Seasonal change in the drought response of wood cell development in poplar.
Identifieur interne : 003A78 ( Main/Exploration ); précédent : 003A77; suivant : 003A79Seasonal change in the drought response of wood cell development in poplar.
Auteurs : Matthias Arend [Allemagne] ; Jörg FrommSource :
- Tree physiology [ 0829-318X ] ; 2007.
Descripteurs français
- KwdFr :
- Bois (croissance et développement), Bois (cytologie), Bois (métabolisme), Catastrophes (MeSH), Eau (métabolisme), Populus (anatomie et histologie), Populus (croissance et développement), Populus (métabolisme), Saisons (MeSH), Structures de plante (croissance et développement), Structures de plante (cytologie), Structures de plante (métabolisme), Xylème (croissance et développement), Xylème (cytologie), Xylème (métabolisme).
- MESH :
- anatomie et histologie : Populus.
- croissance et développement : Bois, Populus, Structures de plante, Xylème.
- cytologie : Bois, Structures de plante, Xylème.
- métabolisme : Bois, Eau, Populus, Structures de plante, Xylème.
- Catastrophes, Saisons.
English descriptors
- KwdEn :
- Disasters (MeSH), Plant Structures (cytology), Plant Structures (growth & development), Plant Structures (metabolism), Populus (anatomy & histology), Populus (growth & development), Populus (metabolism), Seasons (MeSH), Water (metabolism), Wood (cytology), Wood (growth & development), Wood (metabolism), Xylem (cytology), Xylem (growth & development), Xylem (metabolism).
- MESH :
- chemical , metabolism : Water.
- anatomy & histology : Populus.
- cytology : Plant Structures, Wood, Xylem.
- growth & development : Plant Structures, Populus, Wood, Xylem.
- metabolism : Plant Structures, Populus, Wood, Xylem.
- Disasters, Seasons.
Abstract
Field-grown poplar trees (Populus nigra L. x P. maximowiczii Henry, clone Kamabuchi) were exposed to severe drought twice during the growing season to evaluate the impact on wood cell development. The drought treatment caused a reduction in leaf water potential, leaf wilting and a decreased concentration of osmotically active solutes in the cambial zone. Drought-induced changes in the anatomy of developing xylem cells were examined in stem sections and macerated wood samples. In early summer, drought significantly reduced the length and cross-sectional area of newly formed fibers, whereas no such effects were observed in late summer. In well-watered trees, fiber cross-sectional area declined between early and late summer. Similarly, drought reduced the cross-sectional area of vessel elements in early summer but not in late summer, whereas in both control and drought-treated trees, the cross-sectional area of vessel elements decreased between early and late summer. The vessel area to xylem area ratio was unaffected by drought because the drought-induced decrease in vessel size was matched by an increase in the number of newly formed vessel cells. In contrast to its effect in early summer, late-summer drought had no significant effect on fiber and vessel cell development, indicating that sensitivity of wood cell development to drought varies seasonally.
DOI: 10.1093/treephys/27.7.985
PubMed: 17403651
Affiliations:
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scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Structures</term><term>Populus</term><term>Wood</term><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Bois</term><term>Eau</term><term>Populus</term><term>Structures de plante</term><term>Xylème</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Disasters</term><term>Seasons</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Catastrophes</term><term>Saisons</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Field-grown poplar trees (Populus nigra L. x P. maximowiczii Henry, clone Kamabuchi) were exposed to severe drought twice during the growing season to evaluate the impact on wood cell development. The drought treatment caused a reduction in leaf water potential, leaf wilting and a decreased concentration of osmotically active solutes in the cambial zone. Drought-induced changes in the anatomy of developing xylem cells were examined in stem sections and macerated wood samples. In early summer, drought significantly reduced the length and cross-sectional area of newly formed fibers, whereas no such effects were observed in late summer. In well-watered trees, fiber cross-sectional area declined between early and late summer. Similarly, drought reduced the cross-sectional area of vessel elements in early summer but not in late summer, whereas in both control and drought-treated trees, the cross-sectional area of vessel elements decreased between early and late summer. The vessel area to xylem area ratio was unaffected by drought because the drought-induced decrease in vessel size was matched by an increase in the number of newly formed vessel cells. In contrast to its effect in early summer, late-summer drought had no significant effect on fiber and vessel cell development, indicating that sensitivity of wood cell development to drought varies seasonally.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">17403651</PMID><DateCompleted><Year>2007</Year><Month>09</Month><Day>11</Day></DateCompleted><DateRevised><Year>2019</Year><Month>05</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>27</Volume><Issue>7</Issue><PubDate><Year>2007</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Seasonal change in the drought response of wood cell development in poplar.</ArticleTitle><Pagination><MedlinePgn>985-92</MedlinePgn></Pagination><Abstract><AbstractText>Field-grown poplar trees (Populus nigra L. x P. maximowiczii Henry, clone Kamabuchi) were exposed to severe drought twice during the growing season to evaluate the impact on wood cell development. The drought treatment caused a reduction in leaf water potential, leaf wilting and a decreased concentration of osmotically active solutes in the cambial zone. Drought-induced changes in the anatomy of developing xylem cells were examined in stem sections and macerated wood samples. In early summer, drought significantly reduced the length and cross-sectional area of newly formed fibers, whereas no such effects were observed in late summer. In well-watered trees, fiber cross-sectional area declined between early and late summer. Similarly, drought reduced the cross-sectional area of vessel elements in early summer but not in late summer, whereas in both control and drought-treated trees, the cross-sectional area of vessel elements decreased between early and late summer. The vessel area to xylem area ratio was unaffected by drought because the drought-induced decrease in vessel size was matched by an increase in the number of newly formed vessel cells. 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