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MB Sample ID: SA240796
Local Sample ID: | HILIC-10-pos |
Subject ID: | SU002495 |
Subject Type: | Plant |
Subject Species: | Brassica napus |
Taxonomy ID: | 3708 |
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Treatment:
Treatment ID: | TR002507 |
Treatment Summary: | Sodium silicate (Na2SiO3, Mol. Wt: 122.06 g/L), obtained from Sigma-Aldrich (St. Louis, US), was mixed with 100 g Sunshine Professional Growing Mix (Sun Gro Horticulture, Seba Beach, Canada) and the following mixtures (treatments) were produced: 0.0 g Si (control), 0.1 g Si (Si:soil in 1:1000, wt/wt), 0.25 g (Si:soil in 1:400, wt/wt), 0.5 g (Si:soil in 1:200, wt/wt), 0.75 g (Si:soil in 3:400, wt/wt) and 1.0 g (Si:soil in 1:100, wt/wt). These treatments, hereafter, reported as Si0.0 or PC, Si0.1, Si0.25, Si0.5, Si0.75 and Si1.0, respectively. After mixing thoroughly, the pH of the soil mix was determined prior to seeding. A clubroot susceptible spring canola (Brassica napus L.) cultivar Hi-Q, developed at the University of Alberta, was used in this study. The plants were grown under greenhouse conditions (22/19°C and 16/8h photoperiod) on the above-mentioned six soil media (treatments) containing varying concentration of Si. A total of 30 plants, from three replications of each treatment (i.e. 10 plants per replication) were used. A single spore suspension of P. brassicae pathotype 3, classified as pathotype 3H (P3H) under the Canadian Clubroot Differential (CCD) set, was prepared by homogenizing the clubroot galls, and used to inoculate the seedlings following previously described procedures. |