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KMID : 1098420210290060409
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Korean Journal of Medicinal Crop Science
2021 Volume.29 No. 6 p.409 ~ p.417
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Waterlogging Duration and Depth Affect Growth and Photosynthetic Properties of Ginseng
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Suh Su-Jeoung
Moon Ji-Won
Jang In-Bok
Kim Young-Chang
Kim Dong-Hwi
Yu Jin
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Abstract
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Background: Abnormal climate change induces many environmental disasters, including flooding. Panax ginseng C. A. Meyer is highly sensitive to waterlogging, but the experimental approaches to understanding the mechanism are relatively scarce.
Methods and Results: Waterlogging was applied to 2-year-old ginseng plant in July under artificial conditions for 1, 2, 3, and 5 days at two different water levels: above the soil surface [WA(+)] and below the rhizome level [WA(-)]. Growth properties and photosynthetic characteristics were measured during waterlogging, and in the recovery period after waterlogging had stopped. Shoot death was evident in ginseng plants that were treated with WA(+) for 5 days. Growth inhibition in root diameter and root weight were severe when waterlogging lasted more than 3 days, and when the water level was above the soil surface. Chlorophyll fluorescences, Fv/Fm, was significantly decreased during the recovery period in WA(+) for 5 days. Photosynthetic rate and stomatal conductance were influenced after waterlogging, depending on waterlogging duration and water levels.
Conclusions: The degree of damage to ginseng upon waterlogging was dependent on the duration and water level. These results will be helpful to understand the waterlogging response of ginseng, and suggest that photosynthetic characteristics can be used as an indicator of damage from waterlogging.
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KEYWORD
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Panax ginseng C. A. Meyer, Chlorophyll Fluorescence, Environmental Stress, Fine Root, Photosynthetic Rate, Waterlogging
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