Abstract:

The accumulation of lutonarin and saponarin during different growth and the differences in their contents among the leaves of different barley varieties were determined by HPLC. Results indicated that the content of saponarin was higher than that of lutonarin throughout the whole growth period and both of them displayed a similar change trend, i.e., an initial increase followed by a decrease. The optimal time for harvesting barley leaves was between the stage with three leaves and the stage with three leaves and one heart. Of 20 barely varieties, Baikangqing and Kunlun No.8 exhibited the highest contents of lutonarin and saponarin, respectively; however, the lowest contents of lutonarin and saponarin were both determined in Kangqing NO.3. In addition, Kunlun No.8 exhibited the highest total contents (1.69%) of lutonarin and saponarin, followed by Baikangqing and Kunlun No.1. Therefore, Kunlun NO.8, Baikangqing and Kunlun NO.1 are the selected barley varieties for the purpose of exploiting flavonoid resources.

Key words: barely, lutonarin, saponarin, accumulation, variety