Faculty of Biology

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Dr. rer. nat. Christiane Wittmann

Fakultät Biologie, Botanischer Garten

Address
Universitätsstr. 5
45141 Essen
Room
S05 V04 F09
Phone
+49 201 183 3122
E-Mail
christiane.wittmann@uni-due.de
Website
https://www.uni-due.de/botanischer-garten/
Office hours
Di. 10-11 Uhr

Functions

  • Leiterin, Botanischer Garten

  • Leiterin, Botanischer Garten

The following publications are listed in the online university bibliography of the University of Duisburg-Essen. Further information may also be found on the person's personal web pages.

    Journal articles

  • Salomon, Roberto L; Helm, Juliane; Gessler, Arthur; Grams, Thorsten E. E; Hilman, Boaz; Muhr, Jan; Steppe, Kathy; Wittmann, Christiane; Hartmann, Henrik
    The quandary of sources and sinks of CO₂efflux in tree stems-new insights and future directions
    In: Tree Physiology, Vol. 44, 2024, Nr. 1, tpad157
    DOI
  • Wittmann, Christiane; Kelsch, Barbara; Reßing, Franziska; Pfanz, Hardy
    Can stress turn trees hair white? : Hair covering of stems improves resilience of corticular photosynthesis against heat-stress
    In: Theoretical and Experimental Plant Physiology, Vol. 33, 2021, Nr. 2, pp. 157 – 172
    DOI (Open Access)
  • Pfanz, Hardy; Saßmannshausen, Frank; Wittmann, Christiane; Pfanz, Benny; Thomalla, Annika
    Mofette vegetation as an indicator for geogenic CO₂ emission : a case study on the banks of the Laacher See Volcano, Vulkaneifel, Germany
    In: Geofluids, Vol. 2019, 2019, 9589306
    DOI (Open Access)
  • Vodnik, Dominik; Thomalla, Annika; Ferlan, Mitjo; Levanič, Tom; Eler, Klemen; Ogrinc, Nives; Wittmann, Christiane; Pfanz, Hardy
    Atmospheric and geogenic CO₂ within the crown and root of spruce (Picea abies L. Karst.) growing in a mofette area
    In: Atmospheric Environment, Vol. 182, 2018, pp. 286 – 295
    DOI
  • Wittmann, Christiane; Pfanz, Hardy
    More than just CO₂-recycling : Corticular photosynthesis as a mechanism to reduce the risk of an energy crisis induced by low oxygen
    In: New Phytologist, Vol. 219, 2018, Nr. 2, pp. 551 – 564
    DOI (Open Access)
  • Pilz, Maria; Hohberg, Karin; Pfanz, Hardy; Wittmann, Christiane; Xylander, Willi E.R.
    Respiratory adaptations to a combination of oxygen deprivation and extreme carbon dioxide concentration in nematodes
    In: Respiratory Physiology and Neurobiology, Vol. 239, 2017, pp. 34 – 40
    DOI
  • Wittmann, Christiane; Pfanz, Hardy
    The optical, absorptive and chlorophyll fluorescence properties of young stems of five woody species
    In: Environmental and Experimental Botany, Vol. 121, 2016, pp. 83 – 93
    DOI
  • Pfanz, Hardy; Mombour, Janne; Wittmann, Christiane; Fleischmann, Frank; Oßwald, Wolgang
    Chlorophyll fluorescence for visualizing the spatial and temporal spread of Phytophthora alni subsp. alni in alder bark tissue
    In: Plant Pathology, Vol. 64, 2015, Nr. 2, pp. 467 – 477
    DOI
  • Wittmann, Christiane; Pfanz, Hardy
    Bark and woody tissue photosynthesis : a means to avoid hypoxia or anoxia in developing stem tissues
    In: Functional Plant Biology, Vol. 41, 2014, Nr. 9, pp. 940 – 953
    DOI
  • Lüttge, Ulrich; Escher, P.; Paluch, R.; Pfanz, Hardy; Wittmann, Christiane; Rennenberg, Heinz; Rakowski, Krzysztof
    Variability of photosynthetic capacity and water relations of Pinus sylvestris L. in the field
    In: Biologia Plantarum, Vol. 55, 2011, Nr. 1, pp. 90 – 98
    DOI
  • Wittmann, Christiane; Pfanz, Hardy
    Antitranspirant functions of stem periderms and their influence on corticular photosynthesis under drought stress.
    In: Trees, 2008, Nr. 22, pp. 187 – 196
  • Wittmann, Christiane; Pfanz, Hardy
    General trait relationships in stems: a study on the performance and interrelationships of several functional and structural parameters involved in corticular photosynthesis
    In: Physiologia Plantarum, 2008, Nr. 134, pp. 636 – 648
  • Wittmann, Christiane; Humar, M.; Matyssek, R.; Pfanz, Hardy
    Effects of ozone impact on the gas exchange and chlorophyll fluorescence of juvenile birch stems (Betula pendula Roth.)
    In: Environmental Pollution, Vol. 150, 2007, Nr. 2, pp. 258 – 266
    DOI
  • Pfanz, Hardy; Vodnik, D.; Wittmann, Christiane; Aschan, Guido; Batic, F.; Turk, B.; Macek, I.
    Photosynthetic performance (CO2-compensation point, carboxylation efficiency, and net photosynthesis) of timothy grass (Phleum pratense L.) is affected by elevated carbon dioxide in post-volcanic mofette areas.
    In: Environmental and Experimental Botany, 2007
  • Wittmann, Christiane; Pfanz, Hardy
    Temperature-dependency of bark photosynthesis in beech (Fagus sylvatica L.) and birch (Betula pendula Roth.) trees
    In: Journal of Experimental Botany (JEB), Vol. 58, 2007, Nr. 15-16, pp. 4293 – 4306
    DOI (Open Access)
  • Pfanz, Hardy; Flohr, S.; Wittmann, Christiane
    Das Staubfangvermögen von Vegetation : Grundlagen und erste Ergebnisse aus der Praxis
    In: Taspo, Vol. 3, 2006, pp. 12 – 15
  • Wittmann, Christiane; Pfanz, Hardy; Loreto, F.; Centritto, M.; Pietrini, F.; Alessio, G.
    Stem CO2 release under illumination: corticular photosyntersis, photorespiration or inhibition of mitochondrial respiration?
    In: (PCE), Vol. 29, 2006, pp. 1149 – 1158
  • Pfanz, Hardy; Aschan, Guido; Kerkien, B.; Lomsky, B.; Wittmann, Christiane
    Inhibition of leaf and twig photosynthesis of Fagus sylvatica by air pollutants.
    In: Journal of Agricultural Meteorology, Vol. 60, 2005, Nr. 6, pp. 1193 – 1195
  • Wittmann, Christiane; Pfanz, Hardy; Pietrini, F.
    Light-modulation of corticular CO2-refixation in young birch stems (Betula pendula Roth.).
    In: Phyton, Vol. 45, 2005, pp. 195 – 212
  • Pfanz, Hardy; Vodnik, D.; Wittmann, Christiane; Aschan, Guido; Raschi, A.
    Plants and geothermal CO2 exhalations – survival in and adaptation to a high CO2 environment.
    In: Progress in Botany, Vol. 65, 2004, pp. 499 – 538
  • Wittmann, Christiane; Pfanz, Hardy
    Light –modulation of bark photosynthesis in birch (Betula pendula).
    In: (Acta Biol Slo), Vol. 46, 2003, Nr. 2, pp. 49 – 54
  • Pfanz, Hardy; Aschan, Guido; Langenfeld-Heyser, R.; Wittmann, Christiane; Loose, M.
    Ecology and ecophysiology of tree stem photosynthesis: corticular and wood photosynthesis
    In: Naturwissenschaften, Vol. 89, 2002, pp. 147 – 162
  • Vodnik, D.; Pfanz, Hardy; Wittmann, Christiane; Macek, I.; Kastelec, D.; Turk, B.; Batic, F.
    Photosynthetic acclimation in plants growing near a carbon dioxide spring.
    In: Phyton, Vol. 42, 2002, pp. 239 – 244
  • Aschan, Guido; Wittmann, Christiane; Pfanz, Hardy
    Age-dependent bark photosynthesis of aspen twigs.
    In: Trees, Vol. 15, 2001, pp. 431 – 437
  • Wittmann, Christiane; Aschan, Guido; Pfanz, Hardy
    Leaf and twig photosynthesis of young beech (Fagus sylvatica) and aspen (Populus tremula) trees grown under different light intensity regimes
    In: Basic and Applied Ecology, Vol. 2, 2001, Nr. 2, pp. 145 – 154
    DOI
  • Feige, Sebastian; Wiegand, Jens; Schreiber, Ulrich C.; Wieditz, Katja; Wittmann, Christiane; Xiarong, Luo
    Radon and Thoron in Cave Dwellings
    In: Health physics, Vol. 78, 2000, Nr. 4, pp. 438 – 444

    • Book articles / Proceedings papers

  • Wittmann, Christiane
    Was sind Heilpflanzen und Kräuter?
    In: Kräuter und Eulen, Lernaufgaben für eine Biologie-AG / Sandmann, Angela; Wenning, Silvia (Eds.). Norderstedt: Books on Demand, 2015, pp. 6
  • Kubinski, H.; Kubinski, F.; Wittmann, Christiane
    "Liberty Cap" und "Magic Mushrooms" - halluzinogene Pilze
    In: Pilze: Lernaufgaben für den Biologieunterricht / Sandmann, Angela; Wenning, Silvia (Eds.). Norderstedt: Books on Demand, 2014, pp. 17 – 21
    Online Full Text
  • Kubinski, H.; Kubinski, F.; Wittmann, Christiane
    Eine neue Pilzart - Der Heizpilz
    In: Pilze: Lernaufgaben für den Biologieunterricht / Sandmann, Angela; Wenning, Silvia (Eds.). Norderstedt: Books on Demand, 2014, pp. 22 – 24
    Online Full Text
  • Pfanz, Hardy; Kerkien, B.; Wittmann, Christiane; Lomsky, B.; Aschan, Guido
    Air pollutant effects to leaf, bark and wood photosynthesis of trembling aspen (Populus tremula L.)
    In: Proceedings of the IUFRO Meeting “Forests under changing climate, enhanced UV and air pollution" / 21th RG meeting Forests Under Changing Climate, Enhanced UV And Air Pollution, August 25-30, 2004, in Oulu, Finland / Huttunen, Satu (Eds.). Amsterdam: Elsevier, 2005, pp. 102 – 108
  • Vodnik, D.; Turk, B.; Pfanz, Hardy; Batic, F.; Wittmann, Christiane; Kaligaric, M.; Zupan, G.
    Rast in delovanje rastlin pri povecanih koncentracijah oglikovega dioksida ob naravnih virih CO2
    In: Proceedings of the Slovenian Congress on elevated CO2 / Komac, M. (Eds.). Ljubljana: Varstvo zraka v Sloveniji., 2001, pp. 205 – 211
  • Pfanz, Hardy; Aschan, Guido; Wittmann, Christiane
    Bark photosynthesis : fact not fiction
    In: Trees – L`Arbre 2002 / Labrecque, M. (Eds.). Montreal: Isabell Quentin Publ., 2000, pp. 117 – 121
  • Pfanz, Hardy; Grau, K.; Wittmann, Christiane; Zelgert, W.
    Do land snails prefer specific sulfur compounds?
    In: Sulfur nutrition and sulfur assimilation in higher plants: molecular, biochemical and physiological aspects / Brunold, Christian; Rennenberg, H.; De Kok, L.J.; Stulen, I.; Davidian, J.C. (Eds.). Bern: Haupt, 2000, pp. 425 – 427

    • Thesis

  • Wittmann, Christiane
    CO 2-Refixierung im Cortex von Laubbäumen und ihre Beeinflussung durch abiotische Umweltfaktoren
    Duisburg-Essen, 2005
    Online Full Text, Online Full Text

    • Lectures

  • Wittmann, Christiane
    CO2-Recycling in Holzgewächsen : Wie Bäume ihre Klimabilanz optimieren
    Die kleine Form, 31. Oktober 2018, Essen,
    2018(Die kleine Form 2018/2019)
    Online Full Text, Online Full Text (Open Access)