title: The effects of pruning and nodal adventitious roots on polychlorinated biphenyl uptake by Cucurbita pepo grown in field conditions.
abstract: Two cultivation techniques (i-pruning and ii-nodal adventitious root encouragement) were investigated for their ability to increase PCB phytoextraction by Cucurbita pepo ssp pepo cv. Howden (pumpkin) plants in situ at a contaminated industrial site in Ontario (Aroclor 1248, mean soil [PCB] = 5.6 μg g(-1)). Pruning was implemented to increase plant biomass close to the root where PCB concentration is known to be highest. This treatment was found to have no effect on final shoot biomass or PCB concentration. However, material pruned from the plant is not included in the final shoot biomass. The encouragement of nodal adventitious roots at stem nodes did significantly increase the PCB concentration in the primary stem, while not affecting shoot biomass. Both techniques are easily applied cultivation practices that may be implemented to decrease phytoextraction treatment time.
authors.affiliation: Department of Chemistry and Chemical Engineering, Royal Military College of Canada, PO Box 17000 Station Forces, Kingston, ON, Canada.
authors.forename: Jennifer E
authors.initials: JE
authors.lastname: Low
authors.forename: Melissa L Whitfield
authors.initials: ML
authors.lastname: Åslund
authors.forename: Allison
authors.initials: A
authors.lastname: Rutter
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Zeeb
mesh_terms: D000383:Agriculture; D001140:Aroclors / Q000378:metabolism*; D018533:Biomass; D028464:Cucurbita / Q000254:growth & development / Q000378:metabolism*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D009864:Ontario; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000254:growth & development / Q000378:metabolism; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D001140:Aroclors; D012989:Soil Pollutants; C028617:aroclor 1248