抄録
Sterol content in tartary buckwheat (Fagopyrum tataricum Gaertner) achenes (N=3) and common buckwheat (Fagopyrum esculentum Moench) achenes (n=11) were examined by GC-MS. All cultivars were found to have essentially the same major sterol content (campesterol, stigmasterol, sitosterol and isofucosterol) and regional variation was small for either achene. Sitosterol was most abundant at 70%∼80% of bulk sterols and other bulk sterols in the achenes were campesterol,stigmasterol and isofucosterol. Trace amount of sterols were present in each achene. Besides four major sterols, 13 sterols from an ester and 9 free sterols were detected in tartary buckwheat. 9 sterols from an ester and 11 free sterols were confirmed present in common buckwheat.
Bulk sterol content in both ‘free’ and ‘bound’ lipids of achenes, leaves and stems of plants was determined by GC. Sterol content on tartary buckwheat achene was 82.5 mg/100 g achene (average, n=3), while that of common buckwheat achene 100.2 mg/100 g achene (average, n=3). Sterol content of leaves was twice as much and that in stems, basically the same as in the achenes. Sterol content was found here for the first time to be high not only in ‘free lipid’, but ‘bound lipid’ as well of leaves and stems of buckwheat.
