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KMID : 0352720110350020155
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Journal of Ginseng Research
2011 Volume.35 No. 2 p.155 ~ p.161
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Morphological and Ginsenoside Differences among North American Ginseng Leaves
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Proctor John T. A.
Sullivan Alan J.
Rupasinghe Vasantha P. V.
Jackson Chung-Ja C.
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Abstract
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Leaf characteristics of mature 2, 3 and 4-year-old North American ginseng (Panax quinquefolius L.) leaves on fruiting and nonfruiting (NF) plants were studied. Leaflets of the 2-year-old plants had the lowest fresh and dry weight, area, volume and internal gas volume. Inflorescence removal in 3-year-old plants did not affect leaf characteristics or ginsenoside concentration but in 4-yearold plants it increased leaf fresh (38.6%) and dry (43.9%) weight, leaf area (29.1%), specific leaf mass (11.4%), leaf volume (43.1%), and leaf thickness (12.1%), and decreased leaf water content (6.2%). Cultivated ginseng, although an understorey plant, had the specific leaf mass, 35.6 g m?² (range, 36 to 39 g m?²) and a chlorophyll a/b ratio of 2.40 to 2.61, both suggesting the ability to perform like a sunny habitat plant. Also, specific leaf mass of 35.6 g m?² is similar to that reported for perennial plants, 36.8 g m?², rather than that for annuals, 30.9 g m?².
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KEYWORD
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Dry weight, Inflorescence removal, Panax quinquefolius, Shade plant
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