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Effective methods for increasing coumestrol in soybean sprouts.
Tomoe Ohta1, Takuhiro Uto1, Hiromitsu Tanaka2
1Faculty of Pharmaceutical Sciences, Department of Pharmacognosy, Nagasaki International University, Sasebo, Nagasaki, Japan.
Plos One
|November 18, 2021
Summary
Coumestrol (CM) is a beneficial plant compound. Researchers developed a method to measure CM in vegetables, finding soybean sprouts have high levels. Cultivating sprouts at 24°C significantly increases CM content for enhanced health benefits.
Area of Science:
- Phytochemistry
- Food Science
- Nutraceuticals
Background:
- Coumestrol (CM) is a bioactive compound found in Leguminosae plants, known for its health benefits.
- Increasing CM content in vegetables is desirable for enhanced nutritional value.
- Soybean sprouts are a potential dietary source of CM.
Purpose of the Study:
- To develop a quantitative method for measuring CM content in vegetables.
- To identify optimal cultivation conditions for increasing CM in soybean sprouts.
- To evaluate the distribution of CM in different parts of soybean sprouts.
Main Methods:
- Development of a high-performance liquid chromatography (HPLC) method for CM quantification.
- Analysis of CM content in nine different vegetables.
- Cultivation of soybean sprouts under varying light, temperature, and water conditions.
- Comparison of CM levels in soybean sprout cotyledons and hypocotyls.
Main Results:
- Soybean sprouts exhibited high CM content (1.76 ± 0.13 μg/g) compared to other tested vegetables.
- CM content was significantly higher in hypocotyls (4.11 ± 0.04 μg/g) than in cotyledons.
- Cultivation at 24°C consistently enhanced CM content in soybean sprouts, irrespective of other factors.
Conclusions:
- A reliable HPLC method for CM analysis was established.
- Soybean sprouts are a rich source of coumestrol.
- Optimal cultivation temperature (24°C) can significantly boost CM levels in soybean sprouts, enhancing their health-promoting potential and commercial value.
