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http://dx.doi.org/10.13047/KJEE.2017.31.6.557

Effects of Elevated CO2 Concentration and Increased Temperature on the Growth of Gastrodia elata Blume, Parasitic Medicinal Plant  

Cho, Kyu-Tae (Dept. of Life Science, Kongju National Univ.)
Lee, Soo-In (Dept. of Life Science, Kongju National Univ.)
Jang, Rae-Ha (Dept. of Life Science, Kongju National Univ.)
Park, Jae-Hoon (Dept. of Life Science, Kongju National Univ.)
You, Young-Han (Dept. of Life Science, Kongju National Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.31, no.6, 2017 , pp. 557-563 More about this Journal
Abstract
Gastrodia elata (Orchidaceae) is a perennial parasitic plant that has a unique lifestyle of being in a symbiotic interaction with fungi. The underground root of Gastrodia is used for medicinal treatment to cure high blood pressure, stroke, leukemia, headaches, and especially neurasthenia. This study is intended to investigate the effect of the global warming on the ecological responses of Gastrodia. We cultivated the small tuber of Gastrodia with the oak wood lot and mulberry fungus under control (ambient $CO_2$ concentration + ambient temperature, ACAT), temperature treatment (ambient $CO_2$ concentration+elevated temperature, ACET), and $CO_2$+temperature treatment (elevated $CO_2$ concentration+elevated temperature, ECET). The elevated $CO_2$ concentration was about twice in the ambient air while the elevated temperature was about $2^{\circ}C$ higher than the control group. And then we observed the growth and production of reproductive organs and the underground root. The observation showed that the number of flower stalk was highest at ACET and lowest at ECET. The flower stalk was longest at ACET and shortest at ECET. The inflorescence was longest at ACAT and shortest at ECET. The seed capsule was heaviest at ACET and lightest at ECET. The aboveground biomass was highest at ACET and lowest at ECET. The number of rhizomes was highest at ACET and lowest at ECET. The total rhizome biomass was highest at ACET and lowest at ECET. The average rhizome biomass was highest at ACET and lowest at ECET. The results showed that the growth of Gastrodia increased because of more active growth of Gastrodia elata when only the temperature increased and decreased when both $CO_2$ concentration and temperature increased, indicating the poor growth of Gastrodia elata under the global warming condition. Therefore, the Gastrodia elata plantation should be maintained at the temperature of $20-25^{\circ}C$ and not be exposed to a high $CO_2$ concentration.
Keywords
BIOMASS; ECOLOGICAL RESPONSES; ELEVATED $CO_2$+ELEVATED TEMPERATURE; FUTURE CLIMATIC ENVIRONMENT; PARASITIC PLANT;
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