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United States Department of Agriculture

Agricultural Research Service

Title: Where in the Rice Kernel Is 2-Acetyl-1-Pyrroline Located?

item Bergman, Christine
item Webb, Bill

Submitted to: Experiment Station Bulletins
Publication Type: Experiment Station
Publication Acceptance Date: May 1, 1999
Publication Date: N/A

Technical Abstract: US rice imports consist of approximately 80 percent aromatic types. Although they are a much sought after type of rice, little is known about the component, 2-acetyl-1-pyrroline (2-AP), which impacts their popcorn like aroma. The efforts to breed, produce, store and process aromatic rice could be refined from understanding the chemistry of 2-AP. Several aromatic crice samples were separated into fractions ranging from brown rice to over milled rice. The 2-AP was found to exist primarily in an evenly distributed fashion throughout the endosperm. Exposure to several solvents indicated that 2-AP is associated with the bound lipid fraction of rice. 2-AP is primarily located in the endosperm portion of the rice kernel and may be associated with the bound lipid fraction.

Last Modified: 4/21/2015
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