Scientific Commons: Kathy Steppe

Determining reference values for stem water potential and maximum daily trunk shrinkage in young apple trees based on plant responses to water deficit (2009)

Reducing energy use in greenhouses contributes to the profitability of horticulture. Important energy savings can be realized through the use of temperature integration. However, such a greenhouse...

Use of Unfold PCA for on-line plant stress monitoring and sensor failure detection (2009)

Villez, Kris, Steppe, Kathy, De Pauw, Dirk

Changes in BVOC emission pattern from Fagus sylvatica L. measured by thermal desorber GC-MS (2009)

Joó, Eva, Van Langenhove, Herman, Schietse, Lieselotte, Pokorska, Olga, Simpraga, Maja, Steppe, Kathy, ...

Branch enclosure BVOC flux measurements from Fagus sylvatica L. in a natural forest environment : preliminary results (2009)

Demarcke, Marie, Amelynck, C, Schoon, N, Müller, JF, Joó, Eva, Dewulf, Jo, ...

Identifiability analysis and improvement of a tree water flow and storage model (2008)

De Pauw, Dirk, Steppe, Kathy, De Baets, Bernard

Report on non-temperature related variations in CO2 efflux rates from young tree stems in the dormant season (2008)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Origin, fate and significance of CO2 in tree stems (2008)

TESKEY, RO, Saveyn, An, Steppe, Kathy, MCGUIRE, MA

Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress. (2008)

Vermeulen, Kristof, Steppe, Kathy, Linh, Nguyen Sy, De Backer, Lieven, Bleyaert, Peter, Dekock, Jan, ...

Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate (2008)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

The spatial and diurnal variability of sap flow in a mature beech tree (Fagus sylvatica L.) was investigated on days with different climatic conditions (sunny, cloudy, rainy), during the summer. Sap...

Validation of a dynamic stem diameter variation model and the resulting seasonal changes in calibrated parameter values (2008)

Steppe, Kathy, De Pauw, Dirk, Lemeur, Raoul

Validation of ecological models is not a straightforward task and much controversy exists in the published literature on the exact definition. A lot of approaches have been suggested, without one...

Unravelling the output uncertainty of a tree water flow and storage model using several global sensitivity analysis methods (2008)

De Pauw, Dirk, Steppe, Kathy, De Baets, Bernard

The output uncertainty of two variables (stem sap flow rate and stem diameter variations) of a tree water flow and storage model is broken down into its different constituents using two global...

A step towards new irrigation scheduling strategies using plant-based measurements and mathematical modelling (2008)

Steppe, Kathy, De Pauw, Dirk, Lemeur, Raoul

Because of the increasing worldwide shortage of freshwater and costs of irrigation, a new plant-based irrigation scheduling method is proposed. In this method, two real-time plant-based measurements...

ANAFORE: A stand-scale process-based forest model that includes wood tissue development and labile carbon storage in trees (2008)

Deckmyn, G., Verbeeck, Hans, Vansteenkiste, Dries, Steppe, Kathy, Ceulemans, R.

A stand-scale forest model has been developed that dynamically simulates, besides carbon (C) and water (H2O) fluxes, wood tissue development from physiological principles. The forest stand is...

Stem respiration and carbon dioxide efflux of young Populus deltoides trees in relation to temperature and xylem carbon dioxide concentration (2008)

Saveyn, An, Steppe, Kathy, McGuire, Mary Anne, Lemeur, Raoul, Teskey, Robert O.

Oxidative respiration is strongly temperature driven. However, in woody stems, efflux of CO2 to the atmosphere (E-A), commonly used to estimate the rate of respiration (R-S), and stem temperature...

Growth Response of Hedera helix L. to Temperature Integration (2008)

Pollet, Bruno, Steppe, Kathy, Dambre, P., Van Labeke, Marie-Christine, Lemeur, Raoul

Reducing energy use in greenhouses contributes to the profitability of the horticultural industry. Important energy savings can be realized through the use of temperature integration. However, such a...

Partial rootzone drying of drip irrigated 'Navel' orange trees [Citrus sinensis (L.) Osbeck] under semi-arid tropical conditions (2008)

Dzikiti, S., Steppe, Kathy, Lemeur, Raoul

The diurnal transpiration of 'Navel' orange trees [Citrus sinensis (L.) Osbeck], inferred from sap flow measurements, followed periodic oscillations due to the cyclic opening and closing of stomata...

A novel methodology for irrigation scheduling using plant-based measurements and mathematical modelling (2008)

Steppe, Kathy, Lemeur, Raoul, De Pauw, Dirk

Because water is a scarce resource with often intense competition between different users, the search for an optimal irrigation strategy remains an important research objective. In the present study,...

Chlorophyll fluorescence as a tool for evaluation of drought stress (2008)

Razavi Hosseinabadi, Farzaneh, Pollet, Bruno, Steppe, Kathy, Van Labeke, Marie-Christine

The effect of water deficit on chlorophyll fluorescence, sugar content, and growth parameters of strawberry ( Fragaria x ananassa Duch. cv. Elsanta) was studied. Drought stress caused significant...

Stomatal regulation by microclimate and tree water relations: interpreting ecophysiological field data with a hydraulic plant model (2007)

Zweifel, Roman, Steppe, Kathy, Sterck, Frank J.

Dynamics in microclimate and physiological plant traits were studied for Pubescent oak and Scots pine in a dry inner-alpine valley in Switzerland, at a 10 min resolution for three consecutive years...

Solutions to overcome pitfalls of two automated systems for direct measurement of greenhouse tomato water uptake (2007)

Vermeulen, Kristof, Steppe, Kathy, Janssen, Katrien, Bleyaert, Peter, Dekock, Jan; U0043107, Aerts, Jean-Marie; U0002494, ...

Two promising techniques to measure water uptake in a direct way were evaluated on substrate-grown truss tomato plants (Lycopersicon esculentum 'Clothilde'). The first technique, which is called the...

Effects of ring-porous and diffuse-porous stem wood anatomy on the hydraulic parameters used in a water flow and storage model (2007)

Steppe, Kathy, Lemeur, Raoul

Solutions to overcome pitfalls of two automated systems for direct measurement of greenhouse tomato water uptake (2007)

Vermeulen, Kristof, Steppe, Kathy, JANSSEN, K, BLEYAERT, P, DEKOCK, J, AERTS, JM, ...

Daytime depression in tree stem CO2 efflux rates: Is it caused by low stem turgor pressure? (2007)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Drought and the diurnal patterns of stem CO2 efflux and xylem CO2 concentration in young oak (Quercus robur) (2007)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Whole-tree level water balance and its implications on stomatal oscillations in orange trees [Citrus sinensis (L.) Osbeck] under natural climatic conditions (2007)

Dzikiti, Sebinasi, Steppe, Kathy, Lemeur, Raoul, MILFORD, JR

Three-dimensional analysis of wood structure: X--ray computed microtomography (microCT) of vessel networks and atomic force microscopy (AFM) of pit membranes (2007)

JANSEN, S, PLETSERS, A, Steppe, Kathy, Cnudde, Veerle, Masschaele, Bert, CHOAT, B, ...

Three-dimensional imaging of wood anatomical characters using X–ray computed microtomography (microCT) and atomic force microscopy (AFM) (2007)

JANSEN, S, PLETSERS, A, Steppe, Kathy, Cnudde, Veerle, Masschaele, Bert, CHOAT, B, ...

Growth response of Hedera helix L. to temperature integration (2007)

Pollet, Bruno, Steppe, Kathy, DAMBRE, P, Van Labeke, Marie-Christine, Lemeur, Raoul

Dynamic response of Crassulacean Acid Metabolism in Phalaenopsis to a warm day/cool night temperature regime (2007)

Pollet, Bruno, Steppe, Kathy, DAMBRE, P, Van Labeke, Marie-Christine, Lemeur, Raoul

Simulatnion of sap flow in a beech tree by means of a dynamic data-based model as influenced by a solar eclipse (2007)

AERTS, JM, Steppe, Kathy, BOONEN, C, Lemeur, Raoul, BERCKMANS, D

Stored water use and transpiration in Scots pine: a modeling analysis with ANAFORE (2007)

VERBEECK, H, Steppe, Kathy, NADEZHDINA, N, DECKMYN, G, MEIRESONNE, L, ...

Resistance to radial CO2 diffusion contributes to between-tree variation in CO2 efflux of Populus deltoides stems (2007)

Steppe, Kathy, Saveyn, An, MCGUIRE, MA, Lemeur, Raoul, TESKEY, RO

Stomatal regulation by microclimate and tree water relations: interpreting ecophysiological field data with a hydraulic plant model (2007)

ZWEIFEL, R, Steppe, Kathy, STERCK, FJ

Model analysis of the effects of atmospheric drivers on storage water use in Scots pine (2007)

VERBEECK, H, Steppe, Kathy, NADEZHDINA, N, DE BEECK, MO, DECKMYN, G, MEIRESONNE, L, ...

Atmospheric drivers of storage water use in Scots pine. (2007)

VERBEECK, H, Steppe, Kathy, NADEZHDINA, N, DECKMYN, G, MEIRESONNE, L, ...

Distinction between water and sugar transport by double girdling in oak tree. (2007)

De Schepper, Veerle, Steppe, Kathy, Lemeur, Raoul

Daytime Depression in Tree Stem CO2 Efflux Rates: Is it Caused by Low Stem Turgor Pressure? (2007)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Background and Aims Daytime CO2 efflux rates (FCO2) from tree stems are often reported to be lower than expected from the exponential relationship between temperature and respiration. Explanations of...

Daytime Depression in Tree Stem CO2 Efflux Rates: Is it Caused by Low Stem Turgor Pressure? (2007)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Background and Aims Daytime CO2 efflux rates (FCO2) from tree stems are often reported to be lower than expected from the exponential relationship between temperature and respiration. Explanations of...

Daytime Depression in Tree Stem CO2 Efflux Rates: Is it Caused by Low Stem Turgor Pressure? (2007)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Background and Aims Daytime CO2 efflux rates (FCO2) from tree stems are often reported to be lower than expected from the exponential relationship between temperature and respiration. Explanations of...

A mathematical model linking tree sap flow dynamics to daily stem diameter fluctuations and radial stem growth (2006)

Steppe, Kathy, De Pauw, Dirk, Lemeur, Raoul, VANROLLEGHEM, PA

Stomatal oscillations in orange trees under natural climatic conditions (2006)

Steppe, Kathy, Dzikiti, Sebinasi, Lemeur, Raoul, MILFORD, JR

Is wood analysis a useful tool for studying growth respiration in tree stems? (2006)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Effect van droogtestress op de respiratiesnelheid van een jonge eikenstam (2006)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul

Effects of different levels of water stress on leaf water potential, stomatal resistance, protein and chlorophyll content and certain anti-oxidative enzymes in tomato plants (2006)

ZGALLAI, H, Steppe, Kathy, Lemeur, Raoul

Effects of severe water stress on partitioning of C-14-assimilates in tomato plants (2006)

ZGALLAI, H, Steppe, Kathy, Lemeur, Raoul

A comprehensive model for simulating stem diameter fluctuations and radial stem growth (2006)

Steppe, Kathy, Saveyn, An, Vermeulen, Kristof, Lemeur, Raoul

Crop monitoring by means of an on-line early warning system (2006)

DEKOCK, J, AERTS, JM, BERCKMANS, D, Vermeulen, Kristof, Steppe, Kathy, Lemeur, Raoul, ...

Water use by young navel orange trees (Citrus sinensis (L.) Osbeck) in Zimbabwe (2006)

DZIKITI, S, MILFORD, JR, Steppe, Kathy, Lemeur, Raoul

Water use efficiency of citrus plantations in Southern Africa (2006)

Steppe, Kathy, DZIKITI, S, Lemeur, Raoul

Stomatal Oscillations in Orange Trees under Natural Climatic Conditions (2006)

STEPPE, KATHY, DZIKITI, SEBINASI, LEMEUR, RAOUL, MILFORD, JAMES R.

• Background and Aims Stomatal oscillations have been reported in many plant species, but they are usually induced by sudden step changes in the environment when plants are grown under constant...

Stomatal Oscillations in Orange Trees under Natural Climatic Conditions (2006)

STEPPE, KATHY, DZIKITI, SEBINASI, LEMEUR, RAOUL, MILFORD, JAMES R.

• Background and Aims Stomatal oscillations have been reported in many plant species, but they are usually induced by sudden step changes in the environment when plants are grown under constant...

Study of temperature-independent variations in CO2 efflux rates in a young beech stem (2005)

Saveyn, An, Steppe, Kathy, Lemeur, Raoul, Samson, Roeland

Watergebruik in de glastuinbouw (2005)

Steppe, Kathy, Lemeur, Raoul

Sap flow dynamics of navel orange trees [Citrus Sinensis (L.) Osbeck] with partially stressed root zones in northeast Zimbabwe (2005)

Dzikiti, Sebinasi, Steppe, Kathy, Lemeur, Raoul, MILFORD, J, MEIXNER, F

Bio-sensors shed new light on screening of transgenic crops (2005)

Steppe, Kathy, Lemeur, Raoul

Unravelling the relationship between stem temperature and air temperature to correct for errors in sap-flow calculations using stem heat balance sensors (2005)

Steppe, Kathy, Lemeur, Raoul, DIERICK, D

Photosynthetic, physiological and biochemical responses of tomato plants to polyethylene glycol-induced water deficit (2005)

ZGALLAI, H, Steppe, Kathy, Lemeur, Raoul