Measuring Roots. An Updated Approach

0371770 - ÚH 2013 RIV DE eng M - Část monografie knihy
Nadezhdina, N. - David, T. S. - David, J. S. - Nadezhdin, V. - Čermák, J. - Gebauer, R. - Ferreira, M. I. - Conceicao, N. - Dohnal, M. - Tesař, Miroslav - Gartner, K. - Ceulemans, R.
Root function. In situ studies through sap flow research.
Measuring Roots. An Updated Approach. Berlin Heidelberg: Springer-Verlag, 2012 - (Mancuso, S.), s. 267-290. ISBN 978-3-642-22066-1
Grant CEP: GA ČR GA205/08/1174; GA MŽP SP/1A6/151/07
Grant ostatní: GA ČR(CZ) GA526/08/1050
Klíčová slova: experimental treatments * hydraulic redistribution * sap flow
Kód oboru RIV: EF - Botanika

Sap flow measured by the Heat Field Deformation technique, HFD, is sensitive to flow responses to small changes in water potential gradients within the tree hydraulic systems. When these changes occur abruptly, under experimental treatments (severing, localized irrigation, heavy loading), sap flow movement can be used as a marker to study root functionality, e. g., root ability to redistribute water and withstand heavy machinery pressure. Experiments also showed that a compensation mechanism may operate in trees, with a temporary increase in the absorbed water due to a preferential use of one part of the root system when another part is damaged or when a water source is lost. Long-term measurements of root sap flow allow distinguishing between water uptake from shallow and deep rooted trees, at different exposures at a forest edge and from healthy and infected trees. Root sap flow can be used as an indicator of tree stress or of the prevailing mechanisms used by trees to survive drought, under irrigation or rain fed conditions.
Trvalý link: http://hdl.handle.net/11104/0007347