Publications

Please email Kathy.Steppe@UGent.be for pdf copies of any paper.

2017

Maes W, Huete AR, Steppe K (2017) Optimizing the processing of UAV-based thermal imagery. Remote sensing 9, Article Number: 476.

Van de Wal BAE, Windt CW, Leroux O, Steppe K (2017) Heat girdling does not affect xylem integrity: an in vivo magnetic resonance imaging study in the tomato peduncle. New Phytologist 215, 558-568.

Van de Wal BAE, Van de Put HAL, Hanssens J and Steppe K (2017) Modelling the efffects of osmotic stress on tomato fruit development. Acta Horticulturae 1154: 201-206.

Berry CZ, Evaristo J, Moore G, Poca M, Steppe K, Verrot L, Asbjornsen H, Borma L, Bretfeld M, Hervé-Fernández P, Seyfried M, Schwendenmann L, Sinacore K, De Wispelaere L, McDonnell J (2017) The two water worlds hypothesis: addressing multiple working hypotheses and proposing a way forward. Ecohydrology, Published online: 10.1002/eco.1843.

Salomón RL, Limousin JM, Ourcival JM, Rodríguez-Calcerrada J, Steppe K (2017) Stem hydraulic capacitance decreases with drought stress: implications for modelling tree hydraulics in the Mediterranean oak Quercus ilex. Plant, Cell & Environment. Published online: 10.1111/pce.12928

Epila J, Maes WH, Verbeeck H, Van Camp J, Okullo JBL, Steppe K (2017) Plant measurements on African tropical Maesopsis eminii seedlings contradict pioneering water use behaviour. Environmental and Experimental Botany 135: 27-37.

Epila J, De Baerdemaeker NJF, Vergeynst LL, Maes WH, Beeckman H, Steppe K (2017) Capacitive water release and internal leaf water relocation delay drought-induced cavitation in African Maesopsis eminii. Tree Physiology 37: 481-490.

Epila J, Verbeeck H, Otim-Epila T, Okullo P, Kearsley E, Steppe K (2017) The ecology of Maesopsis eminii Engl. in tropical Africa. African Journal of Ecology, published online: 10.1111/aje.12408

Schenk HJ, Espino S, Romo DM, Nima N, Do AYT, Michaud JM, Papahadjopoulos-Sternberg B, Yang J, Zuo YY, Steppe K, Jansen S (2017) Xylem surfactants introduce a new element to the cohesion-tension theory. Plant Physiology 173: 1177-1196.

Swanckaert J, Pannecoucque J, Van Waes J, Steppe K, Van Labeke MC, Reheul D (2017) Stay-green characterization in Belgian forage maize. Journal of Agricultural Science 155: 766-776.

2016

Poyatos R, Granda V, Molowny-Horas R, Mencuccini M, Steppe K, Martinez-Vilalta J (2016) SAPFLUXNET: towards a global database of sap flow measurements. Tree Physiology 36: 1449-1455.

Sass-Klaassen U, Fonti P, Cherubini P, Gričar J, Robert EMR, Steppe K, Bräuning A (2016) A tree-centered approach to assess impacts of extreme climatic events on forests. Frontiers in Plant Science 7: Article number 1089.

Steppe K, von der Crone J, De Pauw DJW (2016) TreeWatch.net: a tree water and carbon monitoring network to assess instant tree hydraulic functioning and stem growth. Frontiers in Plant Science 7: Article 993.

Lintunen A, Paljakka T, Jyske T, Peltoniemi M, Sterck F, von Arx G, Cochard H, Copini P, Caldeira MC, Delzon S, Gebauer R, Grönlund L, Kiorapostolou N, Lechthaler S, Lobo-do-Vale R, Peters RL, Petit G, Prendin AL, Salmon Y, Steppe K, Urban J, Juan SR, Robert EMR, Hölttä T (2016) Osmolality and non-structural carbohydrate composition in the secondary phloem of trees across a latitudinal gradient in Europe. Frontiers in Plant Science 7: Article number 726.

Maes WH, Baert A, Huete AR, Minchin PEH, Snelgar WP, Steppe K (2016) A new wet reference target method for continuous infrared thermography of vegetations. Agricultural and Forest Meteorology 226: 119-131.

Van Meulebroek L, Hanssens J, Steppe K, Vanhaecke L (2016) Metabolic fingerprinting to assess the impact of salinity on carotenoid content in developing tomato fruits. International Journal of Molecular Sciences 17: Article number 821.

Bloemen J, Teskey RO, McGuire MA, Aubrey DP, Steppe K (2015) Root xylem CO2 flux: an important but unaccounted-for component of root respiration. Trees – Structure and Function 30: 343-352

Dillen M, Vanhellemont M, Verdonckt P, Maes WH, Steppe K, Verheyen K (2016) Productivity, stand dynamics and the selection effect in a mixed willow clone short rotation coppice plantation. Biomass and Bioenergy 87: 46‐54.

Vergeynst LL, Sause MGR, De Baerdemaeker NJF, De Roo L, Steppe K (2016) Clustering reveals cavitation-related acoustic emission signals from dehydrating branches. Tree Physiology 36: 786-796.

Vander Mijnsbrugge K, Turcsán A, Maes J, Duchêne N, Meeus S, Steppe K, Marijke Steenackers (2016) Repeated summer drought and re-watering during the first growing year of oak (Quercus petraea) delay autumn senescence and bud burst in the following spring. Frontiers in Plant Science 7: Article number 419.

Turcsán A, Steppe K, Sárközi E, Erdélyi É, Missoorten M, Mees G, Vander Mijnsbrugge K (2016) Early summer drought stress during the first growing year stimulates extra shoot growth in oak seedlings (Quercus petraea). Frontiers in Plant Science 7: Article number 193.

Braüning A, Steppe K (2016) Editorial note for the special issue on ‘Sap flow and hydraulic functioning’ of TREES: structure and function. Trees: structure and function 30: 1-3.

De Roo L, Vergeynst LL, De Baerdemaeker NJF, Steppe K (2016) Acoustic emissions to measure drought-induced cavitation in plants. Applied Sciences – Basel 6: 71, doi:10.3390/app6030071

De Deurwaerder H, Okello JA, Koedam N, Schmitz N, Steppe K (2016) How are anatomical and hydraulic features of the mangroves Avicennia marina and Rhizophora mucronata influ- enced by siltation? Trees: structure and function 30: 35-45.

Bloemen J, Vergeynst LL, Overlaet-Michiels L, Steppe K (2016) How important is woody tissue photosynthesis in poplar during drought stress? Trees – Structure and Function 30: 63-72

2015

Boussadia O, Steppe K, Van Labeke MC, Lemeur R, Braham M (2015) Effects of nitrogen deficiency on leaf chlorophyll fluorescence parameters in two olive tree cultivars ‘Meski’ and ‘Koroneiki’. Journal of Plant Nutrition 38: 2230-2246.

Hubeau M, Steppe K (2015) Plant-PET scans: in vivo mapping of xylem and phloem functioning. Trends in Plant Science 20: 676-685.

De Swaef T, De Schepper V, Vandegehuchte MW, Steppe K (2015) Stem diameter variations as a versatile research tool in ecophysiology. Tree Physiology 35: 1047-1061.

Vandegehuchte MW, Bloemen J, Vergeynst LL, Steppe K (2015) Woody tissue photosynthesis in trees: salve on the wounds of drought? New Phytologist 208: 998-1002.

Vergeynst LL, Sause MGR, Hamstad MA, Steppe K (2015) Deciphering acoustic emission signals in drought stressed branches: the missing link between source and sensor. Frontiers in Plant Science 6: 494.

Steppe K, Sterck F, Deslauriers A (2015) Diel growth dynamics in tree stems: linking anatomy and ecophysiology. Trends in Plant Science 20: 335-343.

Steppe K, Vandegehuchte MW, Tognetti R, Mencuccini M (2015) Sap flow as a key trait in the understanding of plant hydraulic functioning. Tree Physiology 35: 341-345.

Vergeynst LL, Dierick M, Bogaerts JAN, Cnudde V, Steppe K (2015) Cavitation: a blessing in disguise? New method to establish vulnerability curves and assess hydraulic capacitance of woody tissue. Tree Physiology 35: 400-409.

Vandegehuchte MW, Burgess SSO, Downey A, Steppe K (2015) Influence of stem temperature changes on heat pulse sap flux density measurements. Tree Physiology 35: 346–353.

Baert A, De Schepper V, Steppe K (2015) Variable hydraulic resistances and their impact on plant drought response modelling. Tree Physiology 35: 439-449.

Bloemen J, Bauweraerts I, De Vos F, Vanhove C, Vandenberghe S, Boeckx P, Steppe K (2015) Fate of xylem-transported 11C- and 13C-labelled CO2 in leaves of poplar. Physiologia Plantarum 153, 555-564.

Van Bockhaven J, Steppe K, Bauweraerts I, Kikuchi S, Asano T, Höfte M, De Vleesschauwer D (2015) Primary metabolism plays a central role in molding silicon-inducible brown spot resistance in rice. Molecular Plant Pathology 16: 811-824.

Ameye M, Audenaert K, De Zutter N, Steppe K, Van Meulebroek L, Vanhaecke L, De Vleesschauwer D, Haesaert G, Smagghe G (2015) Priming of wheat with the green leaf volatile Z-3-hexenyl acetate enhances defense against Fusarium graminearum but boosts deoxynivalenol production. Plant Physiology 167: 1671-1684.

Schenk HJ, Steppe K, Jansen S (2015) Nanobubbles: a new paradigm for air-seeding in xylem. Trends in Plant Science 20: 199-205.

Hanssens J, De Swaef T, Steppe K (2015) High light decreases xylem contribution to fruit growth in tomato. Plant, Cell & Environment 38: 487-498.

Van de Wal BAE, Guyot A, Lovelock CE, Lockington DA, Steppe K (2015) Influence of temporospatial variation in sap flux density on estimates of whole-tree water use in Avicennia marina. Trees – Structure and Function 29: 215-222.

Van Meulebroek L, Vanden Bussche J, De Clercq N, Steppe K, Vanhaecke L (2015) A metabolomics approach to unravel the regulating role of phytohormones towards carotenoid metabolism in tomato fruit. Metabolomics 11: 667-683.

Teskey RO, Wertin TM, Bauweraerts I, Ameye M, McGuire MA, Steppe K (2015) Responses of tree species to heat waves and extreme heat events. Plant, Cell & Environment 38: 1699-1712.

Baert A, Villez K, Steppe K (2015) Unfold principal component analysis and functional unfold principal component analysis for on-line plant stress detection. Acta Horticulturae 1068: 195-201.

Vanhassel P, Bleyaert P, Van Lommel J, Vandevelde I, Crappé S, Van Hese N, Hanssens J, Steppe K, Van Labeke MC (2015) Rise of nightly air humidity as a measure for tipburn prevention in hydroponic cultivation of butterhead lettuce. Acta Horticulturae 1107: 195-202.

Steppe K (2015) Contribution of plant sensors to new developments in horticulture. Acta Horticulturae 1099: 55-61.

De Swaef T, Vermeulen K, Vergote N,Van Lommel J, Van Labeke MC, Bleyaert P, Steppe K (2015) Plant sensors help to understand tipburn in lettuce. Acta Horticulturae 1099: 63-70.

2014

De Swaef T, Mellisho CD, Baert A, De Schepper V, Torrecillas A, Conejero W, Steppe K (2014) Model-assisted evaluation of crop load effects on stem diameter variations and fruit growth in peach. Trees – Structure and Function 28: 1607-1622.

Bauweraerts I, Mannaerts TBHL, Wertin TM, McGuire MA, Teskey RO, Steppe K (2014) Elevated [CO2] and growth temperature have a small positive effect on photosynthetic thermotolerance of Pinus taeda seedlings. Trees – Structure and Function 28: 1515-1526.

Maes WH, Minchin PEH, Snelgar WP, Steppe K (2014) Early detection of Psa infection in kiwifruit by means of infrared thermography at leaf and orchard scale. Functional Plant Biology 41: 1207-1220.

Van Meulebroek L, Vanden Bussche J, Steppe K, Vanhaecke L (2014) High-resolution Orbitrap mass spectrometry for the analysis of carotenoids in tomato fruit: validation and comparative evaluation towards UV-VIS and tandem mass spectrometry. Analytical and Bioanalytical Chemistry 406: 2613-2626.

Bauweraerts I, Ameye M, Wertin TM, McGuire MA, Teskey RO, Steppe K (2014) Acclimation effects of heat waves and elevated [CO2] on gas exchange and chlorophyll fluorescence of northern red oak (Quercus rubra L.) seedlings. Plant Ecology 215: 733-746.

Vandegehuchte MW, Guyot A, Hubeau M, De Groote SRE, De Baerdemaeker NJF, Hayes M, Welti N, Lovelock CE, Lockington DA, Steppe K (2014) Long-term versus daily stem diameter variation in co-occurring mangrove species: environmental versus ecophysiological drivers. Agricultural and Forest Meteorology 192-193: 51-58.

Manso S, De Muynck W, Segura I, Aguado A, Steppe K, Boon N, De Belie N (2014) Bioreceptivity evaluation of cementitious materials designed to stimulate biological growth. Science of the Total Environment 481: 232-241.

Vergeynst LL, Vandegehuchte MW, McGuire MA, Teskey RO, Steppe K (2014) Changes in stem water content influence sap flux density measurements with thermal dissipation probes. Trees – Structure and Function 28: 949-955.

Bauweraerts I, Ameye M, Wertin TM, McGuire MA, Teskey RO, Steppe K (2014) Water availability is the decisive factor for the growth of two tree species in the occurrence of consecutive heat waves. Agricultural and Forest Meteorology 189–190: 19–29.

Erda FG, Bloemen J, Steppe K (2014) Quantifying the impact of daily and seasonal variation in sap pH on xylem dissolved inorganic carbon estimates in plum trees. Plant Biology 16: 43-48.

Vandegehuchte MW, Guyot A, Hubeau M, De Swaef T, Lockington DA, Steppe K (2014) Modelling reveals endogenous osmotic adaptation of storage tissue water potential as an important driver determining different stem diameter variation patterns in the mangrove species Avicennia marina and Rhizophora stylosa. Annals of Botany 114: 667-676.

Verbeeck H, Betehndoh E, Maes WH, Hubau H, Kearsley E, Buggenhout L, Hufkens K, Huygens D, Van Acker J, Beeckman H, Mweru JPM, Boeckx P, Steppe K (2014) Functional leaf trait diversity of ten tree species in Congolese secondary tropical forest. Journal of Tropical Forest Science 26: 409-419.

Bloemen J, Agneessens L, Van Meulebroek L, Aubrey DP, McGuire MA, Teskey RO, Steppe K (2014) Stem girdling affects the quantity of CO2 transported in the xylem as well as CO2 efflux from the soil. New Phytologist 201: 897-907.

Hanssens J, De Swaef T, Pinxteren D, Marien H, Wittemans L, Desmedt J, Steppe K (2014) A decision support system for tomato growers based on plant responses and energy consumption. Acta Horticulturae 1037: 501-508.

2013

Šimpraga M, Verbeeck H, Bloemen J, Vanhaecke L, Demarcke M, Joó É, Pokorska O, Amelynck C, Schoon N, Dewulf J, Van Langenhove H, Heinesch B, Aubinet M, Steppe K (2013) Vertical canopy gradient in photosynthesis and monoterpenoid emissions: an insight into the chemistry and physiology behind. Atmospheric Environment 80: 85-95.

De Schepper V, De Swaef T, Bauweraerts I, Steppe K (2013) Phloem transport: a review of mechanisms and controls. Journal of Experimental Botany 64: 4839-4850.

Lewis SL, Sonké B, Sunderland T, Begne SK, Lopez-Gonzalez G, van der Heijden GMF, Phillips OL, Affum-Baffoe K, Baker TR, Banin L, Bastin J-F, Beeckman H, Boeckx P, Bogaert J, De Cannière C, Chezeaux E, Clark CJ, Collins M, Djagbletey G, Djuikouo MNK, Droissart V, Doucet J-L, Ewango CEN, Fauset S, Feldpausch TR, Foli EG, Gillet J-F, Hamilton AC, Harris DJ, Hart TB, de Haulleville T, Hladik A, Hufkens K, Huygens D, Jeanmart P, Jeffery KJ, Kearsley E, Leal ME, Lloyd L, Lovett JC, Makana J-R, Malhi Y, Marshall AR, Ojo L, Peh KSH, Pickavance G, Poulsen JR, Reitsma JM, Sheil D, Simo M, Steppe K, Taedoumg HE, Talbot J, Taplin JRD, Taylor D, Thomas SC, Toirambe B, Verbeeck H, Vleminckx J, White LJT, Willcock S, Woell H, Zemagho L (2013) Above- ground biomass and structure of 260 African tropical forests. Philosophical Transactions of the Royal Society B 368: 20120295.

Kearsley E, de Haulleville T, Hufkens K, Kidimbu A, Toirambe B, Baert G, Huygens D, Kebede Y, Defourny P, Bogaert J, Beeckman H, Steppe K, Boeckx P, Verbeeck H (2013) Conventional tree height-diameter relationships significantly overestimate aboveground carbon stocks in the Central Congo Basin. Nature Communications 4: 2269.

Campioli M, Verbeeck H, Van den Bossche J, Wu J, Ibrom A, D’Andrea E, Matteucci G, Samson R, Steppe K, Granier A (2013) Can decision rules simulate carbon allocation for years with contrasting and extreme weather conditions? A case study for three temperate beech forests Ecological Modelling 263: 42-55.

Lavu RVS, De Schepper V, Steppe K, Majeti PNV, Tack F, Du Laing G (2013) Use of selenium fertilizers for production of Se-enriched Kenaf (Hibiscus cannabinus): Effect on Se concentration and plant productivity. Journal of Plant Nutrition and Soil Science 176: 634-639.

Haouari A, Van Labeke MC, Steppe K, Ben Mariem F, Braham M, Chaieb M (2013) Fruit thinning affects photosynthetic activity, carbohydrate levels, shoot and fruit development of olive trees grown under semi-arid conditions. Functional Plant Biology 40: 1179-1186.

Laffineur Q, Aubinet M, Schoon N, Amelynck C, Müller J.-F., Dewulf J, Steppe K, Heinesch B (2013) Impact of diffuse light on isoprene and monoterpene emissions from a mixed temperate forest. Atmospheric Environment 74: 385-392.

De Schepper V, Bühler J, Thorpe M, Roeb G, Huber G, van Dusschoten D, Jahnke S, Steppe K (2013) 11C-PET imaging reveals transport dynamics and sectorial plasticity of oak phloem after girdling. Frontiers in Plant Science 4: article 200.

Bloemen J, McGuire MA, Aubrey DP, Teskey RO, Steppe K (2013) Assimilation of xylem-transported CO2 is dependent on transpiration rate but is small relative to atmospheric fixation. Journal of Experimental Botany 64: 2129-2138.

Van den Bulck N, Coomans M, Wittemans L, Hanssens J, Steppe K (2013) Monitoring and energetic performance analysis of an innovative ventilation concept in a Belgian greenhouse. Energy and Buildings 57: 51–57.

Baert A, Villez K, Steppe K (2013) Automatic drought stress detection in grapevines without using conventional threshold values. Plant and Soil 369, 439-452.
Vandegehuchte MW, Steppe K (2013) Sap flux density measurement methods: working principles and applicability. Functional Plant Biology 40: 213–223.

De Swaef T, Hanssens J, Cornelis A, Steppe K (2013) Non-destructive estimation of root pressure using sap flow, stem diameter measurements and mechanistic modelling. Annals of Botany 111: 271-282.

De Swaef T, Driever SM, Van Meulebroek L, Vanhaecke L, Marcelis LFM, Steppe K (2013) Understanding the effect of carbon status on stem diameter variations. Annals of Botany 111: 31-46

Bloemen J, McGuire MA, Aubrey DP, Teskey RO, Steppe K (2013) Transport of root-respired CO2 via the transpiration stream affects aboveground carbon assimilation and CO2 efflux in trees. New Phytologist 197: 555–565.

Bauweraerts I, Wertin TM, Ameye M, McGuire MA, Teskey RO, Steppe K (2013) The effect of heat waves, elevated [CO2] and low soil water availability on northern red oak (Quercus rubra L.) seedlings? Global Change Biology 19: 517-528.

Vergeynst LL, Bogaerts J, Baert A, Kips L, Steppe K (2013) New type of vulnerability curve gives insight in hydraulic capacitance and conductance of the xylem. Acta Horticulturae 991: 341-347.

Hanssens J, De Swaef T, Nadezhdina N, Steppe K (2013) Measurement of sap flow dynamics through the tomato peduncle using a non-invasive sensor based on the heat field deformation method. Acta Horticulturae 991: 409-416.

Vandegehuchte MW, Burgess SSO, Downey A, Steppe K (2013) Stem temperature influence on heat pulse sap flux density measurements. Acta Horticulturae 991: 85-92.

Vandegehuchte MW, Steppe K (2013) Eliminating the heat input as parameter in the Sapflow+ method. Acta Horticulturae 991: 93-100.

Bloemen J, Overlaet-Michiels L, Steppe K (2013) Understanding plant responses to drought: how important is woody tissue photosynthesis? Acta Horticulturae 991: 149-155.

Van de Wal BAE, Guyot A, Lovelock CE, Lockington DA, Steppe K (2013) Influence of spatial variation in sap flux density on estimates of whole-plant water use in Avicennia marina. Acta Horticulturae 991: 101-106.

Baert A, Steppe K (2013) Putting two water transport models to the test under wet and dry conditions. Acta Horticulturae 991: 359-366.

De Schepper V, Steppe K (2013) Tree girdling: a tool to improve our understanding of coupled sugar and water transport. Acta Horticulturae 990: 313-320.

Steppe K (2013) Water ascends in woody plants: so what? Acta Horticulturae 990: 305-311.

2012

Van den Bulck N, Coomans M, Wittemans L, Goen K, Hanssens J, Steppe K, Marien H, Desmedt J (2012) Energetic evaluation of a smart controlled greenhouse for tomato cultivation. Proceedings OF ECOS 2012.

Bloemen J, McGuire MA, Aubrey DP, Teskey RO, Steppe K (2012) Transport of root-respired CO2 via the transpiration stream affects aboveground carbon assimilation and CO2 efflux in trees. New Phytologist 197(2): 555-65.

Hanssens J, De Swaef T, Goen K, De Nayer F, Wittemans L, Marien H, Desmedt J, Steppe K (2012) Effect of stem age on the response of stem diameter variations to plant water status in tomato. Acta Horticulturae 952: 907-914.

Hanssens J, De Swaef T, Wittemans L, Goen K, Marien H, Desmedt J, Steppe K (2012) Model-assisted analysis of elevated temperature and vapour pressure deficit effects on tomato stem and fruit water balance. Acta Horticulturae 957: 37-44.

Nadezhdina N, Vandegehuchte MW, Steppe K (2012) Sap flux density measurements based on the heat field deformation method. Trees-Structure and Function 26(5): 1439-1448.

Vandegehuchte MW, Steppe K (2012) Finite Element Analysis as Aid in Understanding Heat Based Sap Flow Methods with Linear Heating. VIII International Symposium on Sap Flow 951: 63-70.

Maes WH, Verbist B (2012) Increasing the sustainability of household cooking in developing countries: policy implications. Renewable and Sustainable Energy Reviews 16(6): 4204-4221.

De Swaef T, Steppe K (2012) Coupling of a stem, fruit and leaf model to predict stem diameter variations in tomato. Acta Horticultuirae 957: 223-230.

De Swaef T, Steppe K (2012) Sap flow, stem diameter variations and mechanistic modelling have potential to assess root pressure. Acta Horticulturae 951: 111-115.

De Swaef T, Steppe K, Verbist K and Cornelis W (2012) Tomato stem and fruit diameter dynamics in response to changing water availability. Acta Horticulturae 952: 953-957.

De Swaef T, Vermeulen K, Vergote N, Van Lommel J, Van Labeke M-C, Bleyaert P, Steppe K (2012) Plant sensors help to understand tipburn in lettuce. Acta Horticulturae (in press).

Vandegehuchte MW, Steppe K (2012) Sap flux density measurement methods: working principles and applicability. Functional Plant Biology 40(3): 213-223.

De Schepper V, Holvoet K, Benedetti L, Seuntjens P, Vanrolleghem PA (2012) Extension of the River Water Quality Model No.1 with the fate of pesticides. Journal of hydroinformatics 14: 48-64.

Srikanth LRV, De Schepper V, Steppe K, Tack F, Du Laing G (2012) Selenium-selenite soil fertilisers increase the nutritional value of Kenaf (Hibiscus cannabinus) without lowering plant productivity. Journal of Plant Nutrition and Soil Science (minor revision).

De Weirdt M, Verbeeck H, Maignan F, Peylin P, Poulter B, Bonal D, Ciais P, Steppe K (2012) Seasonal leaf dynamics for tropical evergreen forests in a process based global ecosystem model. Geoscientific Model Development 5: 1-18.

Ameye M, Wertin TM, Bauweraerts I, McGuire MA, Teskey RO, Steppe K (2012) The effect of induced heat waves on Pinus taeda and Quercus rubra in ambient and elevated CO2 atmospheres. New Phytologist 196(2): 448-61.

Vandegehuchte MW, Steppe K (2012) Sapflow+: a four needle heat-pulse sap flow sensor enabling non-empirical sap flux density and water content measurements. New Phytologist 196(1): 306-317.

Maes WH, Steppe K (2012) Estimating evapotranspiration and drought stress with ground-based thermal remote sensing in agriculture: a review. Journal of Experimental Botany 63(13): 4671-4712.

Vermeulen K, Aerts J-M, Dekock J, Bleyaert P, Berckmans D, Steppe K (2012) Automated leaf temperature monitoring of glasshouse tomato plants by using a leaf energy balance model. Computers and Electronics in Agriculture 87: 19-31.

Pokorska O, Dewulf J, Amelynck C, Schoon N, Simpraga M, Steppe K, Van Langenhove H (2012) Isoprene and terpenoid emissions from Abies alba: identification and emission rates under ambient conditions. Atmospheric Environment 59: 501-508.

Baert A, Villez K, Steppe K (2012) Functional unfold principal component analysis for automatic plant-based stress detection in grapevine. Functional Plant Biology 39(6): 519-530.

Vandegehuchte MW, Steppe K (2012) Interpreting the Heat Field Deformation method: erroneous use of thermal diffusivity and improved correlation between temperature ratio and sap flux density. Agricultural and Forest Meteorology 162-163: 91-97.

Vandegehuchte MW, Steppe K (2012) Comment on “Sap flow measurements by a single thermal dissipation probe: exploring the transient regime” Ann. For. Sci. 66 (2009) by Mahjoub et al. and “Sap flow measurement by a single thermal dissipation probe in transient regime: implementation of the method and test under field conditions” – Ann. For. Sci. 1-9 (2012) by Masmoudi et al. Annals of Forest Science 69(7): 769-771.

Vandegehuchte MW, Braham M, Lemeur R, Steppe K (2012) The importance of sap flow measurements to estimate actual water use of Meski olive trees under different irrigation regimes in Tunisia. Irrigation and Drainage 61(5): 645-656.

Vandegehuchte MW, Steppe K (2012) Improving sap flux density measurements by correctly determining thermal diffusivity, differentiating between bound and unbound water. Tree Physiology 32: 930-942.

Vandegehuchte MW, Steppe K (2012) A triple-probe heat-pulse method for measurement of thermal diffusivity in trees. Agricultural and Forest Meteorology 160: 90-99.

Reyes-Acosta LJ, Vandegehuchte MW, Steppe K, Lubczynski MW (2012) Novel, cyclic heat dissipation method for the correction of natural temperature gradients in sap flow measurements. Part 2. Laboratory validation. Tree Physiology 32: 913-929.

Vandegehuchte MW, Steppe K (2012) Use of the correct heat conduction-convection equation as basis for heat pulse sap flow methods in anisotropic wood. Journal of Experimental Botany 63(8): 2833-2839.

Laffineur Q, Aubinet M, Schoon N, Amelynck C, Müller J-F, Dewulf J, Van Langenhove H, Steppe K, Heinesch B (2012) Abiotic and biotic control of methanol exchanges in a mixed temperate forest. Atmospheric Chemistry and Physics 12: 577-590.

De Schepper V, van Dusschoten D, Copini P, Jahnke S, Steppe K (2012) MRI links stem water content to stem diameter variations in transpiring trees. Journal of Experimental Botany 63: 2645-2653.

Pokorska O, Dewulf J, Amelynck C, Schoon N, Joó E, Simpraga M, Bloemen J, Steppe K, Van Langenhove H (2012) Emissions of biogenic volatile organic compounds from Fraxinus excelsior and Quercus robur under ambient conditions in Flanders (Belgium). International Journal of Environmental Analytical Chemistry 92(15): 1729-1741.

Van Meulebroek L, Vanhaecke L, De Swaef T, Steppe K, De Brabander H (2012) U-HPLC-MS/MS analysis to quantify antioxidants in tomatoes. Journal of Agricultural and Food Chemistry 60: 566-573.

De Swaef T, Verbist K, Cornelis W, Steppe K (2012) Tomato sap flow, stem and fruit growth in relation to water availability in rockwool growing medium. Plant and Soil 350: 237-252.

Steppe K, Cochard H, Lacointe A, AmEglio T (2012) Could rapid diameter changes be facilitated by a variable hydraulic conductance? Plant, Cell & Environment 35: 150-157.

2011

Verbeeck H, Boeckx P, Steppe K (2011) Tropical forests: include Congo basin. Nature 479: 179.

De Schepper V, Vanhaecke L, Steppe K (2011) Localized stem chilling alters carbon processes in the adjacent stem and in source leaves. Tree Physiology 31: 1194-1203.

Simpraga M, Verbeeck H, Demarcke M, Joó E, Pokorska O, Amelynck C, Schoon N, Dewulf J, Van Langenhove H, Heinesch B, Aubinet M, Laffineur Q, Müller J-F, Steppe K (2011) Clear link between drought stress, photosynthesis and biogenic volatile organic compounds in Fagus sylvatica L. Atmospheric Environment 45: 5254-5259.

Joó E, Dewulf J, Amelynck V, Schoon N, Pokorska O, Simpraga M, Steppe K, Aubinet M, Van Langenhove H (2011) Constitutive versus heat and biotic stress induced BVOC emissions in Pseudotsuga menziesii. Atmospheric Environment 45: 3655-3662.

Laffineur Q, Aubinet M, Schoon N, Amelynck C, Müller J-F, Dewulf J, Van Langenhove H, Steppe K, Simpraga M, Heinesch B (2011) Isoprene and monoterpene emissions from a mixed temperate forest. Atmospheric Environment 45: 3157-3168.

De Schepper, Steppe K (2011) Tree girdling responses simulated by a water and carbon transport model. Annals of Botany 6: 1147-1154 (FSPM Special Issue).

Verbeeck H, Peylin P, Bacour C, Steppe K, Ciais P (2011) Seasonal patterns of CO2 fluxes in Amazon forests: fusion of eddy covariance data and the ORCHIDEE model. Journal of Geophysical Research – Biogeosciences 116: G02018.

Van Laere K, Franca SC, Vansteenkiste H, Van Huylenbroeck J, Steppe K, Van Labeke MC (2011) Influence of ploidy level on morphology, growth and drought susceptibility in Spathiphyllum wallisii. Acta Physiologiae Plantarum 33: 1149-1156.

Boussadia O, Steppe K, Zgallai; H, Ben El Hadj S, Braham M, Lemeur R, Van Labeke M-C (2011) Non-destructive determination of nitrogen and chlorophyll content in olive tree leaves and the relation with photosynthesis and fluorescence parameters. Photosynthetica 49: 149-153.

Simpraga M, Verbeeck H, Demarcke M, Joó E, Amelynck C, Schoon N, Dewulf J, Van Langenhove H, Heinesch B, Aubinet M, Müller J-F, Steppe K (2011) Comparing monoterpenoid emissions and net photosynthesis of beech (Fagus sylvatica L.) in controlled and natural conditions. Atmospheric Environment 45: 2922-2928.

Pollet B, Vanhaecke L, Dambre P, Lootens P, Steppe K (2011) Low night temperature acclimation of Phalaenopsis. Plant Cell Reports 30: 1125-1134.

Pollet B, Kromwijk A, Vanhaecke L, Dambre P, Van Labeke MC, Marcelis LFM, Steppe K (2011) A new method to determine the energy saving night temperature for vegetative growth of Phalaenopsis. Annals of Applied Biology 158: 331-345.

Garba M, Cornelis WM, Steppe K (2011) Effect of termite mound material on the physical properties of sandy soil and on the growth characteristics of tomato (Solanum lycopersicum L.) in semi-arid Niger. Plant and Soil 338: 451-466.

2010

Pollet B, Steppe K, Dambre P, Van Labeke M-C, Lemeur R (2010) Seasonal variation of photosynthesis and photosynthetic efficiency in Phalaenopsis. Photosynthetica 48: 580-588.

Saveyn A, Steppe K, Ubierna N, Dawson TE (2010) Woody tissue photosynthesis and its contribution to trunk growth and bud development in young plants. Plant, Cell and Environment 33: 1949-1958.

Demarcke M, Müller J-F, Schoon N, Van Langenhove H, Dewulf J, Joó E, Steppe K, Simpraga M, Heinesch B, Aubinet M, Amelynck C (2010) History effect of light and temperature on monoterpenoid emissions from Fagus sylvatica L. Atmospheric Environment 44: 3261-3268.

Steppe K, De Pauw DJW, Doody TM, Teskey RO (2010) A comparison of sap flux density using thermal dissipation, heat pulse velocity and heat field deformation methods. Agricultural and Forest Meteorology 150: 1046-1056.

Joo E;, Dewulf J, Demarcke M, Amelynck C, Schoon N, Müller J-F, Simpraga M, Steppe K, Van Langenhove H (2010) Quantification of interferences in PTR-MS measurements of monoterpene emissions from Fagus sylvatica L. using simultaneous TD-GC-MS measurements. International Journal of Mass Spectrometry 291: 90-95.

De Schepper V, Steppe K (2010) Development and verification of a water and sugar transport model using measured stem diameter variations. Journal of Experimental Botany 61: 2083-2099.

De Schepper V, Steppe K, Van Labeke M-C, Lemeur R (2010) Detailed analysis of double girdling effects on stem diameter variations and sap flow in young oak trees. Environmental and Experimental Botany 68: 149-156.

De Swaef T, Steppe K (2010) Linking stem diameter variations to sap flow, turgor and water potential in tomato. Functional Plant Biology 37: 429-438.

Boussadia O, Steppe K, Zgallai H, Ben El Hadj S, Braham M, Lemeur R, Van Labeke M-C (2010) Effects of nitrogen deficiency on leaf photosynthesis, carbohydrate status and biomass production in two olive cultivars ‘Meski’ and ‘Koroneiki’. Scientia Horticulturae 123: 336-342.

Joó E, Van Langenhove H, Simpraga M,Steppe K, Amelynck C, Schoon N, Müller J-F, Dewulf J (2010) Variation in biogenic volatile organic compound emission pattern of Fagus sylvatica L. due to aphid infection. Atmospheric Environment 44: 227-234.

2009

Nadezhdina N, Steppe K, De Pauw DJW, Bequet R, Cermak J, Ceulemans R (2009) Stem-mediated hydraulic redistribution in large roots on opposing sides of a Douglas-fir tree following localized irrigation. New Phytologist 184: 932-943.

Steppe K, Zeugin F, Zweifel R (2009) Low-decibel ultrasonic acoustic emissions are temperature-induced and probably have no biotic origin. New Phytologist 183: 928-931.

Pollet B, Steppe K, Van Labeke M-C, Lemeur R (2009) Diurnal cycle of chlorophyll fluorescence in Phalaenopsis. Photosynthetica 47: 309-312.

Villez K, Steppe K, De Pauw DJW (2009) Use of unfold-PCA for on-line plant stress monitoring and sensor failure detection. Biosystems Engineering 103: 23-34.

De Swaef T, Steppe K, Lemeur R (2009) Determining reference values for stem water potential and maximum daily trunk shrinkage in young apple trees based on plant responses to water deficit. Agricultural Water Management 96: 541-550.

Pollet B, Steppe K, Dambre P, Van Labeke M-C, Lemeur R (2009) Temperature integration of Hedera helix L.: quality aspects and growth response. Scientia Horticulturae 120: 89-95.

Lemeur R, Fernandez E, Steppe K (2009) Symbols, SI units and physical quantities within the scope of sap flow studies. Acta Horticulturae 846: 21-32.

Steppe K, De Pauw DJW, Saveyn A, Tahon P, Nadezhdina N, Cermak J, Lemeur R (2009) Radial sap flux profiles and beyond: an easy software analysis tool. Acta Horticulturae 846: 85-92.

Fernandez JE, Chartzoulakis K, Grant OM, Lemeur R, Steppe K, Marsal J, Xiloyannis C (2009) Water shortage and efficient water use in horticulture. Acta Horticulturae 817: 363-366.

2008

Saveyn A, Steppe K, Lemeur R (2008) Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate. Botany (formerly Canadian Journal of Botany) 86: 1440-1448.

Razavi F, Pollet B, Steppe K, Van Labeke MC (2008) Chlorophyll fluorescence as a tool for evaluation of drought stress in strawberry. Photosynthetica 46: 631-633.

Steppe K, De Pauw DJW, Lemeur R (2008) Validation of a dynamic stem diameter variation model and the resulting seasonal changes in calibrated parameter values. Ecological Modelling 218: 247-259.

De Pauw DJW, Steppe K, De Baets B (2008) Unravelling the output uncertainty of a tree water flow and storage model using several global sensitivity analysis methods. Biosystems Engineering 101: 87-99.

Deckmyn G, Verbeeck H, Op de Beeck M, Vansteenkiste D, Steppe K, Ceulemans R (2008) ANAFORE: a stand-scale process-based forest model that includes wood tissue development and labile carbon storage in trees. Ecological Modelling 215: 345-368.

Steppe K, De Pauw DJW, Lemeur R (2008) A step towards new irrigation scheduling strategies using plant-based measurements and mathematical modelling. Irrigation Science 26: 505-517.

Saveyn A, Steppe K, Lemeur R (2008) Report on non-temperature related variations in CO2 efflux rates from young tree stems in the dormant season. Trees-Structure and function 22: 165-174.

De Pauw DJW, Steppe K, De Baets B (2008) Identifiability analysis and improvement of a tree water flow and storage model. Mathematical Biosciences 211: 314-332.

Saveyn A, Steppe K, McGuire MA, Lemeur R, Teskey RO (2008) Stem respiration and carbon dioxide efflux of young Populus deltoides trees in relation to temperature and xylem carbon dioxide concentration. Oecologia 154: 637-649.

Teskey RO, Saveyn A, Steppe K, McGuire MA (2008) Origin, fate and significance of CO2 in tree stems. New Phytologist 177: 17-32 (invited review).

Dzikiti S, Steppe K, Lemeur R, Milford JR (2008) Modelling the water transport dynamics in young navel orange trees budded on rootstocks commonly grown in northern Zimbabwe. Acta Horticulturae 803: 259-264.

Pollet B, Steppe K, Dambre P, Van Labeke MC, Lemeur R (2008) Growth response of Hedera helix L. to temperature integration. Acta Horticulturae 801: 1387-1392.

Vermeulen K, Steppe K, Linh NS, De Backer L, Bleyaert P, Dekock J, Aerts JM, Berckmans D, Lemeur R (2008) Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress. Acta Horticulturae 801: 1259-1266.

Dzikiti S, Steppe K, Lemeur R (2008) Partial rootzone drying of drip irrigated ‘Navel’ orange trees [Citrus sinensis (L.) Osbeck] under semi-arid tropical conditions. Acta Horticulturae 792: 249-256.

Steppe K, De Pauw DJW, Lemeur R (2008) A novel methodology for irrigation scheduling using plant-based measurements and mathematical modelling. Acta Horticulturae 792: 631-638.

2007

Aerts J-M, Steppe K, Boonen C, Lemeur R, Berckmans D (2007) Simulation of sap flow in a beech tree by means of a dynamic data-based model as influenced by a solar eclipse. Biosystems Engineering 98: 446-454.

Verbeeck H, Steppe K, Nadezhdina N, Op De Beeck M, Deckmyn G, Meiresonne L, Lemeur R, Cermak J, Ceulemans R, Janssens IA (2007) Model analysis of the effects of atmospheric drivers on storage water use in Scots pine. Biogeosciences 4: 657-671.

Steppe K, Saveyn A, McGuire MA, Lemeur R, Teskey RO (2007) Resistance to radial CO2 diffusion contributes to between-tree variation in CO2 efflux rates of Populus deltoides stems. Functional Plant Biology 34: 785-792.

Zweifel R, Steppe K, Sterck F (2007) Stomatal regulation by microclimate and tree water relations – interpreting ecophysiological field data with a hydraulic plant model. Journal of Experimental Botany 58: 2113-2131.

Verbeeck H, Steppe K, Nadezhdina N, Op De Beeck M, Deckmyn G, Meiresonne L, Lemeur R, Cermak J, Ceulemans R, Janssens IA (2007) Stored water use and transpiration in Scots pine: a modeling analysis with ANAFORE. Tree Physiology 27: 1671-1685.

Dzikiti S, Steppe K, Lemeur R., Milford JR (2007) Whole-tree level water balance and its implications on stomatal oscillations in orange trees [Citrus sinensis (L.) Osbeck] under natural climatic conditions. Journal of Experimental Botany 58: 1893-1901.

Vermeulen K, Steppe K, Janssen K, Bleyaert P, Dekock J, Aerts JM, Berckmans D, Lemeur R (2007) Solutions to overcome pitfalls of two automated systems for direct measurement of greenhouse tomato water uptake. HortTechnology 17: 220-226.

Saveyn A, Steppe K, Lemeur R (2007) Daytime depression in tree stem CO2 efflux rates: is it caused by low stem turgor pressure? Annals of Botany 99: 477-485.

Saveyn A, Steppe K, Lemeur R (2007) Drought and the diurnal patterns of stem CO2 efflux and xylem CO2 concentration in young oak (Quercus robur). Tree Physiology 27: 365-374.

Steppe K, Lemeur R (2007) Effects of ring-porous and diffuse-porous stem wood anatomy on the hydraulic parameters used in a water flow and storage model. Tree Physiology 27: 43-52.

2006

Zgallai; H, Steppe K, Lemeur R (2006) Effect of severe water stress on partitioning of 14C-assimilates in tomato plants. Journal of Applied Botany and Food Quality – Angewandte Botanik, 80: 88-92.

Steppe K, Dzikiti S, Lemeur R, Milford JR (2006) Stomatal oscillations in orange trees under natural climatic conditions. Annals of Botany 97: 831-835.

Zgallai; H, Steppe K, Lemeur R (2006) Effects of different levels of water stress on leaf water potential, stomatal resistance, protein and chlorophyll content and certain antioxidative enzymes in tomato plants. Journal of Integrative Plant Biology 48: 679-685.

Steppe K, De Pauw DJW, Lemeur R, Vanrolleghem PA (2006) A mathematical model linking tree sap flow dynamics to daily stem diameter fluctuations and radial stem growth. Tree Physiology 26: 257-273.

Dekock J, Aerts J-M, Vermeulen K, Steppe K, Lemeur R, Janssen K, Bleyaert P, Westra J, Rieswijk T, Berckmans D (2006) Crop monitoring by means of an on-line early warning system. Acta Horticulturae 718: 183-188.

Steppe K, Saveyn A, Vermeulen K, Lemeur R (2006) A comprehensive model for simulation of stem diameter fluctuations and radial stem growth. Acta Horticulturae 718 35-42.

Dzikiti S, Steppe K, Lemeur R, Milford JR (2006) Water use by navel orange trees (Citrus sinensis (L.) Osbeck) in Zimbabwe. Acta Horticulturae 707: 135-141.

2005

Zgallaï; H, Steppe K, Lemeur R (2005) Photosynthetic, physiological and biochemical responses of tomato plants to polyethylene glycol-induced water deficit. Journal of Integrative Plant Biology (formerly Acta Botanica Sinica) 47: 1470-1478.

Steppe K, Lemeur R, Dierick D (2005) Unravelling the relationship between stem temperature and air temperature to correct for errors in sap-flow calculations using stem heat balance sensors. Functional Plant Biology 32: 599-609.

2004

Steppe K, Cnudde V, Girard C, Lemeur R, Cnudde JP, Jacobs P (2004) Use of X-ray computed microtomography for non-invasive determination of wood anatomical characteristics. Journal of Structural Biology 148: 11-21.

Steppe K, Lemeur R (2004) An experimental system for analysis of the dynamic sap-flow characteristics in young trees: results of a beech tree. Functional Plant Biology 31: 83-92.

2002

Steppe K, Lemeur R, Samson R (2002) Sap flow dynamics of a beech tree during the solar eclipse of 11 August 1999. Agricultural and Forest Meteorology 112: 139-149.