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KMID : 0613820090190101456
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Journal of Life Science
2009 Volume.19 No. 10 p.1456 ~ p.1462
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Increase of the D-chiro-inositol and D-Pinitol Contents by Abiotic Stress in the Buckwheat Seedlings
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Ahn Chul-Hyun
Park Phun-Bum
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Abstract
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D-chiro-Inositol, which is the isomer of myo-inositol, is a well known drug for the treatment of type II diabetes. The methylated form of D-chiro-inositol, D-pinitol and D-chiro-inositol are synthesized when the plants are exposed to the abiotic stresses such as drought, salinity and low temperature as osmoprotectants. In soybean, myo-inositol is converted to ononitol by O-methyltransferase, and ononitol is converted to D-pinitol by ononitol epimerase and finally converted to D-chiro- inositol by demethylase. However there have been some reports that in buckwheat, myo-inositol can be converted to D-chiro-inositol directly. This study was conducted to determine the changes of soluble cyclitols in buckwheat seedlings after exposure to salt and drought stresses by GC-FID. The results indicated that myo-inositol may be the precursor of D-chiro-inositol biosynthesis.
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KEYWORD
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D-chiro-inositol, D-pinitol, abiotic stress, buckwheat
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