Phloem networks in leaves.
Identifieur interne : 001014 ( Main/Corpus ); précédent : 001013; suivant : 001015Phloem networks in leaves.
Auteurs : M Nica R. Carvalho ; Juan M. Losada ; Karl J. NiklasSource :
- Current opinion in plant biology [ 1879-0356 ] ; 2018.
English descriptors
- KwdEn :
- Biological Transport (MeSH), Ginkgo biloba (anatomy & histology), Ginkgo biloba (metabolism), Phloem (anatomy & histology), Phloem (metabolism), Photosynthesis (MeSH), Plant Leaves (anatomy & histology), Plant Leaves (metabolism), Plant Stems (anatomy & histology), Plant Stems (metabolism), Plants (anatomy & histology), Plants (metabolism), Populus (anatomy & histology), Populus (metabolism), Xylem (anatomy & histology), Xylem (metabolism).
- MESH :
- anatomy & histology : Ginkgo biloba, Phloem, Plant Leaves, Plant Stems, Plants, Populus, Xylem.
- metabolism : Ginkgo biloba, Phloem, Plant Leaves, Plant Stems, Plants, Populus, Xylem.
- Biological Transport, Photosynthesis.
Abstract
The survival of all vascular plants depends on phloem and xylem, which comprise a hydraulically coupled tissue system that transports photosynthates, water, and a variety of other molecules and ions. Although xylem hydraulics has been extensively studied, until recently, comparatively little is known quantitatively about the phloem hydraulic network and how it is functionally coupled to the xylem network, particularly in photosynthetic leaves. Here, we summarize recent advances in quantifying phloem hydraulics in fully expanded mature leaves with different vascular architectures and show that (1) the size of phloem conducting cells across phylogenetically different taxa scales isometrically with respect to xylem conducting cell size, (2) cell transport areas and lengths increase along phloem transport pathways in a manner that can be used to model Münch's pressure-flow hypothesis, and (3) report observations that invalidate da Vinci's and Murray's hydraulic models as plausible constructs for understanding photosynthate transport in the leaf lamina.
DOI: 10.1016/j.pbi.2017.12.007
PubMed: 29306742
Links to Exploration step
pubmed:29306742Le document en format XML
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<author><name sortKey="Carvalho, M Nica R" sort="Carvalho, M Nica R" uniqKey="Carvalho M" first="M Nica R" last="Carvalho">M Nica R. Carvalho</name>
<affiliation><nlm:affiliation>Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA; Smithsonian Tropical Research Institute, Box 0843-03092, Balboa, Ancón, Panama.</nlm:affiliation>
</affiliation>
</author>
<author><name sortKey="Losada, Juan M" sort="Losada, Juan M" uniqKey="Losada J" first="Juan M" last="Losada">Juan M. Losada</name>
<affiliation><nlm:affiliation>Arnold Arboretum, Harvard University, 1300 Centre St., Boston, MA 02131, USA.</nlm:affiliation>
</affiliation>
</author>
<author><name sortKey="Niklas, Karl J" sort="Niklas, Karl J" uniqKey="Niklas K" first="Karl J" last="Niklas">Karl J. Niklas</name>
<affiliation><nlm:affiliation>Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA. Electronic address: kjn2@cornell.edu.</nlm:affiliation>
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<author><name sortKey="Carvalho, M Nica R" sort="Carvalho, M Nica R" uniqKey="Carvalho M" first="M Nica R" last="Carvalho">M Nica R. Carvalho</name>
<affiliation><nlm:affiliation>Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA; Smithsonian Tropical Research Institute, Box 0843-03092, Balboa, Ancón, Panama.</nlm:affiliation>
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<author><name sortKey="Losada, Juan M" sort="Losada, Juan M" uniqKey="Losada J" first="Juan M" last="Losada">Juan M. Losada</name>
<affiliation><nlm:affiliation>Arnold Arboretum, Harvard University, 1300 Centre St., Boston, MA 02131, USA.</nlm:affiliation>
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<author><name sortKey="Niklas, Karl J" sort="Niklas, Karl J" uniqKey="Niklas K" first="Karl J" last="Niklas">Karl J. Niklas</name>
<affiliation><nlm:affiliation>Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA. Electronic address: kjn2@cornell.edu.</nlm:affiliation>
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<series><title level="j">Current opinion in plant biology</title>
<idno type="eISSN">1879-0356</idno>
<imprint><date when="2018" type="published">2018</date>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biological Transport (MeSH)</term>
<term>Ginkgo biloba (anatomy & histology)</term>
<term>Ginkgo biloba (metabolism)</term>
<term>Phloem (anatomy & histology)</term>
<term>Phloem (metabolism)</term>
<term>Photosynthesis (MeSH)</term>
<term>Plant Leaves (anatomy & histology)</term>
<term>Plant Leaves (metabolism)</term>
<term>Plant Stems (anatomy & histology)</term>
<term>Plant Stems (metabolism)</term>
<term>Plants (anatomy & histology)</term>
<term>Plants (metabolism)</term>
<term>Populus (anatomy & histology)</term>
<term>Populus (metabolism)</term>
<term>Xylem (anatomy & histology)</term>
<term>Xylem (metabolism)</term>
</keywords>
<keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Ginkgo biloba</term>
<term>Phloem</term>
<term>Plant Leaves</term>
<term>Plant Stems</term>
<term>Plants</term>
<term>Populus</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Ginkgo biloba</term>
<term>Phloem</term>
<term>Plant Leaves</term>
<term>Plant Stems</term>
<term>Plants</term>
<term>Populus</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Biological Transport</term>
<term>Photosynthesis</term>
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<front><div type="abstract" xml:lang="en">The survival of all vascular plants depends on phloem and xylem, which comprise a hydraulically coupled tissue system that transports photosynthates, water, and a variety of other molecules and ions. Although xylem hydraulics has been extensively studied, until recently, comparatively little is known quantitatively about the phloem hydraulic network and how it is functionally coupled to the xylem network, particularly in photosynthetic leaves. Here, we summarize recent advances in quantifying phloem hydraulics in fully expanded mature leaves with different vascular architectures and show that (1) the size of phloem conducting cells across phylogenetically different taxa scales isometrically with respect to xylem conducting cell size, (2) cell transport areas and lengths increase along phloem transport pathways in a manner that can be used to model Münch's pressure-flow hypothesis, and (3) report observations that invalidate da Vinci's and Murray's hydraulic models as plausible constructs for understanding photosynthate transport in the leaf lamina.</div>
</front>
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<DateCompleted><Year>2018</Year>
<Month>11</Month>
<Day>19</Day>
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<JournalIssue CitedMedium="Internet"><Volume>43</Volume>
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<Month>06</Month>
</PubDate>
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<Title>Current opinion in plant biology</Title>
<ISOAbbreviation>Curr Opin Plant Biol</ISOAbbreviation>
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<ArticleTitle>Phloem networks in leaves.</ArticleTitle>
<Pagination><MedlinePgn>29-35</MedlinePgn>
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<Abstract><AbstractText>The survival of all vascular plants depends on phloem and xylem, which comprise a hydraulically coupled tissue system that transports photosynthates, water, and a variety of other molecules and ions. Although xylem hydraulics has been extensively studied, until recently, comparatively little is known quantitatively about the phloem hydraulic network and how it is functionally coupled to the xylem network, particularly in photosynthetic leaves. Here, we summarize recent advances in quantifying phloem hydraulics in fully expanded mature leaves with different vascular architectures and show that (1) the size of phloem conducting cells across phylogenetically different taxa scales isometrically with respect to xylem conducting cell size, (2) cell transport areas and lengths increase along phloem transport pathways in a manner that can be used to model Münch's pressure-flow hypothesis, and (3) report observations that invalidate da Vinci's and Murray's hydraulic models as plausible constructs for understanding photosynthate transport in the leaf lamina.</AbstractText>
<CopyrightInformation>Copyright © 2017 Elsevier Ltd. All rights reserved.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Carvalho</LastName>
<ForeName>Mónica R</ForeName>
<Initials>MR</Initials>
<AffiliationInfo><Affiliation>Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA; Smithsonian Tropical Research Institute, Box 0843-03092, Balboa, Ancón, Panama.</Affiliation>
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<Author ValidYN="Y"><LastName>Losada</LastName>
<ForeName>Juan M</ForeName>
<Initials>JM</Initials>
<AffiliationInfo><Affiliation>Arnold Arboretum, Harvard University, 1300 Centre St., Boston, MA 02131, USA.</Affiliation>
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<Author ValidYN="Y"><LastName>Niklas</LastName>
<ForeName>Karl J</ForeName>
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<AffiliationInfo><Affiliation>Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA. Electronic address: kjn2@cornell.edu.</Affiliation>
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<MeshHeadingList><MeshHeading><DescriptorName UI="D001692" MajorTopicYN="N">Biological Transport</DescriptorName>
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<MeshHeading><DescriptorName UI="D020441" MajorTopicYN="N">Ginkgo biloba</DescriptorName>
<QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
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<MeshHeading><DescriptorName UI="D052585" MajorTopicYN="N">Phloem</DescriptorName>
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<QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName>
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<MeshHeading><DescriptorName UI="D010788" MajorTopicYN="N">Photosynthesis</DescriptorName>
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<MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName>
<QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName>
<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
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<MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName>
<QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName>
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<MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName>
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