An experimental system for analysis of the dynamic sap-flow characteristics in young trees: results of a beech tree

Functional Plant Biology : FPB
Kathy Steppe, Raoul Lemeur

Abstract

This paper describes an experimental system designed for analysis of the dynamic water flow through young trees, complemented with test results of a 2-year-old beech tree (Fagus sylvatica L.). The system allows automatic and simultaneous measurements of a complex set of plant physiological processes at leaf, branch, stem and root levels [transpiration (E), sap flow (F) and diameter fluctuations (Δd)], in combination with the micrometeorological variables that control these processes [soil and air temperature (Ts and Ta), vapour pressure deficit of the air (D) and photosynthetically active radiation (PAR)]. A 2-d experimental period was used to study the whole-tree water transport dynamics of the young beech tree. Good correspondence between E of the leaves and F in the supporting branch was found. An increased time lag between the F measurements along the hydraulic pathway down towards the root system was observed, indicating the non-steady-state nature of the water flow. The daytime Δd of stem and branch revealed the depletion and the replenishment of internal water reserves. The daily amount of water withdrawn from internal storage was 5% of the total daily transpiration. A good linear relationship was found between the rate ...Continue Reading

Citations

Mar 25, 2006·Journal of Experimental Botany·Roman ZweifelDavid M Newbery
Feb 24, 2010·Journal of Experimental Botany·Veerle De Schepper, Kathy Steppe
Jan 24, 2012·Journal of Experimental Botany·Veerle De SchepperKathy Steppe
Sep 10, 2011·Plant, Cell & Environment·Kathy SteppeThierry Améglio
Apr 7, 2019·Plant, Cell & Environment·Jeroen D M SchreelKathy Steppe
Jun 1, 2012·Functional Plant Biology : FPB·Annelies BaertKathy Steppe
Jan 1, 2006·Functional Plant Biology : FPB·Krõõt Aasamaa, Anu Sõber
Oct 18, 2011·Tree Physiology·Veerle De SchepperKathy Steppe
Sep 18, 2015·Tree Physiology·Tom De SwaefKathy Steppe
Oct 3, 2014·Tree Physiology·Annelies BaertKathy Steppe
Jan 13, 2018·Annals of Botany·Jonas R CoussementKathy Steppe
Apr 12, 2011·Annals of Botany·Veerle De Schepper, Kathy Steppe
Jul 10, 2018·Tree Physiology·Débora di FrancescantonioPaula I Campanello
Jan 11, 2021·Journal of Magnetic Resonance·Marco MeixnerCarel W Windt

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