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Abstracts

chloropicrin can be used to control PED but is and 5 1) and their possible relationship with seed yield for field peas and chickpeas for
not commonly practiced in Canada Chloro­ plant agronomic performance and adaptation the precision planter Seed yield of precision
picrin was demonstrated to reduce visual PED during cultivation in boreal climate A field planted lentils was higher than the air drill but
severity in some obser vational trials in NB but study was conducted in Newfoundland where the diference was not statistically significant
its efect on pathogen population density and root membrane lipids were determined at pod (p = 0 08) Crop yields were higher at normal
potato yield was not well studied Biofumi­ formation stage using ultra high­performance compared to lower seeding rates but the
gation using mustard crops as an alternative liquid chromatography linked to hydrophi­ interaction between seeder type and seeding
to chemical fumigation showed potential in lic interaction chromatography coupled to rate was not statistically significant (p < 0 05)
managing PED and other soil­borne pests heated electrospray ioniZation accurate mass for any crop thus indicating that precision
but its efectiveness needs to be evaluated tandem mass spectrometry We obser ved planting of the crops did not reduce the opti­
under potato production systems of NB Two a significant decrease in total neutral lipids mum seeding rates for maximum yields
trials were conducted to compare the efect across the soil pH continuum �from neutral
of biofumigation and chloropicrin fumigation soil pH (79 93�0 60 nmol%) to acidic soil pH 84. Cell­wall reinforcement contributes to
on PED management in a two­year­rotation - 5 1 (70 60�0 39 nmol%)� whereas a concomi­ clubroot resistance
production system in commercial fields in NB tant increase was noticed in forage biomass J TU C KARUNAKARAN Y WEI F YU AND G
from 2017 to 2020 The treatments included production Soybean plants produced signifi­ PENG Saskatoon Research and Development
1) spring barley representing conventional cantly higher biomass of 3 59�0 13 Mg ha at Centre, Agriculture & Agri-Food Canada, 107
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management 2) spring barley plus fall chloro­ pH 5 1 (3 55�0 07 Mg ha at pH 6 compared Science Place, Saskatoon, SK S7N 0X2, Canada;
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picrin fumigation and 3) two crops of brown to lower biomass (2 18�0 23 Mg ha ) at pH 6 8 (C.K.) Canadian Light Source, 44 Innovation
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mustard as biofumigation Biofumigation which suggests that neutral lipids remodula­ Blvd, Saskatoon, SK S7N 2V3, Canada; (Y.W.)
and fumigation significantly increased tuber tion appears to assist forage soybeans plants Department of Biology, University of Saskatche­
yield by 10% and 15% of marketable yield to adapt and attain higher forage biomass at wan, 112 Science Place, Saskatoon, SK S7N 5E2,
respectively in trial one and 3% and 19% of low soil pH in boreal climate Canada.
marketable yield respectively in trial two
Results indicate that both biofumigation and 83. Adapting precision planters for pulse Clubroot (caused by Plasmodiophora bras­
fumigation have a potential to suppress PED crop production in southern Alberta sicae Woronin) is a serious disease of canola
pathogens and increase potato yield in fields G S DHILLON M GRETZINGER AND K COLES (Brassica napus L ) and genetic resistance
with high PED pathogen pressure Farming Smarter, 211034 AB-512, Lethbridge, remains the most cost­efective strategy for
AB T1J 5N9, Canada. management of this disease While monogen­
82. Potential role of root neutral lipids in ic resistance has been widely used the break­
mediating forage soybean acclimation to Precision planting technology provides down of clubroot resistance (CR) has been
cultivation on acidic soil in boreal climate uniform seed placement at precise distances increasingly reported Pyramiding CR genes
M NADEEM O A ADIGUN C F MANFUL T H along the rows and superior depth con­ may lead to broader­spectrum and more
PHAM R THOMAS AND M CHEEMA School trol compared to conventional air seeding durable resistance We investigated the mech­

of Science and the Environment, Memorial systems Thus precision planters have the anisms of resistance conferred by CR genes
University of Newfoundland and Labrador, 20 potential to improve the proportion and uni­ residing on chromosomes A03 and A08 singly
University Drive, Corner Brook, NL A2H 5G4, formity of crop emergence reduce interplant and in stack using fluorescent and electronic
Canada. competition and increase yield This study microscopy assisted with microspectroscopy
compares the performance of precision plant­ Inoculated with pathotype 3H canola lines
Crop plants are known to adapt to their envi­ ers and conventional air drill seeders for seed­ carr ying either single or stacked CR genes
ronment to produce desirable har vest by mo­ ing pulse crops including chickpeas (Cicer showed strong resistance with the arrest of
dulating their membrane lipids Conversely arietinum) lentils (Lens culinaris) faba beans infection process within root­hairs and/or ex­
less is known concerning storage lipid's role in (Vicia faba) soybeans (Glycine max) and field odermis Lines with a single CR gene showed
successful plant adaptation and acclimation peas (Pisum sativum) across three locations a high level of infection in root hairs as in the
to abiotic stressor in the growth environment in southern Alberta from 2019 to 2021 The susceptible cultivar Westar but efectively
Triacylglycerol (TAG) and diacylglycerol (DAG) crops were seeded at normal (100 seeds m ­2 restricted secondar y plasmodia to exodermal
are the main storage lipids and limited infor­ for lentils and pea; 50 seeds m for faba beans cells and blocked the further invasion into
­2
mation suggest that their metabolism appears soybeans and chickpeas) and low (50 seeds root cortex In contrast the line with stacked
to be important in plant response to diferent m for lentils and pea; 25 seeds m for faba CR genes prevented the infection in root hairs
­2
­2
abiotic stresses such as phosphorus or nitro­ beans soybeans and chickpeas) seeding rates causing fewer secondar y infection which was
gen starvation To improve our understanding and at 30 5 cm row spacing for both seeders also restricted to the exodermis There was
of neutral lipids contributions to successful Initial results from the data collected from six strengthening of cell wall with the resistance
plant acclimation to environmental stress we site­years (2019 and 2020) indicate a statisti­ relative to the susceptibility and the main
assessed TAG and DAG metabolism in soy­ cally significant increase in plant emergence components for this cell­wall modification
bean roots exposed to varying soil pH (6 8 6 0 for chickpeas faba beans and field peas and appeared to be increased carbohydrate and

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