Sonia Gazzarrini

Associate Professor
Ph.D., Eberhard Karls University of Tuebingen, 2000
Cell & Systems Biology
Research Areas: 
Molecular Biology & Biotechnology, Cell & Developmental Biology, Functional Genomics & Genetics, Plant Biology
Graduate Programs: 
Cell & Systems Biology
Office phone: 
Lab phone: 
SY 222
SY 215

gazzarrini (at)utsc [dot] utoronto [dot] ca


Department of Biological Sciences
University of Toronto at Scarborough
1265 Military Trail
Toronto, Ontario
Canada M1C 1A4


We use functional genomic, molecular and cellular approaches to study seed development and germination in plants and the role that hormones play in this processes. We are also interested in the molecular mechanisms regulating plant resistance to abiotic (temperature, water) stresses.

Currently, we are characterizing protein complexes important for the regulation of these processes identified by yeast-two-hybrid and Bimolecular Fluorescence Complementation (BiFC) assays in the model plant Arabidopsis. We are also studying transcriptional and post-translational regulation of master regulators of seed development and germination in response to abiotic stresses.

Accepting Graduate students and BIOD98/99 for 2014.


Tsai, A.Y., Gazzarrini, S. (2014).  Trehalose-6-phosphate and SnRK1 kinases in plant development and signaling: the emerging picture.. Frontiers in Plant Science. 5(119),  Abstract
Tsai, A.Y., Gazzarrini, S. (2012).  AKIN10 and FUSCA3 interact to control lateral organ development and phase transitions in Arabidopsis. The Plant Journal. 69(5), 809–82. Abstract
Lumba, S., Tsuchiya, Y., Delmas, F., Hezky, J., Provart, N.J., Lu, Q.S., McCourt, P., Gazzarrini, S. (2012).  The embryonic leaf identity gene FUSCA3 regulates vegetative phase transitions by negatively modulating ethylene-regulated gene expression in Arabidopsis. BMC Biology. 10, 8. Abstract
Chiu, R.S., Nahal, H., Provart, N.J., Gazzarrini, S. (2012).  The role of the Arabidopsis FUSCA3 transcription factor during inhibition of seed germination at high temperature. BMC Plant Biology. 12, 15. Abstract
Tsai, A.Y., Gazzarrini, S. (2012).  Overlapping and distinct roles of AKIN10 and FUSCA3 in ABA and sugar signalling during seed germination. Plant Signaling & Behavior. 7(10), 1238-1242. Abstract
Lu, Q.S., Dela Paz, J., Pathmanathan, A., Chiu, R.S., Tsai, A.Y.-L., Gazzarrini, S. (2010).  The C-terminal domain of FUSCA3 negatively regulates mRNA and protein levels, and mediates sensitivity to the hormones abscisic acid and gibberellic acid in Arabidopsis. The Plant Journal. 64(1), 100-113. Abstract
Loque, D., Yuan, L., Kojima, S., Gojon, A., Wirth, J., Gazzarrini, S., Ishiyama, K., Takahashi, H., von Wiren, N. (2006).  Additive contribution of AMT1;1 and AMT1;3 to high-affinity ammonium uptake across the plasma membrane of nitrogen-deficient Arabidopsis roots.. The Plant Journal. 48, 522-534. Abstract
McCourt, P., Lumba, S., Tsuchiya, Y., Gazzarrini, S. (2005).  Crosstalk and abscisic acid: the roles of terpenoid hormones in coordinating development.. Physiologia Plantarum.. 123, 147-152. Abstract
Gazzarrini, S., Tsuchiya, Y., Lumba, S., Okamoto, M., McCourt, P. (2004).  The transcription factor FUSCA3 controls developmental timing in Arabidopsis through the hormones gibberellin and abscisic acid.. Dev. Cell.. 7, 373-85. Abstract
Gazzarrini, S., McCourt, P. (2003).  Cross-talk in plant hormone signalling: what Arabidopsis mutants are telling us. Ann. Bot. (London). 91, 605-12.. Abstract
Gazzarrini, S., McCourt, P. (2001).  Genetic interactions between ABA, ethylene and sugar signaling pathways.. Curr Opin Plant Biol.. 4, 387-91. Abstract
von Wiren, N., Gazzarrini, S., Gojon, A., Frommer, W. (2000).  The molecular physiology of ammonium uptake and retrieval.. Curr Opin Plant Biol.. 3, 254-61.. Abstract
Gazzarrini, S., Lejay, L., Gojon, A., Ninnemann, O., Frommer, W., von Wiren, N. (1999).  Three functional transporters for constitutive, diurnally regulated, and starvation-induced uptake of ammonium into Arabidopsis roots.. Plant Cell.. 11, 937-948. Abstract
Venegoni, A., Moroni, A., Gazzarrini, S., Marre, M. (1997).  Ammonium and methylammonium transport in Egeria densa leaves in conditions of different H+ pump activity.. BOTANICA ACTA. 110, 369-377. Abstract
von Wiren, N., Gazzarrini, S., Frommer, W. (1997).  Regulation of mineral nitrogen uptake in plants.. Plant and Soil. 196, 191-199.. Abstract