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KMID : 0380020200350010044
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Korean Journal of Biotechnology and Bioengineering
2020 Volume.35 No. 1 p.44 ~ p.50
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Effects of Extracted from Photosynthetic Bacteria on the Growth and Quality of Lettuce(Lactuca sativa L.) in a LED-Plant Factory
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Park Ju-Yong
Lee Hye-In
Kim Sang-Yong
We Ji-Hyang
Kim Yang-Hoon
Min Ji-Ho
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Abstract
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Photosynthetic bacteria, Rhodobacter spharoides, can grow using carbon dioxide as a carbon source and produce physiologically active compounds. This study was carried out to investigate the impact of R. sphaeroides extract on the growth and quality of lettuce(Lactuca sativa L.) in the LED-plant factory. The concentrations of R. sphaeroides extracts(0, 4, 8 and 12 mg/L) were supplemented in medium on one day and 14 days after transplanting, respectively. The growth of lettuce as affected by extract amount was evaluated at 14, 28 and 35 days after transplanting and the contents of minerals and chlorogenic acid were analyzed at 35 days after transplanting. As a result, higher growth was obtained in the treatment with R. sphaeroides extract than the control. The extract of R. sphaeroides showed the best growth at 4 mg/L concentration(leaf width- 120%, leaf length- 109%, number of leaves- 113%, total leaf area- 144%, fresh weight- top: 153%, root: 142%, dry weight- top: 137%, root: 120%) and the highest effect at the early stage of growth on 14 days after transplanting(leaf width- 115%, leaf length- 123%, number of leaves- 124%, total leaf area- 158%, fresh weight- top: 139%, root: 120%, dry weight- top: 130%, root: 139%). In addition, the extract of 4 mg/L concentration improved the content of minerals and chlorogenic acid contained in lettuce. Therefore, R. sphaeroides extract suggested the possibility of producing high-value crops through promotion of growth and quality improvement of lettuce.
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KEYWORD
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Photosynthetic bacteria, Rhodobacter spharoides extract, lettuce(Lactuca sativa L.), LED-plant factory
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