1. Department of Food Science, University of Guelph, Guelph, Ontario, Canada N1G2W1, Food Research Program, Agriculture and Agri-Food Canada, 93 Stone Road West, Guelph, Ontario, Canada N1G5C9, and Greenhouse and Processing Crops Research Centre, Agriculture and Agri-Food Canada, 2585 Country Road 20, Harrow, Ontario, Canada N0R 1G0