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001     58851
005     20200423204532.0
024 7 _ |2 pmid
|a pmid:19470103
024 7 _ |2 DOI
|a 10.1111/j.1438-8677.2008.00124.x
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|2 altmetric
037 _ _ |a PreJuSER-58851
041 _ _ |a eng
082 _ _ |a 580
084 _ _ |2 WoS
|a Plant Sciences
100 1 _ |0 P:(DE-HGF)0
|a Westhoff, M.
|b 0
245 _ _ |a Evidence for discontinuous water columns in the xylem conduit of tall birch trees
260 _ _ |a Oxford [u.a.] :Wiley- Blackwell
|b Wiley-Blackwell - STM
|c 2009
300 _ _ |a 307 - 327
336 7 _ |a Journal Article
|0 PUB:(DE-HGF)16
|2 PUB:(DE-HGF)
336 7 _ |a Output Types/Journal article
|2 DataCite
336 7 _ |a Journal Article
|0 0
|2 EndNote
336 7 _ |a ARTICLE
|2 BibTeX
336 7 _ |a JOURNAL_ARTICLE
|2 ORCID
336 7 _ |a article
|2 DRIVER
440 _ 0 |0 10981
|a Plant Biology
|v 11
|x 1435-8603
|y 3
500 _ _ |a The authors are extremely grateful to the second mayor of the town of Rimpar, U. Haase and to the forester W. Pospichal for giving permission to fell a large number of tall birches in the forest of Rimpar. We would also like to thank very much our tree climbers P. Berecry and G. Fleischmann for professional tree felling, sample collection and rope-assisted lowering of the trees. Special thanks go to our numerous helpers in the field: W. Bauer, M. Behringer, A. Biegner, J. Endter, A. Gessner, F. Groeber, B. Hofmann, M. Kiesel, M. Kullik, C. Low, K. Muller, S. Nieft, L. Plie ss, K. Pfeffer, R. Reuss, M. Tarantola and G. Zimmermann. Sincere thanks are also given to K. Schwuchow and S. Nieft for excellent performance of some of the microscopic investigations and to A. Liebrich, O. Reichert and N. Spindler for their great help in evaluating the enormous bulk of data. This work was supported by grants from the BMBF to E.B. and U.Z. (0313369B).
520 _ _ |a The continuity of the xylem water columns was studied on 17- to 23-m tall birch trees (trunk diameter about 23 cm; first branching above 10 m) all year round. Fifty-one trees were felled, and 5-cm thick slices or 2-m long boles were taken at regular, relatively short intervals over the entire height of the trees. The filling status of the vessels was determined by (i) xylem sap extraction from trunk and branch pieces (using the gas bubble-based jet-discharge method and centrifugation) and from trunk boles (using gravity discharge); (ii) (1)H nuclear magnetic resonance imaging of slice pieces; (iii) infusion experiments (dye, (86)Rb(+), D(2)O) on intact trees and cut branches; and (iv) xylem pressure measurements. This broad array of techniques disclosed no evidence for continuous water-filled columns, as postulated by the Cohesion-Tension theory, for root to apex directed mass transport. Except in early spring (during the xylem refilling phase) and after extremely heavy rainfall during the vegetation period, cohesive/mobile water was found predominantly at intermediate heights of the trunks but not at the base or towards the top of the tree. Similar results were obtained for branches. Furthermore, upper branches generally contained more cohesive/mobile water than lower branches. The results suggest that water lifting occurs by short-distance (capillary, osmotic and/or transpiration-bound) tension gradients as well as by mobilisation of water in the parenchymatic tissues and the heartwood, and by moisture uptake through lenticels.
536 _ _ |0 G:(DE-Juel1)FUEK407
|2 G:(DE-HGF)
|a Terrestrische Umwelt
|c P24
|x 0
588 _ _ |a Dataset connected to Web of Science, Pubmed
650 _ 2 |2 MeSH
|a Betula: physiology
650 _ 2 |2 MeSH
|a Biological Transport: physiology
650 _ 2 |2 MeSH
|a Plant Roots: physiology
650 _ 2 |2 MeSH
|a Plant Stems: physiology
650 _ 2 |2 MeSH
|a Plant Transpiration: physiology
650 _ 2 |2 MeSH
|a Trees: physiology
650 _ 2 |2 MeSH
|a Water: physiology
650 _ 2 |2 MeSH
|a Xylem: physiology
650 _ 7 |0 7732-18-5
|2 NLM Chemicals
|a Water
650 _ 7 |2 WoSType
|a J
653 2 0 |2 Author
|a Betula pendula (birch)
653 2 0 |2 Author
|a Cohesion-Tension theory
653 2 0 |2 Author
|a cohesive water
653 2 0 |2 Author
|a H-1 NMR imaging
653 2 0 |2 Author
|a mobile water
653 2 0 |2 Author
|a pressure probe
653 2 0 |2 Author
|a xylem sap extraction
653 2 0 |2 Author
|a xylem water
700 1 _ |0 P:(DE-HGF)0
|a Zimmermann, D.
|b 1
700 1 _ |0 P:(DE-Juel1)129397
|a Schneider, H.
|b 2
|u FZJ
700 1 _ |0 P:(DE-HGF)0
|a Wegner, L.H.
|b 3
700 1 _ |0 P:(DE-HGF)0
|a Geßner, P.
|b 4
700 1 _ |0 P:(DE-HGF)0
|a Jakob, P.
|b 5
700 1 _ |0 P:(DE-HGF)0
|a Bamberg, E.
|b 6
700 1 _ |0 P:(DE-HGF)0
|a Shirley, St.
|b 7
700 1 _ |0 P:(DE-HGF)0
|a Bentrup, F.-W.
|b 8
700 1 _ |0 P:(DE-HGF)0
|a Zimmermann, U.
|b 9
773 _ _ |0 PERI:(DE-600)2026390-9
|a 10.1111/j.1438-8677.2008.00124.x
|g Vol. 11, p. 307 - 327
|p 307 - 327
|q 11<307 - 327
|t Plant biology
|v 11
|x 1435-8603
|y 2009
856 7 _ |u http://dx.doi.org/10.1111/j.1438-8677.2008.00124.x
856 4 _ |u https://juser.fz-juelich.de/record/58851/files/FZJ-58851.pdf
|z Published final document.
|y Restricted
909 C O |o oai:juser.fz-juelich.de:58851
|p VDB
913 1 _ |0 G:(DE-Juel1)FUEK407
|a DE-HGF
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914 1 _ |y 2009
915 _ _ |0 StatID:(DE-HGF)0010
|a JCR/ISI refereed
920 1 _ |0 I:(DE-Juel1)ICG-3-20090406
|d 31.10.2010
|g ICG
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|l Phytosphäre
|x 0
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980 _ _ |a UNRESTRICTED
981 _ _ |a I:(DE-Juel1)IBG-2-20101118
981 _ _ |a I:(DE-Juel1)ICG-3-20090406

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