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Open AccessArticle

Determination of Adequate Substrate Water Content for Mass Production of a High Value-Added Medicinal Plant, Crepidiastrum denticulatum (Houtt.) Pak & Kawano

by Song-Yi Park 1,2,†, Jongyun Kim 3,† and Myung-Min Oh 1,2,*
1
Division of Animal, Horticultural and Food Sciences, Chungbuk National University, Cheongju 28644, Korea
2
Brain Korea 21 Center for Bio-Resource Development, Chungbuk National University, Cheongju 28644, Korea
3
Division of Biotechnology, Korea University, Seoul 02841, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Agronomy 2020, 10(3), 388; https://doi.org/10.3390/agronomy10030388
Received: 19 February 2020 / Revised: 8 March 2020 / Accepted: 10 March 2020 / Published: 12 March 2020
(This article belongs to the Special Issue Optimizing Plant Water Use Efficiency for a Sustainable Environment)
The effects of substrate water content on the growth and content of bioactive compounds in Crepidiastrum denticulatum were evaluated. Three-week-old seedlings were subjected to four levels of substrate water content (20%, 30%, 45% and 60%) and maintained for 5 weeks. Growth parameters at 5 weeks of transplanting were significantly higher with the 45% substrate water content treatment than with the other treatments. In addition, photosynthetic rate, stomatal conductance and transpiration rate increased significantly and the highest sap flow rate during the day was observed in 45% substrate water content. Total phenolic content and antioxidant capacity per shoot increased significantly with substrate water content, increasing from 20% to 45% and decreased again at 60%. Antioxidant capacity and total hydroxycinnamic acids (HCAs) content per unit dry weight of plants under the 60% treatment were significantly higher than those under the 45% treatment; however, their content per shoot was the highest under the 45% treatment. Thus, 45% substrate water content is a suitable condition for the growth of C. denticulatum and had positive effects on phenolic content, antioxidant capacity, and HCAs content. These results could be useful for the mass production of high-quality C. denticulatum in greenhouses or plant factories capable of controlling the water content of the root zone. View Full-Text
Keywords: antioxidant capacity; bioactive compounds; growth; hydroxycinnamic acids; hydroponics antioxidant capacity; bioactive compounds; growth; hydroxycinnamic acids; hydroponics
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Park, S.-Y.; Kim, J.; Oh, M.-M. Determination of Adequate Substrate Water Content for Mass Production of a High Value-Added Medicinal Plant, Crepidiastrum denticulatum (Houtt.) Pak & Kawano. Agronomy 2020, 10, 388.

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