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Authors Zimmermann, U; Wagner, HJ; Heidecker, M; Mimietz, S; Schneider, H; Szimtenings, M; Haase, A; Mitlohner, R; Kruck, W; Hoffmann, R; Konig, W
Author Full Name Zimmermann, U; Wagner, HJ; Heidecker, M; Mimietz, S; Schneider, H; Szimtenings, M; Haase, A; Mitlohner, R; Kruck, W; Hoffmann, R; Konig, W
Title Implications of mucilage on pressure bomb measurements and water lifting in trees rooting in high-salinity water
Source TREES-STRUCTURE AND FUNCTION
Language English
Document Type Article; Proceedings Paper
Conference Title International Symposium on Mangroves
Conference Date JUL 10-12, 2001
Conference Location TOKYO, JAPAN
Conference Sponsors Univ Tokyo, Res Ctr Adv Sci & Technol, Ebara Corp, UNESCO Man & Biosphere Program
Author Keywords cohesion theory; mangroves; pressure bomb; H-1-NMR imaging; cavitation
Keywords Plus LIANA TETRASTIGMA-VOINIERIANUM; CELL TURGOR PRESSURE; XYLEM PRESSURE; RESURRECTION PLANT; PROBE MEASUREMENTS; DIURNAL CHANGES; MAIZE PLANTS; TRANSPORT; INTACT; DESICCATION
Abstract Various studies on mangroves and other tall trees rooting in high-salinity water have given compelling evidence that tension is not the only factor in water lifting as thought by plant physiologists. A characteristic feature of these trees is that the tissue cells, the apoplastic space and, in particular, the lumen and the inner walls of many xylem vessels of the roots, the trunk and the branches (up to the apex) contain mucilage. Data on single marine giant algal cells are presented that show that mucilage reduces the chemical activity of water. Longitudinal gradients in the chemical activity of water and interfacial forces are presumably the dominant forces for water lifting. In order to save water on its tortuous pathway to the uppermost foliage trees apparently use different strategies (as revealed by H-1-NMR imaging), e.g. reduction of the conducting xylem area in the branches at intermediate height by mucilage or interruption of the xylem water columns by gas-filled segments and water lifting through mucilage networks and surface films. Pressure bomb experiments over the entire height of the trees revealed clearly that balancing pressure values cannot be taken as a measure for xylem tension. Such values can be used generally for an estimation of the chemical potential of water in the xylem of leafy twigs under atmospheric pressure, mu(w,h)=0, provided that a species-specific
Author Address Univ Wurzburg, Lehrstuhl Biotechnol, Biozentrum, Wurzburg, Germany; Univ Wurzburg, Lehrstuhl Expt Phys 5 Biophys, Wurzburg, Germany; Univ Gottingen, Inst Waldbau, Abt 2, Gottingen, Germany; Bundesanstalt Geowissensch & Rohstoffe, D-3000 Hannover, Germany; GEODATA, Cochabamba, Bolivia
Reprint Address Zimmermann, U (reprint author), Univ Wurzburg, Lehrstuhl Biotechnol, Biozentrum, Wurzburg, Germany.
E-mail Address zimmerma@biozentrum.uni-wuerzburg.de
ORCID Number Haase, Axel/0000-0001-5588-3742
Times Cited 21
Total Times Cited Count (WoS, BCI, and CSCD) 26
Publisher SPRINGER HEIDELBERG
Publisher City HEIDELBERG
Publisher Address TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
ISSN 0931-1890
29-Character Source Abbreviation TREES-STRUCT FUNCT
ISO Source Abbreviation Trees-Struct. Funct.
Publication Date MAR
Year Published 2002
Volume 16
Issue 2-3
Beginning Page 100
Ending Page 111
Digital Object Identifier (DOI) 10.1007/s00468-001-0135-5
Page Count 12
Web of Science Category Forestry
Subject Category Forestry
Document Delivery Number 553LM
Unique Article Identifier WOS:000175676700006
Plants associated with this reference

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