Stephen Strelkov

Professor, Faculty of Agricultural, Life and Environmental Sci - Ag, Food & Nutri Sci Dept

Contact

Professor, Faculty of Agricultural, Life and Environmental Sci - Ag, Food & Nutri Sci Dept
Email
stephen.strelkov@ualberta.ca
Phone
(780) 492-1969
Address
4-16E Agriculture/Forestry Centre
9011 - 116 St NW
Edmonton AB
T6G 2P5

Overview

About

Degree

PhD, University of Manitoba

Job/Research Area

Plant Pathology and Associate Chair (Grad Programs)


Research

Major Responsibilities/Research Interests

My main research interests are in the area of host-parasite interactions, particularly in the role of host-specific toxins in fungal pathogenicity and plant disease development. Our work has focused on the purification, characterization and mode of action of Ptr ToxB, a host-specific toxin produced by Pyrenophora tritici-repentis, the causal agent of tan spot of wheat. We have recently also began exploring the basic pathogenic ability of virulent and avirulent isolates of the pathogen, and its relationship to toxin production. Furthermore, since my arrival at the University of Alberta, my interests have expanded beyond the tan spot pathosystem to include a number of other areas in plant pathology. Of particular importance has been our work on clubroot of crucifers, caused by Plasmodiophora brassicae, which is an emerging disease of canola in Alberta. Given the recent occurrence of this disease in the province, the scope of our research on clubroot has ranged from the basic to the applied. We have examined questions related to pathotype composition and diversity in populations of the pathogen from Alberta and throughout Canada, and have initiated work on molecular changes induced in susceptible canola genotypes in response to infection. In addition, we have started field research aimed at developing an integrated management strategy for control of clubroot on canola. This latter component of the work is closely related to a third area of recent interest, the development of integrated management strategies for dealing with root diseases of field crops in general. In order to strengthen and complement our research capabilities, I have established collaborations with a number of researchers at this University and at other institutions, both at the provincial and national level.

Courses

AFNS 500 - Individual Study

Project or reading course under the supervision of a Faculty member requiring preparation of a comprehensive report. Prerequisite: consent of Department. Note: May be taken more than once provided the topic is different.

Fall Term 2020
AFNS 582 - Diseases of Field and Horticultural Crops

Diseases of cereal, oilseed, pulse, forage, vegetable, fruit, and ornamental crops. Normally offered in alternate years. Not to be taken if credit received for PL SC 481. Prerequisite: PL SC 380 or consent of instructor.

Winter Term 2021
AFNS 602 - Graduate Reading Project

Individual study. Critical reviews of selected literature under the direction of a Faculty member. Note: May be taken more than once if the topic is different. Prerequisite: consent of Department.

Fall Term 2020
PL SC 380 - Principles of Plant Pathology

An introduction to plant diseases; the nature of nonparasitic and parasitic causal agents such as air pollutants, temperature, viruses, bacteria, fungi, higher plants and nematodes; principles involved in disease prevention and control. Prerequisite: BIOL 107 recommended.

Fall Term 2020
PL SC 481 - Diseases of Field and Horticultural Crops

Diseases of cereal, oilseed, pulse, forage, vegetable, fruit and ornamental crops. Normally offered in alternate years. Prerequisite: PL SC 380.

Winter Term 2021

Browse more courses taught by Stephen Strelkov

Publications

Direct evidence of surface infestation of seeds and tubers by Plasmodiophora brassicae and quantification of spore loads
Author(s): Rennie, D.C., Manolii, V.P., Cao, T., Hwang, S.F., Howard, R.J., and Strelkov, S.E.
Publication Date: 2011
Publication: Plant Pathol.
Volume: 60
Page Numbers: 811-819

Influence of cultivar resistance and inoculum density on root hair infection of canola (Brassica napus) by Plasmodiophora brassicae
Author(s): Hwang, S.F., Ahmed, H.U., Q. Zhou, Strelkov, S.E., Gossen, B.D., Peng, G., and Turnbull, G.D.
Publication Date: 2011
Publication: Plant Pathol.
Volume: 60
Page Numbers: 820-829

Progress towards the sustainable risk management of clubroot [Plasmodiophora brassicae] of canola on the Canadian prairies
Author(s): Strelkov, S.E., Hwang, S.F., Howard, R.J., Hartman, M., and Turkington, T.K. 2011
Publication Date: 2011
Publication: Prairie Soils and Crops,
Volume: 4
Page Numbers: 114-121

Simple sequence repeats and diversity of globally distributed populations of Pyrenophora tritici-repentis
Author(s): Abboukhaddour, R., Cloutier, S., Lamari, L., and Strelkov, S.E.
Publication Date: 2011
Publication: Can. J. Plant Pathol.
Volume: 33
Page Numbers: 389-399

Influence of carbon source on growth and mycotoxin production by isolates of Pyrenophora tritici-repentis from wheat
Author(s): Bouras, N., and Strelkov, S.E.
Publication Date: 2010
Publication: Can. J. Microbiol.
Volume: 56
Page Numbers: 874-882

Inhibition of photosynthesis and modification of the wheat leaf proteome by Ptr ToxB: a host-specific toxin from the fungal pathogen Pyrenophora tritici-repentis
Author(s): Kim, Y.M., Bouras, N., Kav, N.N.V., and Strelkov, S.E.
Publication Date: 2010
Publication: Proteomics
Volume: 10
Page Numbers: 2911-2926

Molecular characterization of a serine protease Pro1 from Plasmodiophora brassicae that stimulates resting spore germination
Author(s): Feng, J., Hwang, R., Hwang, S.F., Strelkov, S.E., Gossen, B.D., Zhou, Q.X., and Peng, G.
Publication Date: 2010
Publication: Mol. Plant Pathol.
Volume: 11
Page Numbers: 503-512

The wheat/Pyrenophora tritici-repentis interaction: progress towards an understanding of tan spot disease
Author(s): Lamari, L., and Strelkov, S.E.
Publication Date: 2010
Publication: Can. J. Plant Pathol.
Volume: 32
Page Numbers: 4-10

A proteomic evaluation of Pyrenophora tritici-repentis, causal agent of tan spot of wheat, reveals major differences between virulent and avirulent isolates
Author(s): Cao, T., Kim, Y.M., Kav, N.N.V., and Strelkov, S.E.
Publication Date: 2009
Publication: Proteomics
Volume: 9
Page Numbers: 1177-1196

A proteomic evaluation of Pyrenophora tritici-repentis, causal agent of tan spot of wheat, reveals major differences between virulent and avirulent isolates
Author(s): Cao, T., Kim, Y.M., Kav, N.N.V., and Strelkov, S.E.
Publication Date: 2009
Publication: Proteomics
Volume: 9
Page Numbers: 1177-1196

Metabolic changes in roots of the oilseed canola infected with the biotroph Plasmodiophora brassicae: phytoalexins and phytoanticipins
Author(s): Pedras, M.S.C., Zheng, Q., and Strelkov, S.E.
Publication Date: 2008
Publication: J. Agric. Food Chem
Volume: 56
Page Numbers: 9949-9961.

Quantification of ToxB gene expression and formation of appressoria by isolates of Pyrenophora tritici-repentis differing in pathogenicity
Author(s): Amaike, S., Ozga, J.A., Basu, U., and Strelkov, S.E.
Publication Date: 2008
Publication: Plant Pathol.
Volume: 57
Page Numbers: 623-633

The anthraquinone catenarin is phytotoxic and produced in leaves and kernels of wheat infected by Pyrenophora tritici-repentis
Author(s): Bouras, N., and Strelkov, S.E.
Publication Date: 2008
Publication: Physiol. Mol. Plant Pathol.
Volume: 72
Page Numbers: 87-95

Characterization of Fusarium avenaceum from lupin in central Alberta: Genetic diversity, mating type and aggressiveness
Author(s): Holtz, M.D., Chang, K.F., Hwang, S.F., Gossen, B.D., and Strelkov, S.E.
Publication: Can. J. Plant Pathol.
Volume: 33
Page Numbers: 61-76

Influence of water activity and temperature on growth and mycotoxin production by isolates of Pyrenophora tritici-repentis from wheat
Author(s): Bouras, N., Kim, Y.M., and Strelkov, S.E.
Publication: Int. J. Food Microbiol.

Oxalic acid mediated stress responses in Brassica napus L
Author(s): Liang, Y., Strelkov, S.E., and Kav, N.N.V.
Publication: Proteomics