Atypical lignification in eastern leatherwood (Dirca palustris).
Identifieur interne : 000550 ( Main/Exploration ); précédent : 000549; suivant : 000551Atypical lignification in eastern leatherwood (Dirca palustris).
Auteurs : Yaseen Mottiar [Canada] ; Notburga Gierlinger [Autriche] ; Dragica Jeremic [États-Unis] ; Emma R. Master [Canada] ; Shawn D. Mansfield [Canada]Source :
- The New phytologist [ 1469-8137 ] ; 2020.
Abstract
Lignin is a complex phenolic biopolymer found mainly in the secondary cell walls of vascular plants, where it contributes to mechanical strength, water conduction, and plant defence. We studied the lignin of eastern leatherwood (Dirca palustris) because this slow-growing woody shrub is known for its flexible stems. Various analytical techniques and microscopy methods were employed to examine the composition and distribution of lignin and structural polysaccharides in leatherwood xylem in comparison with trembling aspen (Populus tremuloides) and white spruce (Picea glauca). We found that leatherwood has low overall levels of lignin, a high syringyl lignin content, and a unique distribution of lignin. Most remarkably, the cell corners and middle lamellae remain unlignified in mature xylem. These findings help explain the flexibility of leatherwood and also call into question the classical model of lignification, which purports that lignin polymerization begins in the cell corners and middle lamellae. This atypical lignification regime vividly illustrates the diversity in plant secondary cell wall formation that abounds in nature and casts leatherwood as a new model for the study of lignin biogenesis.
DOI: 10.1111/nph.16394
PubMed: 31883117
PubMed Central: PMC7187453
Affiliations:
- Autriche, Canada, États-Unis
- Colombie-Britannique , Ontario, Vienne (Autriche)
- Toronto, Vancouver, Vienne (Autriche)
- Université de Toronto, Université de la Colombie-Britannique
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Master</name><affiliation wicri:level="4"><nlm:affiliation>Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5</wicri:regionArea><orgName type="university">Université de Toronto</orgName><placeName><settlement type="city">Toronto</settlement><region type="state">Ontario</region></placeName></affiliation></author><author><name sortKey="Mansfield, Shawn D" sort="Mansfield, Shawn D" uniqKey="Mansfield S" first="Shawn D" last="Mansfield">Shawn D. Mansfield</name><affiliation wicri:level="4"><nlm:affiliation>Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4</wicri:regionArea><orgName type="university">Université de la Colombie-Britannique</orgName><placeName><settlement type="city">Vancouver</settlement><region type="state">Colombie-Britannique </region></placeName></affiliation></author></analytic><series><title level="j">The New phytologist</title><idno type="eISSN">1469-8137</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Lignin is a complex phenolic biopolymer found mainly in the secondary cell walls of vascular plants, where it contributes to mechanical strength, water conduction, and plant defence. We studied the lignin of eastern leatherwood (Dirca palustris) because this slow-growing woody shrub is known for its flexible stems. Various analytical techniques and microscopy methods were employed to examine the composition and distribution of lignin and structural polysaccharides in leatherwood xylem in comparison with trembling aspen (Populus tremuloides) and white spruce (Picea glauca). We found that leatherwood has low overall levels of lignin, a high syringyl lignin content, and a unique distribution of lignin. Most remarkably, the cell corners and middle lamellae remain unlignified in mature xylem. These findings help explain the flexibility of leatherwood and also call into question the classical model of lignification, which purports that lignin polymerization begins in the cell corners and middle lamellae. This atypical lignification regime vividly illustrates the diversity in plant secondary cell wall formation that abounds in nature and casts leatherwood as a new model for the study of lignin biogenesis.</div></front></TEI><pubmed><MedlineCitation Status="In-Process" Owner="NLM"><PMID Version="1">31883117</PMID><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1469-8137</ISSN><JournalIssue CitedMedium="Internet"><Volume>226</Volume><Issue>3</Issue><PubDate><Year>2020</Year><Month>05</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Atypical lignification in eastern leatherwood (Dirca palustris).</ArticleTitle><Pagination><MedlinePgn>704-713</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.16394</ELocationID><Abstract><AbstractText>Lignin is a complex phenolic biopolymer found mainly in the secondary cell walls of vascular plants, where it contributes to mechanical strength, water conduction, and plant defence. We studied the lignin of eastern leatherwood (Dirca palustris) because this slow-growing woody shrub is known for its flexible stems. Various analytical techniques and microscopy methods were employed to examine the composition and distribution of lignin and structural polysaccharides in leatherwood xylem in comparison with trembling aspen (Populus tremuloides) and white spruce (Picea glauca). We found that leatherwood has low overall levels of lignin, a high syringyl lignin content, and a unique distribution of lignin. Most remarkably, the cell corners and middle lamellae remain unlignified in mature xylem. These findings help explain the flexibility of leatherwood and also call into question the classical model of lignification, which purports that lignin polymerization begins in the cell corners and middle lamellae. This atypical lignification regime vividly illustrates the diversity in plant secondary cell wall formation that abounds in nature and casts leatherwood as a new model for the study of lignin biogenesis.</AbstractText><CopyrightInformation>© 2019 The Authors New Phytologist © 2019 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Mottiar</LastName><ForeName>Yaseen</ForeName><Initials>Y</Initials><Identifier Source="ORCID">0000-0002-4106-6159</Identifier><AffiliationInfo><Affiliation>Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Gierlinger</LastName><ForeName>Notburga</ForeName><Initials>N</Initials><Identifier Source="ORCID">0000-0002-3699-9931</Identifier><AffiliationInfo><Affiliation>Department of Nanobiotechnology, Institute for Biophysics, University of Natural Resources and Life Sciences Vienna, Muthgasse 11, Vienna, 1190, Austria.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Jeremic</LastName><ForeName>Dragica</ForeName><Initials>D</Initials><Identifier Source="ORCID">0000-0001-9160-8756</Identifier><AffiliationInfo><Affiliation>Department of Sustainable Bioproducts, Mississippi State University, Box 9680, Starkville, MS, 39759, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Master</LastName><ForeName>Emma R</ForeName><Initials>ER</Initials><Identifier Source="ORCID">0000-0002-6837-9817</Identifier><AffiliationInfo><Affiliation>Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON, M5S 3E5, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Mansfield</LastName><ForeName>Shawn D</ForeName><Initials>SD</Initials><Identifier Source="ORCID">0000-0002-0175-554X</Identifier><AffiliationInfo><Affiliation>Department of Wood Science, 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IdType="pubmed">29481639</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed><affiliations><list><country><li>Autriche</li><li>Canada</li><li>États-Unis</li></country><region><li>Colombie-Britannique </li><li>Ontario</li><li>Vienne (Autriche)</li></region><settlement><li>Toronto</li><li>Vancouver</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université de Toronto</li><li>Université de la Colombie-Britannique</li></orgName></list><tree><country name="Canada"><region name="Colombie-Britannique "><name sortKey="Mottiar, Yaseen" sort="Mottiar, Yaseen" uniqKey="Mottiar Y" first="Yaseen" last="Mottiar">Yaseen Mottiar</name></region><name sortKey="Mansfield, Shawn D" sort="Mansfield, Shawn D" uniqKey="Mansfield S" first="Shawn D" last="Mansfield">Shawn D. 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