Janusz Zwiazek

Professor. Plant physiology

Phone: 780-492-2358
Email: janusz.zwiazek@ualberta.ca
Department: Renewable Resources
Office: 4-38 Earth Sciences
Office Hours: By appointment
Address: University of Alberta
4-38 Earth Sciences
Edmonton, AB
Canada T6G 2E3

Job/Research Area: Tree physiology

Major Responsibilities/Research Interests: Tree physiology; effects of pollution, drought and other environmental stresses on function and structure of trees; stress resistance, physiological, biochemical and structural adaptations of trees to stress; tree improvement and stress conditioning; structure and function of cell membranes.

Dr Zwiazek is a participant in the Land Reclamation International Graduate School (LRIGS) program sponsored by NSERC CREATE. 

University of Alberta Libraries Education and Research Archive - Collections in Department of Renewable Resources 

Selected Publications

Arango-Velez A, Zwiazek J.J., Thomas B.R., Tyree M.T. 2011. Xylem cavitation and leaf water relations of poplar clones with different drought resistance strategies. Physiologia Plantarum 143: 154-165 (impact factor 3.07).


Calvo-Polanco M, Zwiazek J.J. 2011. Role of osmotic stress in ion accumulation and physiological responses of mycorrhizal white spruce (Picea mariana) and jack pine (Pinus banksiana) seedlings exposed to soil fluoride and NaCl. Acta Physiologiae Plantarum 33:1365–1373 (impact factor 1.34).


Lehto T., Zwiazek J.J. 2011. Ectomycorrhizas and water relations of trees: a review. Mycorrhiza 21: 71-90 (impact factor 2.57).


Siemens, J.A., Calvo-Polanco M., Zwiazek. J.J. 2011. Hebeloma crustuliniforme facilitates ammonium and nitrate assimilation in trembling aspen (Populus temuloides) seedlings. Tree Physiology 31:1238-1250 (impact factor 2.40).


Siemens J.A., Zwiazek J.J. 2011. Hebeloma crustuliniforme modifies root hydraulic responses of trembling aspen (Populus tremuloides) seedlings to changes in external pH. Plant and Soil 345:247-256 (impact factor 2.77).


Voicu M.C., Zwiazek J.J. 2011. Diurnal and seasonal changes of leaf lamina hydraulic conductance in bur oak (Quercus macrocarpa) and trembling aspen (Populus tremuloides). Trees - Structure and Function 25: 485-495 (impact factor 1.45).

Calvo Polanco, M; Jones, MD; Zwiazek, JJ. 2009. Effects of pH on NaCl resistance of American elm (Ulmus americana) seedlings inoculated with Hebeloma crustuliniforme and Laccaria bicolor. Acta Physiologiae Plantarum 31: 515-522.

Calvo Polanco, M; Zwiazek JJ; Jones, MD; MacKinnon, MD. 2009. Effects of NaCl on responses of ectomycorrhizal black spruce (Picea mariana), white spruce (Picea glauca) and jack pine (Pinus banksiana) to fluoride. Physiologia Plantarum 135: 51-61.

Lee SH; Chung, GC; Zwiazek, JJ. 2009. Light decreases cell hydraulic conductivity and turgor pressure in bundle sheath cells of tobacco (Nicotiana tabacum) leaves. Plant Science 176: 248-255.

Voicu, MC; Cooke, JK; Zwiazek, JJ. 2009. Aquaporin gene expression and apoplastic water flow in bur oak (Quercus macrocarpa) leaves in relation to the light response of leaf hydraulic conductance. Journal of Experimental Botany 60: 4063-4075.

Siemens, J.A. & Zwiazek, J.J.. 2003. Effects of water deficit stress and recovery on the root water relations of trembling aspen (Populus tremuloides) seedlings. Plant Science 165:113-120.

Redfield, E., Croser, C., Zwiazek, J.J., MacKinnon, M.D. & Qualizza, C.. 2003. Responses of red-osier dogwood (Cornus stolonifera) to oil sands tailings treated with gypsum and alum. Journal of Environmental Quality 32:1008-1014.

Islam, A., Macdonald, S.E. & Zwiazek, J.J.. 2003. Responses of black spruce (Picea mariana) and tamarack (Larix laricina) to flooding and ethylene treatments. Tree Physiology 23:535-542.

Apostol, K.G. & Zwiazek, J.J.. 2003. Hypoxia affects root sodium and chloride concentrations and inhibits water conductance in salt-treated jack pine (Pinus banksiana) seedlings. Trees: Structure and Function 17:251-257.

Kamaluddin, M. & Zwiazek, J.J.. 2003. Fluoride inhibits root water flow and affects leaf expansion and gas exchange in aspen (Populus tremuloides) seedlings. Physiologia Plantarum 117:368-375.


  • REN R 321: Tree Physiology
  • REN R 421: Advanced Tree Physiology