Avoiding transport bottlenecks in an expanding root system: xylem vessel development in fibrous and pioneer roots under field conditions.
Identifieur interne : 002B92 ( Main/Exploration ); précédent : 002B91; suivant : 002B93Avoiding transport bottlenecks in an expanding root system: xylem vessel development in fibrous and pioneer roots under field conditions.
Auteurs : Agnieszka Bagniewska-Zadworna [Pologne] ; Julia Byczyk ; David M. Eissenstat ; Jacek Oleksyn ; Marcin ZadwornySource :
- American journal of botany [ 1537-2197 ] ; 2012.
Descripteurs français
- KwdFr :
- Apoptose (MeSH), Microscopie de fluorescence (MeSH), Populus (croissance et développement), Populus (cytologie), Populus (métabolisme), Populus (ultrastructure), Racines de plante (croissance et développement), Racines de plante (cytologie), Racines de plante (métabolisme), Racines de plante (ultrastructure), Transport biologique (MeSH), Xylème (croissance et développement), Xylème (cytologie), Xylème (ultrastructure).
- MESH :
- croissance et développement : Populus, Racines de plante, Xylème.
- cytologie : Populus, Racines de plante, Xylème.
- métabolisme : Populus, Racines de plante.
- ultrastructure : Apoptose, Microscopie de fluorescence, Populus, Racines de plante, Transport biologique, Xylème.
English descriptors
- KwdEn :
- Apoptosis (MeSH), Biological Transport (MeSH), Microscopy, Fluorescence (MeSH), Plant Roots (cytology), Plant Roots (growth & development), Plant Roots (metabolism), Plant Roots (ultrastructure), Populus (cytology), Populus (growth & development), Populus (metabolism), Populus (ultrastructure), Xylem (cytology), Xylem (growth & development), Xylem (ultrastructure).
- MESH :
- cytology : Plant Roots, Populus, Xylem.
- growth & development : Plant Roots, Populus, Xylem.
- metabolism : Plant Roots, Populus.
- ultrastructure : Plant Roots, Populus, Xylem.
- Apoptosis, Biological Transport, Microscopy, Fluorescence.
Abstract
PREMISE OF THE STUDY
Root systems develop to effectively absorb water and nutrients and to rapidly transport these materials to the transpiring shoot. In woody plants, roots can be born with different functions: fibrous roots are primarily used for water and nutrient absorption, whereas pioneer roots have a greater role in transport. Because pioneer roots extend rapidly in the soil and typically quickly produce fibrous roots, they need to develop transport capacity rapidly so as to avoid becoming a bottleneck to the absorbed water of the developing fibrous roots and, as we hypothesized, immediately activate a specific type of autophagy at a precise time of their development.
METHODS
Using microscopy techniques, we monitored xylem development in Populus trichocarpa roots in the first 7 d after emergence under field conditions.
KEY RESULTS
Newly formed pioneer roots contained more primary xylem poles and had larger diameter tracheary elements than fibrous roots. While xylogenesis started later in pioneer roots than in fibrous, it was completed at the same time, resulting in functional vessels on the third to fourth day following root emergence. Programmed cell death was responsible for creating the water conducting capacity of xylem. Although the early xylogenesis processes were similar in fibrous and pioneer roots, secondary vascular development proceeded much more rapidly in pioneer roots.
CONCLUSIONS
Compared to fibrous roots, rapid development of transport capacity in pioneer roots is not primarily caused by accelerated xylogenesis but by larger and more numerous tracheary elements and by rapid initiation of secondary growth.
DOI: 10.3732/ajb.1100552
PubMed: 22917946
Affiliations:
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Eissenstat</name></author><author><name sortKey="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name></author><author><name sortKey="Zadworny, Marcin" sort="Zadworny, Marcin" uniqKey="Zadworny M" first="Marcin" last="Zadworny">Marcin Zadworny</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2012">2012</date><idno type="RBID">pubmed:22917946</idno><idno type="pmid">22917946</idno><idno type="doi">10.3732/ajb.1100552</idno><idno type="wicri:Area/Main/Corpus">002916</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002916</idno><idno type="wicri:Area/Main/Curation">002916</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">002916</idno><idno type="wicri:Area/Main/Exploration">002916</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Avoiding transport bottlenecks in an expanding root system: xylem vessel development in fibrous and pioneer roots under field conditions.</title><author><name sortKey="Bagniewska Zadworna, Agnieszka" sort="Bagniewska Zadworna, Agnieszka" uniqKey="Bagniewska Zadworna A" first="Agnieszka" last="Bagniewska-Zadworna">Agnieszka Bagniewska-Zadworna</name><affiliation wicri:level="1"><nlm:affiliation>Department of General Botany, Institute of Experimental Biology, Faculty of Biology, A. Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland. agabag@amu.edu.pl</nlm:affiliation><country xml:lang="fr">Pologne</country><wicri:regionArea>Department of General Botany, Institute of Experimental Biology, Faculty of Biology, A. Mickiewicz University, Umultowska 89, 61-614 Poznań</wicri:regionArea><wicri:noRegion>61-614 Poznań</wicri:noRegion></affiliation></author><author><name sortKey="Byczyk, Julia" sort="Byczyk, Julia" uniqKey="Byczyk J" first="Julia" last="Byczyk">Julia Byczyk</name></author><author><name sortKey="Eissenstat, David M" sort="Eissenstat, David M" uniqKey="Eissenstat D" first="David M" last="Eissenstat">David M. Eissenstat</name></author><author><name sortKey="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name></author><author><name sortKey="Zadworny, Marcin" sort="Zadworny, Marcin" uniqKey="Zadworny M" first="Marcin" last="Zadworny">Marcin Zadworny</name></author></analytic><series><title level="j">American journal of botany</title><idno type="eISSN">1537-2197</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Apoptosis (MeSH)</term><term>Biological Transport (MeSH)</term><term>Microscopy, Fluorescence (MeSH)</term><term>Plant Roots (cytology)</term><term>Plant Roots (growth & development)</term><term>Plant Roots (metabolism)</term><term>Plant Roots (ultrastructure)</term><term>Populus (cytology)</term><term>Populus (growth & development)</term><term>Populus (metabolism)</term><term>Populus (ultrastructure)</term><term>Xylem (cytology)</term><term>Xylem (growth & development)</term><term>Xylem (ultrastructure)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Apoptose (MeSH)</term><term>Microscopie de fluorescence (MeSH)</term><term>Populus (croissance et développement)</term><term>Populus (cytologie)</term><term>Populus (métabolisme)</term><term>Populus (ultrastructure)</term><term>Racines de plante (croissance et développement)</term><term>Racines de plante (cytologie)</term><term>Racines de plante (métabolisme)</term><term>Racines de plante (ultrastructure)</term><term>Transport biologique (MeSH)</term><term>Xylème (croissance et développement)</term><term>Xylème (cytologie)</term><term>Xylème (ultrastructure)</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Populus</term><term>Racines de plante</term><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="cytologie" xml:lang="fr"><term>Populus</term><term>Racines de plante</term><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Plant Roots</term><term>Populus</term><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Roots</term><term>Populus</term><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Roots</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Populus</term><term>Racines de plante</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="en"><term>Plant Roots</term><term>Populus</term><term>Xylem</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Apoptosis</term><term>Biological Transport</term><term>Microscopy, Fluorescence</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="fr"><term>Apoptose</term><term>Microscopie de fluorescence</term><term>Populus</term><term>Racines de plante</term><term>Transport biologique</term><term>Xylème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>PREMISE OF THE STUDY</b></p><p>Root systems develop to effectively absorb water and nutrients and to rapidly transport these materials to the transpiring shoot. In woody plants, roots can be born with different functions: fibrous roots are primarily used for water and nutrient absorption, whereas pioneer roots have a greater role in transport. Because pioneer roots extend rapidly in the soil and typically quickly produce fibrous roots, they need to develop transport capacity rapidly so as to avoid becoming a bottleneck to the absorbed water of the developing fibrous roots and, as we hypothesized, immediately activate a specific type of autophagy at a precise time of their development.</p></div><div type="abstract" xml:lang="en"><p><b>METHODS</b></p><p>Using microscopy techniques, we monitored xylem development in Populus trichocarpa roots in the first 7 d after emergence under field conditions.</p></div><div type="abstract" xml:lang="en"><p><b>KEY RESULTS</b></p><p>Newly formed pioneer roots contained more primary xylem poles and had larger diameter tracheary elements than fibrous roots. While xylogenesis started later in pioneer roots than in fibrous, it was completed at the same time, resulting in functional vessels on the third to fourth day following root emergence. Programmed cell death was responsible for creating the water conducting capacity of xylem. Although the early xylogenesis processes were similar in fibrous and pioneer roots, secondary vascular development proceeded much more rapidly in pioneer roots.</p></div><div type="abstract" xml:lang="en"><p><b>CONCLUSIONS</b></p><p>Compared to fibrous roots, rapid development of transport capacity in pioneer roots is not primarily caused by accelerated xylogenesis but by larger and more numerous tracheary elements and by rapid initiation of secondary growth.</p></div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">22917946</PMID><DateCompleted><Year>2013</Year><Month>05</Month><Day>01</Day></DateCompleted><DateRevised><Year>2012</Year><Month>09</Month><Day>07</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1537-2197</ISSN><JournalIssue CitedMedium="Internet"><Volume>99</Volume><Issue>9</Issue><PubDate><Year>2012</Year><Month>Sep</Month></PubDate></JournalIssue><Title>American journal of botany</Title><ISOAbbreviation>Am J Bot</ISOAbbreviation></Journal><ArticleTitle>Avoiding transport bottlenecks in an expanding root system: xylem vessel development in fibrous and pioneer roots under field conditions.</ArticleTitle><Pagination><MedlinePgn>1417-26</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.3732/ajb.1100552</ELocationID><Abstract><AbstractText Label="PREMISE OF THE STUDY" NlmCategory="OBJECTIVE">Root systems develop to effectively absorb water and nutrients and to rapidly transport these materials to the transpiring shoot. In woody plants, roots can be born with different functions: fibrous roots are primarily used for water and nutrient absorption, whereas pioneer roots have a greater role in transport. Because pioneer roots extend rapidly in the soil and typically quickly produce fibrous roots, they need to develop transport capacity rapidly so as to avoid becoming a bottleneck to the absorbed water of the developing fibrous roots and, as we hypothesized, immediately activate a specific type of autophagy at a precise time of their development.</AbstractText><AbstractText Label="METHODS" NlmCategory="METHODS">Using microscopy techniques, we monitored xylem development in Populus trichocarpa roots in the first 7 d after emergence under field conditions.</AbstractText><AbstractText Label="KEY RESULTS" NlmCategory="RESULTS">Newly formed pioneer roots contained more primary xylem poles and had larger diameter tracheary elements than fibrous roots. While xylogenesis started later in pioneer roots than in fibrous, it was completed at the same time, resulting in functional vessels on the third to fourth day following root emergence. Programmed cell death was responsible for creating the water conducting capacity of xylem. Although the early xylogenesis processes were similar in fibrous and pioneer roots, secondary vascular development proceeded much more rapidly in pioneer roots.</AbstractText><AbstractText Label="CONCLUSIONS" NlmCategory="CONCLUSIONS">Compared to fibrous roots, rapid development of transport capacity in pioneer roots is not primarily caused by accelerated xylogenesis but by larger and more numerous tracheary elements and by rapid initiation of secondary growth.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Bagniewska-Zadworna</LastName><ForeName>Agnieszka</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Department of General Botany, Institute of Experimental Biology, Faculty of Biology, A. 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Eissenstat</name><name sortKey="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name><name sortKey="Zadworny, Marcin" sort="Zadworny, Marcin" uniqKey="Zadworny M" first="Marcin" last="Zadworny">Marcin Zadworny</name></noCountry><country name="Pologne"><noRegion><name sortKey="Bagniewska Zadworna, Agnieszka" sort="Bagniewska Zadworna, Agnieszka" uniqKey="Bagniewska Zadworna A" first="Agnieszka" last="Bagniewska-Zadworna">Agnieszka Bagniewska-Zadworna</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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