Abstract
This study compared physicochemical properties and antioxidant activities according to different harvest times in five varieties of black rice (BR). Five cultivars of BR, Nunkeunheukchal (NKHC), Sinnongheugchal (SNHC), Sintoheugmi (STHM), Josaengheugchal (JSHC), and Heugjinju (HJJ), were selected for the study. Cultivars were transplanted on June 20th and cultivated by the Department of Southern Area Crop Science, NICS in Miryang, Korea. Heading dates of NKHC, SNHC, STHM, JSHC, and HJJ were Aug. 17th, Aug. 30th, Sep. 1st, Aug. 20th, and Aug. 12th, respectively. The five different harvest times were as follows; 35, 40, 45, 50, and 55 days after heading date. The highest level of anthocyanin was 35 days after heading date in all varieties. Levels of anthocyanin in NKHC, SNHC, STHM, JSHC, and HJJ were 164, 203, 251, 67, and 210 mg/100 g, respectively. Content of anthocyanin significantly decreased 35 days after heading in four varieties, excluding JSHC. Highest DPPH IC50 values were 57, 29, 10, and 27 μg/mL in NKHC, SN HC, STHM, and JSHC extracts, respectively. Highest ABTS IC50 values were 24, 13, 9, and 11 μg/mL in NKHC, SNHC, STHM, and JSHC extracts, respectively. The antioxidant activities were highest 35 days after the heading date and significantly decreased in four varieties, excluding HJJ. The antioxidant activity of HJJ showed no significant difference, according to harvest time. This study suggests that the content of anthocyanin and antioxidant activity could be considered as factors affecting optimal harvest period to produce highly qualified black rice.
| Original language | English |
|---|---|
| Pages (from-to) | 1653-1659 |
| Number of pages | 7 |
| Journal | Journal of the Korean Society of Food Science and Nutrition |
| Volume | 44 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2015 Nov 1 |
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Keywords
- Anthocyanin
- Antioxidant activity
- Black rice
- Harvest times
- Polyphenol
ASJC Scopus subject areas
- Nutrition and Dietetics
- Food Science
Cite this
Changes in physicochemical properties and antioxidant activities according to different harvest times in black rice (Oryza sativa L.). / Park, Ji Young; Han, Sang Ik; Hur, Yeon Jae; Lee, Yu Young; Lee, Byung Won; Sim, Eun Yeong; Ham, Hyeonmi; Kim, Byeong Ju; Lee, Chun Woo; Lee, Sung-Joon; Oh, Sung Hwan.
In: Journal of the Korean Society of Food Science and Nutrition, Vol. 44, No. 11, 01.11.2015, p. 1653-1659.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Changes in physicochemical properties and antioxidant activities according to different harvest times in black rice (Oryza sativa L.)
AU - Park, Ji Young
AU - Han, Sang Ik
AU - Hur, Yeon Jae
AU - Lee, Yu Young
AU - Lee, Byung Won
AU - Sim, Eun Yeong
AU - Ham, Hyeonmi
AU - Kim, Byeong Ju
AU - Lee, Chun Woo
AU - Lee, Sung-Joon
AU - Oh, Sung Hwan
PY - 2015/11/1
Y1 - 2015/11/1
N2 - This study compared physicochemical properties and antioxidant activities according to different harvest times in five varieties of black rice (BR). Five cultivars of BR, Nunkeunheukchal (NKHC), Sinnongheugchal (SNHC), Sintoheugmi (STHM), Josaengheugchal (JSHC), and Heugjinju (HJJ), were selected for the study. Cultivars were transplanted on June 20th and cultivated by the Department of Southern Area Crop Science, NICS in Miryang, Korea. Heading dates of NKHC, SNHC, STHM, JSHC, and HJJ were Aug. 17th, Aug. 30th, Sep. 1st, Aug. 20th, and Aug. 12th, respectively. The five different harvest times were as follows; 35, 40, 45, 50, and 55 days after heading date. The highest level of anthocyanin was 35 days after heading date in all varieties. Levels of anthocyanin in NKHC, SNHC, STHM, JSHC, and HJJ were 164, 203, 251, 67, and 210 mg/100 g, respectively. Content of anthocyanin significantly decreased 35 days after heading in four varieties, excluding JSHC. Highest DPPH IC50 values were 57, 29, 10, and 27 μg/mL in NKHC, SN HC, STHM, and JSHC extracts, respectively. Highest ABTS IC50 values were 24, 13, 9, and 11 μg/mL in NKHC, SNHC, STHM, and JSHC extracts, respectively. The antioxidant activities were highest 35 days after the heading date and significantly decreased in four varieties, excluding HJJ. The antioxidant activity of HJJ showed no significant difference, according to harvest time. This study suggests that the content of anthocyanin and antioxidant activity could be considered as factors affecting optimal harvest period to produce highly qualified black rice.
AB - This study compared physicochemical properties and antioxidant activities according to different harvest times in five varieties of black rice (BR). Five cultivars of BR, Nunkeunheukchal (NKHC), Sinnongheugchal (SNHC), Sintoheugmi (STHM), Josaengheugchal (JSHC), and Heugjinju (HJJ), were selected for the study. Cultivars were transplanted on June 20th and cultivated by the Department of Southern Area Crop Science, NICS in Miryang, Korea. Heading dates of NKHC, SNHC, STHM, JSHC, and HJJ were Aug. 17th, Aug. 30th, Sep. 1st, Aug. 20th, and Aug. 12th, respectively. The five different harvest times were as follows; 35, 40, 45, 50, and 55 days after heading date. The highest level of anthocyanin was 35 days after heading date in all varieties. Levels of anthocyanin in NKHC, SNHC, STHM, JSHC, and HJJ were 164, 203, 251, 67, and 210 mg/100 g, respectively. Content of anthocyanin significantly decreased 35 days after heading in four varieties, excluding JSHC. Highest DPPH IC50 values were 57, 29, 10, and 27 μg/mL in NKHC, SN HC, STHM, and JSHC extracts, respectively. Highest ABTS IC50 values were 24, 13, 9, and 11 μg/mL in NKHC, SNHC, STHM, and JSHC extracts, respectively. The antioxidant activities were highest 35 days after the heading date and significantly decreased in four varieties, excluding HJJ. The antioxidant activity of HJJ showed no significant difference, according to harvest time. This study suggests that the content of anthocyanin and antioxidant activity could be considered as factors affecting optimal harvest period to produce highly qualified black rice.
KW - Anthocyanin
KW - Antioxidant activity
KW - Black rice
KW - Harvest times
KW - Polyphenol
UR - http://www.scopus.com/inward/record.url?scp=84948984732&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84948984732&partnerID=8YFLogxK
U2 - 10.3746/jkfn.2015.44.11.1653
DO - 10.3746/jkfn.2015.44.11.1653
M3 - Article
AN - SCOPUS:84948984732
VL - 44
SP - 1653
EP - 1659
JO - Journal of the Korean Society of Food Science and Nutrition
JF - Journal of the Korean Society of Food Science and Nutrition
SN - 1226-3311
IS - 11
ER -