Abstract
Abstract American ginseng (Panax quinquefolius L.), was injured by exposure to 20 pphm ozone and/or 50 pphm (v/v) sulfur dioxide for 6 hr daily for 4 days. Ozone induced upper surface leaflet stippling along the veins and interveinaily, and sulfur dioxide induced mild chlorosis to irregular necrotic areas. Ginseng was less sensitive to ozone and as sensitive to sulfur dioxide as ‘Cherry Belle’ radish (Raphanus sativus L.) and ‘Bel W-3’ tobacco (Nicotiana tabacum L.).
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