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Variation of γ-Oryzanol by Incorporation of Green Manure Crops in Korean Rice Cultivars

  • Kim, Heon-Woong (National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Sung-Hyeon (National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Young-Min (National Academy of Agricultural Science, Rural Development Administration) ;
  • Jang, Hwan-Hee (National Academy of Agricultural Science, Rural Development Administration) ;
  • Hwang, Kyung-A (National Academy of Agricultural Science, Rural Development Administration) ;
  • Cho, Hyun-Suk (National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Jeong-Tae (National Institute of Crop Science, Rural Development Administration) ;
  • Jeon, Weon-Tai (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Jung-Bong (National Academy of Agricultural Science, Rural Development Administration)
  • Received : 2014.07.21
  • Accepted : 2014.08.24
  • Published : 2014.08.30

Abstract

The ${\gamma}$-oryzanol, ferulic acid esters, which are well-known for their function on cholesterol lowering and prevention of inflammation, diabetes and cancer, are found in the seeds of cereal crops such as rice, corn, wheat and rye. Among them, rice has been reported to contain the highest ferulic acid esters. Since rice cultivation with green manure as a N source is an environmental friendly agricultural practice, it is necessary to identify and quantify as well as evaluate the variations in these compounds in rice samples as affected by different green manure conditions. A total of ten components of ${\gamma}$-oryzanol were isolated and cycloartenyl ferulate, 24-methylenecycloartanyl ferulate, campesteryl ferulate and sitosteryl ferulate were identified as the major components in Korean rice cultivars, 'Unkwang' and 'Hopum'. Comparing the ${\gamma}$-oryzanol contents of these varieties, 'Unkwang' showed clearly similar pattern with conventional type. With the PLS-DA (partial least squares of discriminant analysis) using SIMCA 11.0 ver., the specific pattern and cluster of ${\gamma}$-oryzanol scores with green manure conditions were confirmed, and thus distinguishing green manure effects were possible.

Acknowledgement

Grant : Cooperative Research Program for Agriculture Science & Technology Development

Supported by : Rural Development Administration

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