Anatomy and development of the endodermis and phellem of Quercus suber L. roots.
Identifieur interne : 001302 ( Main/Corpus ); précédent : 001301; suivant : 001303Anatomy and development of the endodermis and phellem of Quercus suber L. roots.
Auteurs : Adelaide Machado ; Helena Pereira ; Rita Teresa TeixeiraSource :
- Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada [ 1435-8115 ] ; 2013.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Lipids.
- anatomy & histology : Plant Roots.
- chemistry : Quercus.
- growth & development : Plant Roots, Quercus.
- ultrastructure : Quercus.
- Histocytochemistry, Microscopy, Electron, Phytophthora, Staining and Labeling.
Abstract
Quercus suber L. has been investigated with special attention to the stem bark and its cork formation layer, but excluding the roots. Roots are the location of infection by pathogens such as Phytophthora cinnamomi responsible for the tree's sudden death. It is widely accepted that suberin establishes boundaries within tissues, serves as a barrier against free water and ion passage, and works as a shield against pathogen attacks. We followed the suberization of young secondary roots of cork oak. The first suberin deposition detectable by transmission electron microscopy (TEM) and neutral red (NR) was in the endoderm Casparian strips. Casparian strips are not detected by Sudan red 7B and Fluorol yellow (FY) that specifically stain lamellae suberin. Reaction to Sudan was verified in the endodermis and later on in phellem cells that resulted from the phellogen. Under TEM, the Sudan and FY-stained cells showed clear suberin lamellae while the newer formed phellem cells displayed a distinct NR signal compared to the outermost phellem cells. We concluded that suberin chemical components are arranged differently in the cell wall according to the physiological role or maturation stage of a given tissue.
DOI: 10.1017/S1431927613000287
PubMed: 23551860
Links to Exploration step
pubmed:23551860Le document en format XML
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<author><name sortKey="Machado, Adelaide" sort="Machado, Adelaide" uniqKey="Machado A" first="Adelaide" last="Machado">Adelaide Machado</name>
<affiliation><nlm:affiliation>Centro de Estudos Florestais, Instituto superior de Agronomia, Universidade Técnica de Lisboa, 1349-017, Portugal.</nlm:affiliation>
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<author><name sortKey="Pereira, Helena" sort="Pereira, Helena" uniqKey="Pereira H" first="Helena" last="Pereira">Helena Pereira</name>
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<author><name sortKey="Teixeira, Rita Teresa" sort="Teixeira, Rita Teresa" uniqKey="Teixeira R" first="Rita Teresa" last="Teixeira">Rita Teresa Teixeira</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Histocytochemistry (MeSH)</term>
<term>Lipids (analysis)</term>
<term>Microscopy, Electron (MeSH)</term>
<term>Phytophthora (MeSH)</term>
<term>Plant Roots (anatomy & histology)</term>
<term>Plant Roots (growth & development)</term>
<term>Quercus (chemistry)</term>
<term>Quercus (growth & development)</term>
<term>Quercus (ultrastructure)</term>
<term>Staining and Labeling (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Lipids</term>
</keywords>
<keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Plant Roots</term>
</keywords>
<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Quercus</term>
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<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Roots</term>
<term>Quercus</term>
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<keywords scheme="MESH" xml:lang="en"><term>Histocytochemistry</term>
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<front><div type="abstract" xml:lang="en">Quercus suber L. has been investigated with special attention to the stem bark and its cork formation layer, but excluding the roots. Roots are the location of infection by pathogens such as Phytophthora cinnamomi responsible for the tree's sudden death. It is widely accepted that suberin establishes boundaries within tissues, serves as a barrier against free water and ion passage, and works as a shield against pathogen attacks. We followed the suberization of young secondary roots of cork oak. The first suberin deposition detectable by transmission electron microscopy (TEM) and neutral red (NR) was in the endoderm Casparian strips. Casparian strips are not detected by Sudan red 7B and Fluorol yellow (FY) that specifically stain lamellae suberin. Reaction to Sudan was verified in the endodermis and later on in phellem cells that resulted from the phellogen. Under TEM, the Sudan and FY-stained cells showed clear suberin lamellae while the newer formed phellem cells displayed a distinct NR signal compared to the outermost phellem cells. We concluded that suberin chemical components are arranged differently in the cell wall according to the physiological role or maturation stage of a given tissue.</div>
</front>
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<Abstract><AbstractText>Quercus suber L. has been investigated with special attention to the stem bark and its cork formation layer, but excluding the roots. Roots are the location of infection by pathogens such as Phytophthora cinnamomi responsible for the tree's sudden death. It is widely accepted that suberin establishes boundaries within tissues, serves as a barrier against free water and ion passage, and works as a shield against pathogen attacks. We followed the suberization of young secondary roots of cork oak. The first suberin deposition detectable by transmission electron microscopy (TEM) and neutral red (NR) was in the endoderm Casparian strips. Casparian strips are not detected by Sudan red 7B and Fluorol yellow (FY) that specifically stain lamellae suberin. Reaction to Sudan was verified in the endodermis and later on in phellem cells that resulted from the phellogen. Under TEM, the Sudan and FY-stained cells showed clear suberin lamellae while the newer formed phellem cells displayed a distinct NR signal compared to the outermost phellem cells. We concluded that suberin chemical components are arranged differently in the cell wall according to the physiological role or maturation stage of a given tissue.</AbstractText>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Machado</LastName>
<ForeName>Adelaide</ForeName>
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<AffiliationInfo><Affiliation>Centro de Estudos Florestais, Instituto superior de Agronomia, Universidade Técnica de Lisboa, 1349-017, Portugal.</Affiliation>
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<Author ValidYN="Y"><LastName>Teixeira</LastName>
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<MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName>
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<MeshHeading><DescriptorName UI="D013194" MajorTopicYN="N">Staining and Labeling</DescriptorName>
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