Changes in Gastrodia tuber Ethanol Extracts During Grifola frondosa Fermentation
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Gastrodia tuber ethanol extracts can stimulate production of exopolysaccharide and biomass in Grifola frondosa. The main components of G. tuber ethanol extracts were assayed and their metabolic transformations by G. frondosa monitored by HPLC-UV-MS. Gastrodin, p-hydroxybenzyl alcohol, p-hydroxybenzaldehyde, and parishin were identified. The change in gastrodin residue (–268 U) was caused by parishin cracking (121°C, 0.15 MPa), decreasing the gastrodin residue content by 46.84% during 7 days fermentation. The findings will be of use in Chinese medicine processing technology.
Keywordsethanol extracts Gastrodia tuber gastrodin Grifola frondosa HPLC-UV-MS parishin
This work was financially supported by the Natural Science Foundation of China (No. 31060272 in 2011) and Zhejiang University (No. 588040-172210217).