Changes in antioxidant capacity, main bioactive compounds and volatile constituents of Rhodiola kirilowii after introduction and acclimatization.

doi:10.13287/j.1001-9332.201709.017

Abstract

Abstract: An experiment was conducted on the antioxidant capacity, contents of soluble sugar, flavonoids, phenolics and salidroside, and volatile constituents in rhizome (taproot and lateral root) of cultivated and wild Rhodiola kirilowii selected from Luqu County, Gannan Tibetan Autonomous, Gansu Province, China. The results showed that the inhibition rate (I) and ferric reducing/antioxidant power (FRAP) value, the contents of soluble sugar, total flavonoids, phenolics and salidroside in the rhizome of cultivated R. kirilowii were significantly higher than that of wild plant, respectively. Both of the rhizomes of cultivated and wild R. kirilowii contained 21 volatile constituents, with acetophenone, 2-furaldehyde and hexadecanoic acid occupying high relative contents. The relative changes of 15 volatile constituents in cultivated rhizome were higher compared with that of wild rhizome, such as 3-hydroxydodecanoic acid, 2,4-di-tert-butylphenol and linoleoyl choride in taproot, and 2-acetyl furan, p-hydroxyphenyl ethanol and eugenol in lateral root. I and FRAP value, the contents of total flavonoids, phenolics and salidroside in lateral root of cultivated and wild R. kiri-lowii were significantly higher than that of taproot. There were 12 volatile constituents increased in lateral root compared with taproot, such as 3-hydroxydodecanoic acid, 10,13-octadecadiynoic acid methyl ester, p-hydroxyphenylethanol. After introduction and acclimatization, the antioxidant capa-city, contents of main bioactive compounds and volatile constituents in the rhizome of R. kirilowii were superior to that of wild species, and the quality of lateral root was better than taproot.

LI Meng-fei, YAO Yuan-yuan, YANG Lin-gui, GE Li, WANG Ke-peng, YANG De-long, XING Hua. Changes in antioxidant capacity, main bioactive compounds and volatile constituents of Rhodiola kirilowii after introduction and acclimatization.[J]. Chinese Journal of Applied Ecology, 2017, 28(9): 2947-2954.

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