and seasonal flowering in poplar. The <italic>FT2</italic> transcript is rare during the juvenile phase of poplar. When juvenile poplar is transformed with <italic>FT2</italic> and transcript levels are increased, flowering is induced within 1 year. During the transition between vegetative and reproductive growth in mature trees, <italic>FT2</italic> transcripts are abundant during reproductive growth under long days. Subsequently, floral meristems emerge on flanks of the axillary inflorescence shoots. These findings suggest that <italic>FT2</italic> is part of the flower initiation pathway in poplar and plays an additional role in regulating seasonal flower initiation that is integrated with the poplar perennial growth habit.</p></div></front></TEI><pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Plant Cell</journal-id><journal-title>The Plant Cell</journal-title><issn pub-type="ppub">1040-4651</issn><issn pub-type="epub">1532-298X</issn><publisher><publisher-name>American Society of Plant Biologists</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">16844908</article-id><article-id pub-id-type="pmc">1533980</article-id><article-id pub-id-type="publisher-id">041038</article-id><article-id pub-id-type="doi">10.1105/tpc.106.041038</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Articles</subject></subj-group></article-categories><title-group><article-title>Poplar <italic>FT2</italic> Shortens the Juvenile Phase and Promotes Seasonal Flowering<xref ref-type="fn" rid="fn1">[W]</xref></article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Hsu</surname><given-names>Chuan-Yu</given-names></name><xref ref-type="aff" rid="aff1">a</xref></contrib><contrib contrib-type="author"><name><surname>Liu</surname><given-names>Yunxia</given-names></name><xref ref-type="aff" rid="aff1">a</xref></contrib><contrib contrib-type="author"><name><surname>Luthe</surname><given-names>Dawn S.</given-names></name><xref ref-type="aff" rid="aff2">b</xref></contrib><contrib contrib-type="author"><name><surname>Yuceer</surname><given-names>Cetin</given-names></name><xref ref-type="aff" rid="aff1">a</xref><xref ref-type="corresp" rid="cor1">1</xref></contrib></contrib-group><aff id="aff1"><label>a</label>Department of Forestry, Mississippi State University, Mississippi State, Mississippi 39762</aff><aff id="aff2"><label>b</label>Department of Biochemistry and Molecular Biology, Mississippi State University, Mississippi State, Mississippi 39762</aff><author-notes><fn id="cor1"><label>1</label><p>To whom correspondence should be addressed. E-mail <email>mcy1@ra.msstate.edu</email>; fax 662-325-8726.</p></fn></author-notes><pub-date pub-type="ppub"><month>8</month><year>2006</year></pub-date><volume>18</volume><issue>8</issue><fpage>1846</fpage><lpage>1861</lpage><history><date date-type="received"><day>11</day><month>1</month><year>2006</year></date><date date-type="rev-recd"><day>10</day><month>5</month><year>2006</year></date><date date-type="accepted"><day>19</day><month>6</month><year>2006</year></date></history><permissions><copyright-statement>Copyright © 2006, American Society of Plant Biologists</copyright-statement></permissions><abstract><p>Many woody perennials, such as poplar (<italic>Populus deltoides</italic>), are not able to form flower buds during the first several years of their life cycle. They must undergo a transition from the juvenile phase to the reproductive phase to be competent to produce flower buds. After this transition, trees begin to form flower buds in the spring of each growing season. The genetic factors that control flower initiation, ending the juvenile phase, are unknown in poplar. The factors that regulate seasonal flower bud formation are also unknown. Here, we report that poplar <italic>FLOWERING LOCUS T2</italic> (<italic>FT2</italic>), a relative of the <italic>Arabidopsis thaliana</italic> flowering-time gene <italic>FT</italic>, controls first-time and seasonal flowering in poplar. The <italic>FT2</italic> transcript is rare during the juvenile phase of poplar. When juvenile poplar is transformed with <italic>FT2</italic> and transcript levels are increased, flowering is induced within 1 year. During the transition between vegetative and reproductive growth in mature trees, <italic>FT2</italic> transcripts are abundant during reproductive growth under long days. Subsequently, floral meristems emerge on flanks of the axillary inflorescence shoots. These findings suggest that <italic>FT2</italic> is part of the flower initiation pathway in poplar and plays an additional role in regulating seasonal flower initiation that is integrated with the poplar perennial growth habit.</p></abstract></article-meta><notes><fn-group><fn><p>The author responsible for distribution of materials integral to the findings presented in this article in accordance with the policy described in the Instructions for Authors (<ext-link ext-link-type="uri" xlink:href="www.plantcell.org">www.plantcell.org</ext-link>) is: Cetin Yuceer (<email>mcy1@ra.msstate.edu</email>).</p></fn><fn id="fn1"><label>[W]</label><p>Online version contains Web-only data.</p></fn><fn><p>Article, publication date, and citation information can be found at <ext-link ext-link-type="uri" xlink:href="www.plantcell.org/cgi/doi/10.1105/tpc.106.041038">www.plantcell.org/cgi/doi/10.1105/tpc.106.041038</ext-link>.</p></fn></fn-group></notes></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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