STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)
Identifieur interne : 001C16 ( Istex/Corpus ); précédent : 001C15; suivant : 001C17STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)
Auteurs : Bok Yeon Jo ; Woongghi Shin ; Sung Min Boo ; Han Soon Kim ; Peter A. SiverSource :
- Journal of Phycology [ 0022-3646 ] ; 2011-04.
English descriptors
- KwdEn :
Abstract
The genus Mallomonas, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance of the different siliceous features of the scales, such as the dome, V rib, and secondary structures, as well as the different types of scales, in understanding the evolution and phylogeny of the genus is little known. In this study, we investigated the scale and bristle ultrastructure, along with sequences of three genes, for 19 isolates (18 species) of Mallomonas (18 isolates were from Korean habitats). The isolates represented nine of the 19 sections. Sequences for both the nuclear SSU and LSU rDNA and plastid LSU of RUBISCO (rbcL) genes for each of the 19 Mallomonas isolates and four outgroups were determined. Bayesian and maximum‐likelihood (ML) analyses of the data revealed that Mallomonas consists of two strongly supported clades. Mallomonas bangladeshica (E. Takah. et T. Hayak.) Siver et A. P. Wolfe was at the base of the first clade that included taxa from the sections Planae and Heterospinae, both of which lack a V rib on the shield of the scales. Our results indicated that the sections Planae and Heterospinae should be combined. The second clade, with Mallomonas insignis Penard and Mallomonas punctifera Korshikov at the base, contained taxa from the sections Mallomonas, Striatae, Akrokomae, Annulatae, Torquatae, Punctiferae, and Insignes, all of which have V ribs or well‐developed marginal ribs on the scales. Sister relationships between Mallomonas and Striatae were strongly supported, but interrelations among the remaining sections were not resolved, probably due to inclusion of too few species. Our results suggest that the current classification of the genus Mallomonas at the section level will require some revision. Additional species will need to be added in future analyses.
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DOI: 10.1111/j.1529-8817.2010.00953.x
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)</title><author><name sortKey="Jo, Bok Yeon" sort="Jo, Bok Yeon" uniqKey="Jo B" first="Bok Yeon" last="Jo">Bok Yeon Jo</name><affiliation><mods:affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</mods:affiliation></affiliation></author><author><name sortKey="Shin, Woongghi" sort="Shin, Woongghi" uniqKey="Shin W" first="Woongghi" last="Shin">Woongghi Shin</name><affiliation><mods:affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</mods:affiliation></affiliation></author><author><name sortKey="Boo, Sung Min" sort="Boo, Sung Min" uniqKey="Boo S" first="Sung Min" last="Boo">Sung Min Boo</name><affiliation><mods:affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</mods:affiliation></affiliation></author><author><name sortKey="Kim, Han Soon" sort="Kim, Han Soon" uniqKey="Kim H" first="Han Soon" last="Kim">Han Soon Kim</name><affiliation><mods:affiliation>Department of Biology, Kyungpook National University, Daegu 702‐701, Korea</mods:affiliation></affiliation></author><author><name sortKey="Siver, Peter A" sort="Siver, Peter A" uniqKey="Siver P" first="Peter A." last="Siver">Peter A. Siver</name><affiliation><mods:affiliation>Department of Botany, Connecticut College, New London, Connecticut 06320, USA</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:D8A97BAC2581FE5E1D768655351EDB117422B6D5</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1111/j.1529-8817.2010.00953.x</idno><idno type="url">https://api.istex.fr/document/D8A97BAC2581FE5E1D768655351EDB117422B6D5/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001C16</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)</title><author><name sortKey="Jo, Bok Yeon" sort="Jo, Bok Yeon" uniqKey="Jo B" first="Bok Yeon" last="Jo">Bok Yeon Jo</name><affiliation><mods:affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</mods:affiliation></affiliation></author><author><name sortKey="Shin, Woongghi" sort="Shin, Woongghi" uniqKey="Shin W" first="Woongghi" last="Shin">Woongghi Shin</name><affiliation><mods:affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</mods:affiliation></affiliation></author><author><name sortKey="Boo, Sung Min" sort="Boo, Sung Min" uniqKey="Boo S" first="Sung Min" last="Boo">Sung Min Boo</name><affiliation><mods:affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</mods:affiliation></affiliation></author><author><name sortKey="Kim, Han Soon" sort="Kim, Han Soon" uniqKey="Kim H" first="Han Soon" last="Kim">Han Soon Kim</name><affiliation><mods:affiliation>Department of Biology, Kyungpook National University, Daegu 702‐701, Korea</mods:affiliation></affiliation></author><author><name sortKey="Siver, Peter A" sort="Siver, Peter A" uniqKey="Siver P" first="Peter A." last="Siver">Peter A. Siver</name><affiliation><mods:affiliation>Department of Botany, Connecticut College, New London, Connecticut 06320, USA</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Phycology</title><idno type="ISSN">0022-3646</idno><idno type="eISSN">1529-8817</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-04">2011-04</date><biblScope unit="volume">47</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="415">415</biblScope><biblScope unit="page" to="425">425</biblScope></imprint><idno type="ISSN">0022-3646</idno></series><idno type="istex">D8A97BAC2581FE5E1D768655351EDB117422B6D5</idno><idno type="DOI">10.1111/j.1529-8817.2010.00953.x</idno><idno type="ArticleID">JPY953</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-3646</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Mallomonas</term><term>Synurophyceae</term><term>phylogeny</term><term>rbcL</term><term>ribosomal DNA</term><term>ultrastructure</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The genus Mallomonas, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance of the different siliceous features of the scales, such as the dome, V rib, and secondary structures, as well as the different types of scales, in understanding the evolution and phylogeny of the genus is little known. In this study, we investigated the scale and bristle ultrastructure, along with sequences of three genes, for 19 isolates (18 species) of Mallomonas (18 isolates were from Korean habitats). The isolates represented nine of the 19 sections. Sequences for both the nuclear SSU and LSU rDNA and plastid LSU of RUBISCO (rbcL) genes for each of the 19 Mallomonas isolates and four outgroups were determined. Bayesian and maximum‐likelihood (ML) analyses of the data revealed that Mallomonas consists of two strongly supported clades. Mallomonas bangladeshica (E. Takah. et T. Hayak.) Siver et A. P. Wolfe was at the base of the first clade that included taxa from the sections Planae and Heterospinae, both of which lack a V rib on the shield of the scales. Our results indicated that the sections Planae and Heterospinae should be combined. The second clade, with Mallomonas insignis Penard and Mallomonas punctifera Korshikov at the base, contained taxa from the sections Mallomonas, Striatae, Akrokomae, Annulatae, Torquatae, Punctiferae, and Insignes, all of which have V ribs or well‐developed marginal ribs on the scales. Sister relationships between Mallomonas and Striatae were strongly supported, but interrelations among the remaining sections were not resolved, probably due to inclusion of too few species. Our results suggest that the current classification of the genus Mallomonas at the section level will require some revision. Additional species will need to be added in future analyses.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Bok Yeon Jo</name><affiliations><json:string>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</json:string></affiliations></json:item><json:item><name>Woongghi Shin</name><affiliations><json:string>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</json:string></affiliations></json:item><json:item><name>Sung Min Boo</name><affiliations><json:string>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</json:string></affiliations></json:item><json:item><name>Han Soon Kim</name><affiliations><json:string>Department of Biology, Kyungpook National University, Daegu 702‐701, Korea</json:string></affiliations></json:item><json:item><name>Peter A. Siver</name><affiliations><json:string>Department of Botany, Connecticut College, New London, Connecticut 06320, USA</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Mallomonas</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>phylogeny</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>rbcL</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>ribosomal DNA</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Synurophyceae</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>ultrastructure</value></json:item></subject><articleId><json:string>JPY953</json:string></articleId><language><json:string>eng</json:string></language><abstract>The genus Mallomonas, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance of the different siliceous features of the scales, such as the dome, V rib, and secondary structures, as well as the different types of scales, in understanding the evolution and phylogeny of the genus is little known. In this study, we investigated the scale and bristle ultrastructure, along with sequences of three genes, for 19 isolates (18 species) of Mallomonas (18 isolates were from Korean habitats). The isolates represented nine of the 19 sections. Sequences for both the nuclear SSU and LSU rDNA and plastid LSU of RUBISCO (rbcL) genes for each of the 19 Mallomonas isolates and four outgroups were determined. Bayesian and maximum‐likelihood (ML) analyses of the data revealed that Mallomonas consists of two strongly supported clades. Mallomonas bangladeshica (E. Takah. et T. Hayak.) Siver et A. P. Wolfe was at the base of the first clade that included taxa from the sections Planae and Heterospinae, both of which lack a V rib on the shield of the scales. Our results indicated that the sections Planae and Heterospinae should be combined. The second clade, with Mallomonas insignis Penard and Mallomonas punctifera Korshikov at the base, contained taxa from the sections Mallomonas, Striatae, Akrokomae, Annulatae, Torquatae, Punctiferae, and Insignes, all of which have V ribs or well‐developed marginal ribs on the scales. Sister relationships between Mallomonas and Striatae were strongly supported, but interrelations among the remaining sections were not resolved, probably due to inclusion of too few species. Our results suggest that the current classification of the genus Mallomonas at the section level will require some revision. Additional species will need to be added in future analyses.</abstract><qualityIndicators><score>8</score><pdfVersion>1.3</pdfVersion><pdfPageSize>595.276 x 782.362 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>6</keywordCount><abstractCharCount>2118</abstractCharCount><pdfWordCount>6741</pdfWordCount><pdfCharCount>40854</pdfCharCount><pdfPageCount>11</pdfPageCount><abstractWordCount>326</abstractWordCount></qualityIndicators><title>STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)</title><genre><json:string>article</json:string></genre><host><volume>47</volume><publisherId><json:string>JPY</json:string></publisherId><pages><total>11</total><last>425</last><first>415</first></pages><issn><json:string>0022-3646</json:string></issn><issue>2</issue><genre><json:string>Journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1529-8817</json:string></eissn><title>Journal of Phycology</title><doi><json:string>10.1111/(ISSN)1529-8817</json:string></doi></host><publicationDate>2011</publicationDate><copyrightDate>2011</copyrightDate><doi><json:string>10.1111/j.1529-8817.2010.00953.x</json:string></doi><id>D8A97BAC2581FE5E1D768655351EDB117422B6D5</id><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/D8A97BAC2581FE5E1D768655351EDB117422B6D5/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/D8A97BAC2581FE5E1D768655351EDB117422B6D5/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/D8A97BAC2581FE5E1D768655351EDB117422B6D5/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><availability><p>WILEY</p></availability><date>2011</date></publicationStmt><notesStmt><note type="content">*Received 25 March 2010. Accepted 22 October 2010.</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)</title><author><persName><forename type="first">Bok Yeon</forename><surname>Jo</surname></persName><affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</affiliation></author><author><persName><forename type="first">Woongghi</forename><surname>Shin</surname></persName><affiliation>Author for correspondence: e‐mail shinw@cnu.ac.kr.</affiliation><affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</affiliation></author><author><persName><forename type="first">Sung Min</forename><surname>Boo</surname></persName><affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</affiliation></author><author><persName><forename type="first">Han Soon</forename><surname>Kim</surname></persName><affiliation>Department of Biology, Kyungpook National University, Daegu 702‐701, Korea</affiliation></author><author><persName><forename type="first">Peter A.</forename><surname>Siver</surname></persName><affiliation>Department of Botany, Connecticut College, New London, Connecticut 06320, USA</affiliation></author></analytic><monogr><title level="j">Journal of Phycology</title><idno type="pISSN">0022-3646</idno><idno type="eISSN">1529-8817</idno><idno type="DOI">10.1111/(ISSN)1529-8817</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-04"></date><biblScope unit="volume">47</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="415">415</biblScope><biblScope unit="page" to="425">425</biblScope></imprint></monogr><idno type="istex">D8A97BAC2581FE5E1D768655351EDB117422B6D5</idno><idno type="DOI">10.1111/j.1529-8817.2010.00953.x</idno><idno type="ArticleID">JPY953</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2011</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The genus Mallomonas, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance of the different siliceous features of the scales, such as the dome, V rib, and secondary structures, as well as the different types of scales, in understanding the evolution and phylogeny of the genus is little known. In this study, we investigated the scale and bristle ultrastructure, along with sequences of three genes, for 19 isolates (18 species) of Mallomonas (18 isolates were from Korean habitats). The isolates represented nine of the 19 sections. Sequences for both the nuclear SSU and LSU rDNA and plastid LSU of RUBISCO (rbcL) genes for each of the 19 Mallomonas isolates and four outgroups were determined. Bayesian and maximum‐likelihood (ML) analyses of the data revealed that Mallomonas consists of two strongly supported clades. Mallomonas bangladeshica (E. Takah. et T. Hayak.) Siver et A. P. Wolfe was at the base of the first clade that included taxa from the sections Planae and Heterospinae, both of which lack a V rib on the shield of the scales. Our results indicated that the sections Planae and Heterospinae should be combined. The second clade, with Mallomonas insignis Penard and Mallomonas punctifera Korshikov at the base, contained taxa from the sections Mallomonas, Striatae, Akrokomae, Annulatae, Torquatae, Punctiferae, and Insignes, all of which have V ribs or well‐developed marginal ribs on the scales. Sister relationships between Mallomonas and Striatae were strongly supported, but interrelations among the remaining sections were not resolved, probably due to inclusion of too few species. Our results suggest that the current classification of the genus Mallomonas at the section level will require some revision. Additional species will need to be added in future analyses.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Mallomonas</term></item><item><term>phylogeny</term></item><item><term>rbcL</term></item><item><term>ribosomal DNA</term></item><item><term>Synurophyceae</term></item><item><term>ultrastructure</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2011-04">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/D8A97BAC2581FE5E1D768655351EDB117422B6D5/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta 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value="JPY953"></id></idGroup><countGroup><count type="pageTotal" number="11"></count></countGroup><titleGroup><title type="tocHeading1">Phylogenetics and Taxonomy</title></titleGroup><copyright>© 2011 Phycological Society of America</copyright><eventGroup><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.4.8 mode:FullText" date="2011-04-04"></event><event type="publishedOnlineEarlyUnpaginated" date="2011-03-01"></event><event type="firstOnline" date="2011-03-01"></event><event type="publishedOnlineFinalForm" date="2011-04-04"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-01"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="415">415</numbering><numbering type="pageLast" number="425">425</numbering></numberingGroup><linkGroup><link type="toTypesetVersion" href="file:JPY.JPY953.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="4"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS <i>MALLOMONAS</i> (SYNUROPHYCEAE)<link href="#fn1"><sup>1</sup></link></title><title type="tocForm">STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS <i>MALLOMONAS</i> (SYNUROPHYCEAE)</title><title type="shortAuthors">BOK YEON JO ET AL.</title><title type="short">PHYLOGENY OF THE GENUS <i>MALLOMONAS</i></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>Bok Yeon</givenNames><familyName>Jo</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1" noteRef="#fn2"><personName><givenNames>Woongghi</givenNames><familyName>Shin</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a1"><personName><givenNames>Sung Min</givenNames><familyName>Boo</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a2"><personName><givenNames>Han Soon</givenNames><familyName>Kim</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a3"><personName><givenNames>Peter A.</givenNames><familyName>Siver</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1"><unparsedAffiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</unparsedAffiliation></affiliation><affiliation xml:id="a2"><unparsedAffiliation>Department of Biology, Kyungpook National University, Daegu 702‐701, Korea</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="US"><unparsedAffiliation>Department of Botany, Connecticut College, New London, Connecticut 06320, USA</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1"><i>Mallomonas</i></keyword><keyword xml:id="k2">phylogeny</keyword><keyword xml:id="k3"><i>rbc</i>L</keyword><keyword xml:id="k4">ribosomal DNA</keyword><keyword xml:id="k5">Synurophyceae</keyword><keyword xml:id="k6">ultrastructure</keyword></keywordGroup><supportingInformation><p><b>Table S1.</b> List of examined strains and accession numbers.</p><supportingInfoItem><mediaResource alt="supporting info item" href="urn-x:wiley:00223646:media:jpy953:JPY_953_sm_tables1"></mediaResource><caption>Supporting info item</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main" xml:lang="en"><p>The genus <i>Mallomonas</i>, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance of the different siliceous features of the scales, such as the dome, V rib, and secondary structures, as well as the different types of scales, in understanding the evolution and phylogeny of the genus is little known. In this study, we investigated the scale and bristle ultrastructure, along with sequences of three genes, for 19 isolates (18 species) of <i>Mallomonas</i> (18 isolates were from Korean habitats). The isolates represented nine of the 19 sections. Sequences for both the nuclear SSU and LSU rDNA and plastid LSU of RUBISCO (<i>rbc</i>L) genes for each of the 19 <i>Mallomonas</i> isolates and four outgroups were determined. Bayesian and maximum‐likelihood (ML) analyses of the data revealed that <i>Mallomonas</i> consists of two strongly supported clades. <i>Mallomonas bangladeshica</i> (E. Takah. et T. Hayak.) Siver et A. P. Wolfe was at the base of the first clade that included taxa from the sections <i>Planae</i> and <i>Heterospinae</i>, both of which lack a V rib on the shield of the scales. Our results indicated that the sections <i>Planae</i> and <i>Heterospinae</i> should be combined. The second clade, with <i>Mallomonas insignis</i> Penard and <i>Mallomonas punctifera</i> Korshikov at the base, contained taxa from the sections <i>Mallomonas, Striatae, Akrokomae, Annulatae, Torquatae, Punctiferae</i>, and <i>Insignes</i>, all of which have V ribs or well‐developed marginal ribs on the scales. Sister relationships between <i>Mallomonas</i> and <i>Striatae</i> were strongly supported, but interrelations among the remaining sections were not resolved, probably due to inclusion of too few species. Our results suggest that the current classification of the genus <i>Mallomonas</i> at the section level will require some revision. Additional species will need to be added in future analyses.</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="fn1"><p> Received 25 March 2010. Accepted 22 October 2010.</p></note><note xml:id="fn2"><p> Author for correspondence: e‐mail <email>shinw@cnu.ac.kr</email>.</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS MALLOMONAS (SYNUROPHYCEAE)</title></titleInfo><titleInfo type="abbreviated"><title>PHYLOGENY OF THE GENUS MALLOMONAS</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>STUDIES ON ULTRASTRUCTURE AND THREE‐GENE PHYLOGENY OF THE GENUS</title></titleInfo><name type="personal"><namePart type="given">Bok Yeon</namePart><namePart type="family">Jo</namePart><affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Woongghi</namePart><namePart type="family">Shin</namePart><affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</affiliation><description>Author for correspondence: e‐mail shinw@cnu.ac.kr.</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Sung Min</namePart><namePart type="family">Boo</namePart><affiliation>Department of Biology, Chungnam National University, Daejeon 305‐764, Korea</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Han Soon</namePart><namePart type="family">Kim</namePart><affiliation>Department of Biology, Kyungpook National University, Daegu 702‐701, Korea</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Peter A.</namePart><namePart type="family">Siver</namePart><affiliation>Department of Botany, Connecticut College, New London, Connecticut 06320, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2011-04</dateIssued><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">4</extent><extent unit="tables">2</extent></physicalDescription><abstract lang="en">The genus Mallomonas, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance of the different siliceous features of the scales, such as the dome, V rib, and secondary structures, as well as the different types of scales, in understanding the evolution and phylogeny of the genus is little known. In this study, we investigated the scale and bristle ultrastructure, along with sequences of three genes, for 19 isolates (18 species) of Mallomonas (18 isolates were from Korean habitats). The isolates represented nine of the 19 sections. Sequences for both the nuclear SSU and LSU rDNA and plastid LSU of RUBISCO (rbcL) genes for each of the 19 Mallomonas isolates and four outgroups were determined. Bayesian and maximum‐likelihood (ML) analyses of the data revealed that Mallomonas consists of two strongly supported clades. Mallomonas bangladeshica (E. Takah. et T. Hayak.) Siver et A. P. Wolfe was at the base of the first clade that included taxa from the sections Planae and Heterospinae, both of which lack a V rib on the shield of the scales. Our results indicated that the sections Planae and Heterospinae should be combined. The second clade, with Mallomonas insignis Penard and Mallomonas punctifera Korshikov at the base, contained taxa from the sections Mallomonas, Striatae, Akrokomae, Annulatae, Torquatae, Punctiferae, and Insignes, all of which have V ribs or well‐developed marginal ribs on the scales. Sister relationships between Mallomonas and Striatae were strongly supported, but interrelations among the remaining sections were not resolved, probably due to inclusion of too few species. Our results suggest that the current classification of the genus Mallomonas at the section level will require some revision. Additional species will need to be added in future analyses.</abstract><note type="content">*Received 25 March 2010. Accepted 22 October 2010.</note><subject lang="en"><genre>Keywords</genre><topic>Mallomonas</topic><topic>phylogeny</topic><topic>rbcL</topic><topic>ribosomal DNA</topic><topic>Synurophyceae</topic><topic>ultrastructure</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Phycology</title></titleInfo><genre type="Journal">journal</genre><note type="content"> Table S1. List of examined strains and accession numbers.Supporting Info Item: Supporting info item - </note><identifier type="ISSN">0022-3646</identifier><identifier type="eISSN">1529-8817</identifier><identifier type="DOI">10.1111/(ISSN)1529-8817</identifier><identifier type="PublisherID">JPY</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>47</number></detail><detail type="issue"><caption>no.</caption><number>2</number></detail><extent unit="pages"><start>415</start><end>425</end><total>11</total></extent></part></relatedItem><identifier type="istex">D8A97BAC2581FE5E1D768655351EDB117422B6D5</identifier><identifier type="DOI">10.1111/j.1529-8817.2010.00953.x</identifier><identifier type="ArticleID">JPY953</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 Phycological Society of America</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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