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Molecules 2016, 21(4), 502; doi:10.3390/molecules21040502

Potential of the Endophytic Fungus Phialocephala fortinii Rac56 Found in Rhodiola Plants to Produce Salidroside and p-Tyrosol

Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, China
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Academic Editor: Marcello Iriti
Received: 25 February 2016 / Revised: 22 March 2016 / Accepted: 6 April 2016 / Published: 16 April 2016
(This article belongs to the Section Metabolites)
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Abstract

2-(4-Hydroxyphenyl)ehyl-β-d-glucopyranoside (salidroside) and 4-(2-hydroxyethyl)phenol (p-tyrosol) are famous food and medicine additives originally derived from alpine Rhodiola plants. Salidroside or p-tyrosol production by the endophytic fungus Rac56 (Phialocephala fortinii) was confirmed by UPLC/Q-TOF-MS and 1H-NMR. The fermentation conditions were optimized by orthogonal design using data processing system software. The broth fermentation results showed that salidroside and p-tyrosol extraction yields from Rac56 were stable and reached 1.729 ± 0.06 mg and 1.990 ± 0.05 mg per mL of culture medium, respectively. The optimal conditions for salidroside and p-tyrosol production in fermentation culture of Rac56 were determined to be 25 °C, pH values of 7 and 5, Czapek-Dox culture medium volumes of 150 mL and 50 mL in 250 mL flasks, rotation speeds of 100× g and 200× g, and fermentation durations of 7 and 15 days, respectively. Under these optimal conditions, stable yields of 2.339 ± 0.1093 mg and 2.002 ± 0.0009 mg per mL of culture medium of salidroside and p-tyrosol, respectively, were obtained, indicating that the P. fortinii Rac56 strain is a promising source of these compounds. View Full-Text
Keywords: Phialocephala fortinii; fungal bioactivity; Rhodiola angusta; accumulation of active component Phialocephala fortinii; fungal bioactivity; Rhodiola angusta; accumulation of active component
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Cui, J.; Guo, T.; Chao, J.; Wang, M.; Wang, J. Potential of the Endophytic Fungus Phialocephala fortinii Rac56 Found in Rhodiola Plants to Produce Salidroside and p-Tyrosol. Molecules 2016, 21, 502.

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