The effects of LED light quality on ecophysiological and growth responses of Epilobium hirsutum L., a Korean endangered plant, in a smart farm facility

• Published in: Journal of Ecology and Environment Vol. 46; pp. 161 - 171
• Main Authors: Park, Jae-Hoon, Lee, Jung-Min, Kim, Eui-Joo, You, Young-Han
• Format: Journal Article
• Language: English
• Published: 한국생태학회 01.09.2022
• Subjects: 생물학
• ISSN: 2287-8327; 2288-1220
• DOI: 10.5141/jee.22.021

Background: Epilobium hirsutum L. is designated as an endangered plant in South Korea located in Asia, due to the destruction of its habitats through the development of wetlands. Therefore, in this study, in order to find a light condition suitable for the growth and ecophysiological responses of Epilobium hirsutum L., those of this plant under treatment with various light qualities in a smart farm were measured. Results: In order to examine the changes in the physiological and growth responses of Epilobium hirsutum L. according to the light qualities, the treatment with light qualities of the smart farm was carried out using the red light: blue light irradiation time ratios of 1:1, 1:1/2, and 1:1/5 and a red light: blue light: white light irradiation time ratio of 1:1:1. As a result, the ecophysiological responses (difference between leaf temperature and atmospheric temperature, transpiration rate, net photosynthetic rate, intercellular CO2 partial pressure, photosynthetic quantum efficiency) to light qualities appeared differently according to the treatments with light qualities. The increase in the blue light ratio increased the difference between the leaf temperature and the atmospheric temperature and the photosynthetic quantum efficiency and decreased the transpiration rate and the intercellular CO2 partial pressure. On the other hand, the white light treatment increased the transpiration rate and intercellular CO2 partial pressure and decreased the temperature difference between the leaf temperature and the ambient temperature and photosynthetic quantum efficiency. Conclusions: The light condition suitable for the propagation by the stolons, which are the propagules of Epilobium hirsutum L., in the smart farm, is red, blue and white mixed light with high net photosynthetic rates and low difference between leaf temperature and atmospheric temperature. KCI Citation Count: 0