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Abstract Detail



Host/Plant Pathogen Interactions and Plant Health Management

Chang, Kan-Fa [1], Hwang, Sheau-Fang [2], Ahmed, Hafiz U. [3], Fu, Heting [1], Strelkov, Stephen. E. [4], Conner, Robert L. [5], McLaren, Debra L. [6], Harding, Michael [7], Turnbull, George D. [1].

First report of Phytophthora causing root rot in soybean in Alberta, Canada.

Soybean (Glycine max (L.) Merr.) has great potential as a crop in western Canada. However, root rot is a common constraint on soybean production, and occurred in all 29 soybean fields that were surveyed in southern Alberta in 2014. Phytophthora spp. cause seed rot, pre- and post-emergence damping off, stem and root rot wherever soybean is produced, but it has not been previously reported in association with soybean in Alberta. This study examined the presence of Phytophthora spp. on soybean roots collected in southern Alberta. Following a survey of soybean fields in 2014, plants with typical root rot symptoms were plated onto a selective medium (modified PBNIC agar), and 20 isolates were tentatively identified as Phytophthora spp. based on their colony characteristics. Among these, three isolates were homothallic, producing smooth, thick-walled oospores and mostly paragynous with some amphigynous antheridia on lima bean agar. Based on these criteria, the three isolates were identified as Phytophthora sojae Kaufmann & Gerdemann. The identity of the isolates will be confirmed by molecular analysis, and their pathogenicity will be assessed on a collection of soybean genotypes. This is the first report of Phytophthora spp. causing root rot in soybean in Alberta.


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1 - Alberta Agriculture and Rural Development, Research and Innovation, Crop Diversification Centre North, 17507 Fort Road, Edmonton, AB, T5Y 6H3, Canada
2 - Alberta Agriculture and Rural Development, Research and Innovation, Crop Diversification Centre North, 17507 Fort Road, Edmonton Alberta, AB, T5Y 6H3, Canada
3 - Crop Diversification Centre North, Alberta Agriculture and Rural Development, 17507 Fort Road NW, Edmonton, Alberta, T5Y6H3, Canada
4 - University of Alberta, Agriculture, Food and Nutritional Science, 4-16B Agriculture/Forestry Ctr, University of Alberta, Edmonton , AB, T6G 2P5, Canada
5 - Agriculture and Agri-Food Canada, Morden Research Centre, 101 Route 100, Unit 100, Morden, MB, R6M 1Y5, Canada
6 - Agriculture and Agri-Food Canada, Brandon Research Centre, P.O. Box 1000A, R.R. #3, Brandon, MB, R7A 5Y3, Canada
7 - Alberta Agriculture and Rural Development, Research and Innovation, Crop Diversification Centre South, 301 Horticultural Stn Rd E, Brooks, AB, T1R 1E6, Canada

Keywords:
none specified

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PPA025
Abstract ID:797
Candidate for Awards:None


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